DESCRIPTIONS OF NEW WEST AMERICAN MARINE 
MOLLUSKS AND NOTES ON PREVIOUSLY DESCRIBED 
FORMS. 
By Paul Bartsch, 
Curator, Division of Marine Invertebrates, United States National Museui 
The present paper describes and figures new species of West 
American mollusks belonging to groups which I have previously 
monographed. It represents material that has come to hand since 
the monographs were issued. By far the larger portion of the 
specimens vvere discovered by the U. S. Bureau of Fisheries steamer 
Albat7'oss, but many were contributed by private West American 
collectors, whose zeal and efforts continue to materially increase our 
knowledge of marine life from year to year. In addition to the 
descriptions of new forms, references to species (chiefl}' fossil) de- 
scribed by other authors since the monographs were published have 
been added, and wherever new information on nuclear characters 
was available it is stated. 
I had hoped to be able to present with this a new classification of 
the Rissoidae, but the slowness attending the acquiring of certain 
material necessary to a complete understanding of the group has 
decided me not to withhold the manuscript longer, but to publish 
the data pertaining to members of that famil}'^ under the old familiar 
designation, reserving the necessary changes for the final revision. 
I wish to express my thanks to all the students who have con- 
tributed material to this study, acknoAvledgment for which is made 
under the various species. Credit is due to the photographic divi- 
sion of the United States National Museum for the splendid en- 
larged photographs of the species described, and to Mrs. E. B. 
Decker for the careful and painstaking work of perfecting these 
illustrations by retouching. 
PYRAMIDELLIDA (LONGCHAEUS) COOPERl Anderson and Martin. 
Plate 42, fig. 3. 
PyramideUa cooperi Anderson and Martin, Proc. Cala. Acad. Sci., ser. 4, 
vol. 4, 1914, p. 66, pi. 7, figs. 18a 18&. 
Shell elongate conic, stout, grayish white. All the early whorls 
decollated, the three remaining strongly channeled at the summit, 
flattened between the summit and the peripheral sulcus, angulated 
Proceedings U. S. National Museum. Vol. 52-2193. 
637 
638 FROCEEDING8 OF THE NATIONAL MUHEUM. vol.52. 
posterior to the sulcus. The space between the peripheral angle and 
the channeled summit forms a decided groove that separates the 
whorls. Base short, well rounded. The entire surface of the shell 
is marked by fine incremental lines and well-marked spiral striations. 
Aperture moderately large, oval; posterior angle acute; outer lip 
evenly curved; innei- lip strong, straight, revolute, provided with 
three folds, of which the posterior is very strong, lamellar and par- 
allelly disposed to the peripheral sidcus; the other two folds are less 
strong and much more oblique. 
The specimen described and figured, Cat. No. 194405, U.S.N.M., 
was collected by Mr. George H. Eldridge in the lower Miocene bluffs 
of Kern River, 1 mile below the power developing station, on the 
north side of the river at Bakersfield, California; it consists of the 
last three whorls, and measures — length 6 mm., diameter 3.6 mm. 
PYRAMIDELLA (LONGCHAEUS?) PACKI Dickerson. 
Odostomia pacJxi Dickerson, BuU. Dept. Geol. Uuiv. Cala., vol. 9, No. 17, 
1916, p. 498, pi. 37, fig. 2. 
The type, an incomplete specimen of 12 whorls, measures — length 
10 mm., diameter 3.5 mm. It was collected in the Eocene, Tejon 
formation, at University of California locality 2226, Rose Canyon, 
San Diego Count3^ California. 
Of this the author states that the inner lip is marked by two plaits 
" which is characteristic of this genus." Odostomia never has more 
than one plait. The figure shoAvs a Pyramidella with basal portion 
of the aperture lost, which is probably responsible for the absence of 
the third fold characterizing the subgenus Longchaeus^ to which I 
believe the shell belongs, 
PFRAMIDELLA (PHARCIDELLA) MAGDALENENSIS, new species. 
Plate 42, fig. 1. 
Shell elongate conic, very pale horn yellow; nuclear whorls two, 
well rounded, forming a depressed helicoid spire, the axis of which 
is at right angles to that of the succeeding turns, in the first of which 
it is about one-third immersed. Post-nuclear whorls flattened, nar- 
rowly shouldered at the summit with a deep spiral groove at the 
periphery which shoAvs in the suture of all the turns and gives this the 
appearance of being deeply channeled. Summit of whorls strongly 
crenulated, the weak depressions on the sides of the crenulation pass- 
ing down the sides of whorls for a short distance below the summit ; 
the rest of the surface being marked by fine lines of growth and ex- 
ceedingly fine spiral striations. The deep peripheral sulcus is crossed 
by slender axial riblets, which are more slender and more numerous 
NO. 2193. WEST AMERICAN MARINE M0LLU8K8—BART8CH. 639 
than the crenulations at the summit of the whorls. Base moderately 
long, well rounded, provided with a strong fasciole at the anterior 
end and marked by rather strong incremental lines and very fine 
spiral striations. Aperture oval, posterior angle acute, outer lip 
thin, showing four denticles within, of which the median two are the 
strongest; inner lip thick, almost straight, provided with three folds, 
of which the first is lamellar and almost transversely disposed; it 
covers the posterior portion of the basal fasciole ; the other two folds 
are much Aveaker and much more obliquely placed and extend to the 
anterior portion of the columella; parietal wall glazed with a thin 
callus. 
The type, Cat. No. 268628, U.S.N.M., was dredged by the U. S. 
Bureau of Fisheries steamer Albatross at station 5628, off Redondo 
Point, ISIagdalena Bay, Lower California, in 13| fathoms, on broken 
shell bottom. It has 9 postnuclear whorls and measures — length, 5.8 
mm. ; diameter, 2.1 mm. 
This species is nearest related to Pyramidella {Longchaeus) mazat- 
Janica Dall and Bartsch, but can readily be distinguished from it by 
the fact that the whorls are not overhanging. 
EULIMELLA GABBIANA Anderson and Martin. 
Eulimella oahhiana Anderson iiud Maktin, Proc. Cal. Acad. J^ci., ser. 4, vol. 
4, 1914, p. 68, pi. 7, fig. 20. 
This is a typical Melanella {Eulimella) and does not belong to the 
Pyramidellidae, but to the related family, Melanellidae. The name 
will therefore have to be changed to Melanella gahljiana Anderson 
and Martin. The type No. 143 California Academy of Sciences comes 
from the Lower Miocene, in the bottom of a small canyon about 1| 
miles due north of Barker's ranch house, Kern River, Kern County, 
California. 
PYRAMIDELLA (SYRNOLA) OCHSNERI Anderson and Martin. 
EuliDicUa ochsncri Anderson and Martin, Proc. Cal. Acad. Sci.. vol. 4. 1914, 
p. 66, pi. 7, figs. 23(7 aud 23^. 
Anderson and Martin described this species which they collected 
in the Lower Miocene in the bottom of a small canyon about 1| miles 
due north of Barker's ranch house, Kern County, California, locality 
64. They give a rather incomplete description and state that the 
type, which has a broken apex, is 8 mm. long and 3 mm. in diameter. 
From the brief description and the figure I am inclined to believe 
that it is not a Eulimella, but belongs to the subgenus Syrnola. A 
comparative statement in the same publication (p. 67) under EiiU- 
mella dilleri strengthens this belief. The type. No. 138, and cotype, 
No. 139, are in the California xA.cademy of Sciences. 
640 PROCEEDINGS OF THE NATIONAL 7>[rSEUM. vol.52. 
PYRAMIDELLA (SYRNOLA) DILLERI Anderson and Martin. 
EuUmella dilleri Anderson and Martin, Proc. Cal. Acad. Sci., vol. 4, 1914, 
p. 67, pi. 7, fig. 24. 
Anderson and Martin found this species in the sea cliff (Miocene), 
one-quarter mile north of the lighthouse at Cape Foulweather, 4 miles 
noith of Yaquina Bay, locality 37. The type, No. 140, California 
Academy of Sciences, consists of the last eight whorls and measures 
9.5 mm. long and 3.5 mm. wide. 
TURBONILLA (STRIOTURBONILLA) CANADENSIS, new species. 
Plate 44, fig. 11. 
Shell elongate conic, slender, yellowish white. Nuclear whorls 
small, two and one-half, depressed helicoid, having their axis at right 
angles to that of the succeeding turns, in the first of which they are 
about one-fourth immersed. Postnuclear whorls almost flattened, 
rather high between the sutures, appressed at the summit, marked by 
quite regular, slightly curved, protractive, axial ribs, of which 14 
occur upon the first, 16 upon the second and third, 18 upon the fourth 
to seventh, 20 upon the eighth, and 22 upon the ninth and the 
penultimate turn. Intercostal spaces not quite as wide as the ribs, 
deeply impressed, terminating at the periphery, which is decidedly 
angulated. There is a smooth space between the periphery and the 
succeeding whorl, which falls at some little difei:ance anterior to the 
periphery of the preceding turn. This gives the whorls a somewhat 
overhanging appearance. Suture well constricted. Base short, well 
rounded, entire surface marked by microscopic striations. Aperture 
subquadrate, posterior angle obtuse ; outer lip thin ; inner lip slightly 
curved and somewhat revolute. 
The type, Cat. No. 273964, U.S.N.M., was collected by G. Willett, 
at Forrester Island, Alaska. It is a complete specimen of 11 post- 
nuclear whorls, and measures — length, 6.3 mm.; diameter, 1.5 mm. 
Two additional specimens of this species are in Mr. Willett's col- 
lection. 
TURBONILLA (STRIOTURBONILLA) MONTEZUMA, new species. 
Plate 44, fig. 1. 
Shell broadly elongate conic, yellowish-white, nuclear whorls two 
and one-fourth, well rounded, forming a very depressed helicoid 
spire, having its axis at a right angle to that of the succeeding turns 
in the first of which it is about one-fourth immersed. Postnuclear 
whorls well rounded, appressed at the summit, ornamented with very 
strong, narrow, well rounded, slightly protractive axial ribs of which 
18 occur upon the first, 16 upon the second, 14 upon the third to 
% 
NO. 2193. WEST AMERICAN MARINE MOLLUSKS—BARTSCH. 641 
seventh, and 18 upon the penultimate turn. These ribs become 
somewhat enfeebled and slightly expanded toward the summit. 
Intercostal spaces about 3^ times as wide as the ribs marked by a 
ciouble series of incised pits, of which one is midway between the 
summit and the periphery while the other is at the periphery. The 
space between the summit and the median pit is marked by 13 slender 
incised striations of varying strength, while that between the median 
and peripheral pit is crossed by 9 incised lines. Suture moderately 
constricted. Periphery of the last whorl angulated, marking the 
termination of the axial ribs and intercostal spaces. Base very short, 
well rounded, marked by 14 subequal and subequally spaced feebly 
incised wavy spiral striations and slender incremental lines. 
Aperture very short, decidedlj^ subquadrate, the angles at the junc- 
tion of the outer and basal lip and the basal and inner lips being 
almost right angles; posterior angle obtuse; outer lip thin, showing 
the external sculpture within; inner lip very slightly oblique, and 
slightly revolute; parietal wall glazed by a thin callus. 
The "'type, Cat. No. 268232 U.S.N.M., was dredged by the U. S. 
Bureau of Fisheries steamer Albatross at station 5678, off Redondo 
Point, Magdalena Bay, Lower California, in 13^ fathoms, on broken 
shell bottom. It has 9 postnuclear whorls and measures — length, 
4.7 mm. ; diameter, 1.5 mm. 
TURBONILLA (STRIOTURBONILLA) BARKLEYENSIS, new species. 
Plate 42, fig. 8 ; plate 44, fig. 9. 
Shell large, slender, elongate conic, bluish white. Nuclear whorls 
small, a little more than two and a quarter, depressed helicoid, hav- 
ing their axis at right angles to that of the succeeding turn, in the 
first of which they are slightly immersed. Postnuclear whorls well 
rounded, appressed at the summit, marked by slender, curved, mod- 
erately regular, slightly protractive, axial ribs, of which 16 occur upon 
the first to fifth, 18 upon the sixth, 22 upon the seventh and eighth, 
24 upon the ninth and tenth, and 26 upon the penultimate turn. In- 
tercostal spaces moderately impressed, terminating a little posterior to 
the periphery of the whorls. The summit of the succeeding turns falls 
a little anterior to the termination of the intercostal pits and leaves 
a smooth band in the suture. Suture moderately constricted. Pe- 
riphery of the last whorl obtusely angulated. Base moderately long, 
weakly rounded. The entire surface of the shell is marked by 
microscopic striations. Aperture large, broad, subquadrate, some- 
what effuse at the junction- of the basal and the outer lip, posterior 
angle obtuse; outer lip very thin, showing the external sculpture 
within; inner lip decidedly oblique, slightly curved and somewhat 
revolute ; parietal wall covered by a thin callus. 
65008°— Proc.N.M. vol.52— 17 41 
642 PROCEEDINGS? OF THE NATIONAL MUSEUM. vol, 52. 
The type and 25 specimens of this species were collected by the 
Geological Survey of Canada, at low tide to deep water, in Barclay 
Sound, Vancouver Island. Fourteen of these are in the collection 
of the National Museum, the others are in the Geological Survey of 
Canada collection. 
The type, Cat. No. 211568 U.S.N.M., has lost the nucleus and a 
part of the first postnuclear turn, the 12 larns remaining measure — 
length, 9.2 mm.; diameter, 2 mm. The nuclear characters were 
described from another specimen, bearing the same entry number. 
This species was reported in former publications under the name 
of Turhonilla (StriotitrboniUa) serrae Dall and Bartsch, from which 
it is readily distinguished by its appressed whorls, the summits of 
Turhonilla {Strioturhonilla) serrae being decidedly shouldered. 
TURBONILLA (STRIOTURBONILLA) SANTAMARIANA, new species. 
Plate 44, fig. 2. 
Shell slender, regularly elongate conic, milk white. Nuclear 
whorls two and one half, large, well rounded, forming a decidedly 
elevated spire, the axis of which is at right angles to that of the 
succeeding turns, in the first of which it is about one- fifth immersed. 
Postnuclear whorls \Qvy high between the sutures, feebl}^ shouldered 
at the summit, marked by very regular, almost straight, well rounded 
axial ribs which become slightly enfeebled toward the summit and 
terminate at the periphery. Of these ribs 14 occur upon the first 
and second, 16 upon the third to sixth, 18 upon the ninth, and 20 
upon the penultimate turn. Intercostal spaces a little wider than 
the ribs, terminating abruptly, a little posterior to the suture, thus 
leaving a narrow, smooth, spiral band at the moderately constricted 
suture. Periphery of the last whorl well rounded. Base mod- 
erately long, strongly rounded, marked by incremental lines, and 
the fine very regularly and closely spaced wavy spiral striations. 
Aperture elongate oval ; posterior angle acute ; outer lip thin ; inner 
lip slender, oblique, slightly revolute, without visible fold; parietal 
wall glazed with a thin callus. 
The type. Cat. No. 267744c U.S.N.M., was dredged in shallow 
water in Santa Maria Bay, Lower California. It has 11 post- 
nuclear whorls and measures — length, 4.7 mm. ; diameter, 1 mm. 
TURBONILLA (STRIOTURBONILLA) DOREDONA, new species. 
Plate 44, fig. 3. 
Shell very regularly, broadly elongate conic, yellowish white. Nu- 
clear whorls 2f , strongly rounded, smooth, forming a strongly elevated 
spire having its axis at right angles to that of the succeeding turns, 
NO. 2193. WEST AMERICAN MARINE M0LLUSK8—BARTSCH. 643 
ill the first of which the side of the last vohition is about one-fifth 
immersed. Postnnclear whorl well rounded, slightly curA-ed at the 
aj^pressed summit, marked by rather distantly spaced, slender, nar- 
row, well-rounded axial ribs, which become somewhat flattened and 
enfeebled toward the summit. Of these ribs 18 occur upon the first, 
16 upon the second to fourth, and 18 upon the remaining turns. 
Intercostal spaces about two and one-half times as wide as the ribs, 
terminating at little posterior to the suture, thus leaving a very 
narrow plain band between their termination and the summit of the 
succeeding turn. Suture moderately constricted. Periphery of the 
last whorl well rounded. Base short, strongly rounded, marked by 
the feeble continuations of the axial ribs, which become evanescent 
before reaching the middle of the base. Entire surface of the shell 
crossed b}^ rather marked, subequally strong and subequally spaced 
deepl.y incised spiral striations. Aperture subquadrate; i^osterior 
angle obtuse (outer lip partly fractured) ; inner lip thick, almost 
straight, and somewhat revolute, provided with an obsolete oblique 
fold a little anterior to its insertion; parietal wall glazed by a fine 
callus. 
The type, Cat. No. 268719, U.S.N.M., was dredged by the U. S. 
Bureau of Fisheries steamer Albatross at station 5678, off Redondo 
Point, Magdalena Bay, Lower California, in 13| fathoms, on broken 
shell bottom. It has 8 postnuclear whorls and measures — length, 
1.2 mm. ; diameter, 1.3 mm. The unique type is an adolescent shell, 
and it is quite possible that when adult specimens are obtained it will 
be found that the axial ribs terminate at the periphery instead of 
continuing feebly upon the base. 
TURBONILLA (STRIOTURBONILLA) REDONDOENSIS. new species. 
Plate 42, fig. 4. 
Shell large, broadly elongate conic, yellowish white. Nuclear 
whorls decollated. Postnuclear whorls strongly rounded, with a 
strong sloping shoulder which extends over the posterior two-fifths 
of the whorls. Surface marked by strong, distantly spaced, well- 
rounded, regular, lamellose, slightly curved, protractively slanting 
axial ribs, of which 14 occur upon the first three whorls and 16 upon 
the rest except the last, which has 18. These ribs become somewhat 
enfeebled and flattened toward the summit and terminate at the pe- 
riphery. Intercostal spaces about double the width of the ribs, shal- 
low, terminating a very little posterior to the suture, thus leaving a 
very narrow smooth band immediately posterior to the summit of 
the succeeding turn. Suture quite strongly constricted. Periph- 
ery of the last turn obscurely angulated. Base short, almost flat- 
tened, marked by fine incremental lines and fine, rather regularly 
644 PROCEEDTXaS OF THE NATIONAL MUSEUM. vol.52. 
and somewhat distantly spaced spiral stnations. Aperture sub- 
quadrate; posterior angle obtuse; outer lip thin, showing the external 
sculpture within ; inner lip moderately stout, almost A'ertical, slightly 
revolute, apparently without fold; parietal w^all glazed by a thin 
callus. 
The type, Cat. 268718, U.S.N.M., was dredged by the U. S. Bureau 
of Fisheries steamer Albatross at station 5678, off Kedondo Point, 
Magdalena Bay, Lower California, in 13i fathoms, on broken shell 
bottom. It has lost the nuclear turns and probably a half of the 
first postnuclear whorl ; the 13 remaining measure — length, 7.4 mm. ; 
diameter, 1.9 mm. 
The present species is nearest related to Turhanilla (Strioturbo- 
nilla) humerosa Bartsch, but differs from this by having fewer, 
stronger, and more distantly spaced axial ribs. 
TURBONILLA (STRIOTURBONILLA) SCHMITTI. new species. 
Plate 43, fig. 8. 
Shell elongate conic, rather stout, bluish white. Nuclear whorls 
small, strongly rounded, forming a decidedly elevated spire, the axis 
of which is at right angles to that of the succeeding turns, in the 
first of which it is about one-fourth immersed. Postnuclear whorls 
almost flattened, somewhat excurved below the strongly tabulately 
shouldered summit, marked by somewhat sinuous, decidedly protrac- 
• tively slanting, strong, regular, well-rounded axial ribs, of which 20 
occur upon the first and second, 22 upon the third, and 24 upon the 
remaining turns. These ribs extend strongly from the summit of 
the whorls, where they appear as slender cusps, to the periphery, 
w^here the}^ terminate. Intercostal spaces a little wdder than the 
ribs, terminating also at the periphery. Suture rendered strongly 
channeled by the shouldered summit. Periphery of the last whorl 
well rounded. Base moderately long, well rounded, marked by strong 
incremental lines and the exceedingly fine, closely spaced spiral stria- 
tions which cover the entire surface of the shell. Aperture oval; 
posterior angle narrowly squarely truncated by the flattened summit ; 
outer lip thin, showing the external sculpture within; inner lip 
slender, slightly oblique, and weakly revolute, provided with a very 
feeble oblique internal fold at its insertion which is scarcely notice- 
able when the aperture is viewed squarely. 
The type and two specimens of this species. Cat. No. 265739, 
U.S.N.M., were obtained in shallow water at Point Abreojos, Lower 
California. The type has 10 postnuclear whorls and measures — 
length, 6.3 mm.; diameter, 2 mm. One of the other specimens has 
11 postnuclear whorls and measures — length, 7.3 mm.; diameter, 
2.1 mm. 
NO. 2193. WEST AMERICAN MARINE MOLLUSKS—BARTSCH. 645 
This species is quite unlike any of the other Imown west American 
forms. It recalls somewhat Turbonilla {Stnoturhonilla) panumen^sis 
C. B. Adams, from Panama, in the very regular and oblique disposi- 
tion of its axial ribs. 
TURBONILLA (PYRGOLAMPROS) HANNIBALI. new species. 
Plate 43. fig. 7. 
Shell elongate conic, yellowish white. Nuclear whorls decollated, 
Postnuclear whorls almost flattened, narrowly shouldered at the 
summit, marked by ill-defined indications of axial ribs, which are 
entirely too poorly developed to permit counting. The spiral sculp- 
ture consists of slender, closel}^ spaced striations. Sutures strongly 
impressed. Periphery of the last whorl obtusely angulated. Base 
moderately long, well rounded, marked like the spire. Aperture 
broadly oval; posterior angle acute; inner lip almost vertical, some- 
what sinuous, and slightly reflected. 
The type and two additional specimens. Cat. No. 252428, U.S.N.M., 
were collected by Mr. Harold Hannibal in the Upper Pliocene " Elk 
Eiver beds," at the mouth of Elk River at Port Orford, Oregon. 
The type has nine postnuclear whorls and measures — length, 9 mm.; 
diameter, 2.5 mm. 
The present species recalls Turhonilla {Pyrgolampros) oregonen- 
ds Bartsch, but is larger in every way than that species and has the 
summit of the whorls appressed, not tabulated ; the spiral sculpture 
also is much more strongly developed. Turhonilla {Pyrgolampros) 
hannibali differs from Turhonilla {Pyrgolampros) lituyana Dall and 
Bartsch in being smaller and in having the ribs much less strongly 
indicated than in that species. 
TURHONILLA (PYRGOLAMPROS) FRANCISCANA. new species. 
Plate 42, fig. 2. 
Shell elongate conic, flesh colored, excepting a broad chestnut 
band which covers the median third of the last whorl. This dark 
band really consists of two chestnut-colored zones, the anterior of 
which embraces half of the band while the posterior is equal to 
one-fourth of the width of the dark area, the two being separated 
by a zone of a little lighter shade which is as wide as the posterior 
zone. Nuclear whorls decollated in all the specimens seen. Post- 
nuclear whorl rather high between the sutures, feebly shouldered at 
the summit, and slightly constricted at the periphery. Early post- 
nuclear whorls marked by low, rounded, broad, almost vertical axial 
ribs which are wider than the shallow impressed spaces that separate 
them. On the later whorls the axial ribs become quite obsolete. On 
the first of the postnuclear whorls there are eighteen of these ribs; 
64G PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 
on the second to fourth, twenty; on the fifth they become decidedly 
feeble; and on the remainder they are not at all differentiated. In 
addition to the axial sculpture the surface of the shell is marked 
by very fine, wavy, closely spaced spiral striations. Periphery of 
the last whorl well rounded. Base moderately long, well rounded, 
marked by lines of growth and spiral striations comparable to those 
on the spire. Aperture broadly oval; outer lip thin, showing the 
color markings wnthin. Columella curved, somewhat twisted, and 
slightly revolute; parietal wall glazed with a thin callus. 
The type and 17 specimens, Cat. No. 214135, U.S.N.M., was 
dredged by the U. S. steamer Alhaty^oss at station 5743, in 10-15^ 
fathoms, on very fine sand and mud bottom, San Francisco Bay, 
California. The type has lost the nucleus and probably the first 
of the postnuclear turns. The eight remaining measure — length, 6.8 
mm.; diameter, 2 mm. 
There are three additional lots of specimens in the collection of 
the United States National Museum, likewise dredged by the U. S. 
Bureau of Fisheries steamer Albatross in San Francisco Bay. These 
are: Cat. No. 214433, 3 specimens, from station 5729, in 4| fath- 
oms, on mud bottom; Cat. No. 214434, 16 specimens, from station 
5744, in 5| fathoms, on sandy mud bottom; Cat. No. 214436, 4 
specimens, from station 5703, in 8^ fathoms, on mud bottom. 
This species belongs to the obsoletely sculptured group of Pyrgo- 
lampros^ embracing halistrepta^ pesa, rineUa, lituyana, and ore- 
gonensis. 
TURBONIIiLA (PYRGOLAMPROS) HEMPHILLI, new species. 
Plate 44, fig. 8. 
Shell elongate conic. Nuclear whorls moderately large, one and 
one-half planorboid, having their axis at right angles to that of the 
succeeding turns, in the first of which they are scarcely at all im- 
mersed. The sides of the nuclear whorls project slightly beyond the 
outline of the spire. Postnuclear turns feebly rounded, appressed 
at the summit, marked by moderately strong, low, almost vertical 
axial ribs, which are very feeble on the first two turns, on the third 
and fourth there are 16, on the fifth to seventh there are 18, while 
on the last turn they become decidedly enfeebled and too irregular 
to permit counting. Intercostal spaces shallow, about as wide as the 
ribs. Suture moderately constricted. The summit of the whorls 
falls a little anterior to the periphery and gives to the whorls a 
slightly over-hanging appearance. Periphery inflated, w^ell rounded. 
Base moderately long, well rounded, marked by the feeble continua- 
tions of the axial ribs, which extend to the umbilical chink. Entire 
surface marked by fine, closely spaced, spiral striations. Aperture 
broadly oval, posterior angle acute ; outer lip thin ; inner lip strongly 
NO. 2193. WEST AMERICAN MARINE M0LLUSKS—BART8CH. 647 
curved and slightly revolute; parietal wall covered with a thin 
callus. 
The type and 21 specimens, Cat No. 135053, U.S.N.M., were col- 
lected by Henry Hemphill in the Pliocene of a well boring, 140 feet 
below the surface, at San Diego, California. The type has lost the 
nucleus and probably half of the first postnuclear turn. The nine 
remaining whorls measure — length, 6.7 mm. ; diameter, 1.9 mm. The 
nuclear whorls were described from one of the other specimens, 
which may be considered a paratype. 
TURBONILLA (PYRGOLAMPROS) PUGETENSIS, new species. 
Plate 44, fig. 4. 
Shell small, elongate conic, wax yellow with a broad band of pale 
brown which extends posterior from the periphery, gradually fading 
into the general lighter color. Nuclear whorls and early postnu- 
clear turns decollated in all our specimens; those remaining feebly 
shouldered at the summit, flattened in the middle, becoming consid- 
erably contracted and rounded toward the suture, marked by broad, 
well rounded slightly protractive axial ribs which become somewhat 
enfeebled and expanded toward the summit. Of these ribs 16 occur 
upon all of the turns remaining excepting the last which has 18. 
Intercostal spaces shallow, about as wide as the ribs. Suture moder- 
ately contracted. Periphery of the last whorl well rounded. Base 
somewhat inflated, well rounded, marked by the feeble continua- 
tions of the axial ribs which become evanescent before reaching the 
middle of the base and numerous very fine spiral striations which 
are also present on the spire. Aperture broadly oval ; posterior an- 
gle acute; outer lip thin showing the external sculpture within; 
inner lip decidedly oblique, slender and somewhat revolute; parie- 
tal wall glazed with a very thin callus. 
The type and 7 specimens, Cat. No. 268754 U.S.N.M.,were obtained 
by the U. S. Bureau of Fisheries at Northwest Point, Elliott Bay, 
Seattle, Washington. The type consists of the last 5 postnuclear 
whorls and measures — length, 4 mm. ; diameter, 1.5 mm. 
TURBONILLA (PYRGOLAMPROS) TREMPERI. new species. 
Plate 44, fig. 7. 
Shell short, elongate conic, pale brown. Nuclear whorls a little 
more than two, decidedly depressed helicoid, having their axis at 
right angles to that of the succeeding turns, in the first of which they 
are about one-fifth immersed. Postnuclear whorls flattened in the 
middle, sloping toward the suture and the almost appressed summit, 
marked by strong lamellar, decidedly retractively slanting, axial ribs, 
of which 12 occur upon the first, 14 upon the second to fourth, 16 
G48 PROCEEDINGS OF THE XATIONAL MUSEUM. vol.52. 
upon the fifth, 18 upon the sixth, and 16 upon the penultimate turn. 
These ribs extend prominently to the summit. Intercostal spaces 
strongly impressed, about 2^ times as wide as the ribs. Suture mod- 
erately constricted. Periphery of the last whorl feebly angulated. 
Base short, ATell rounded, marked by the very feeble continuations of 
the axial ribs, which become evanescent before reaching the umbilical 
chink. Entire surface of the shell marked with fine, closely spaced, 
spiral striations. Aperture oval, posterior angle obtuse; outer lip 
thick ; inner lip thick, almost straight, and slightly revolute ; parietal 
wall covered by a thin callus. 
The type. Cat. No. 250629, U.S.N.M., was collected by Mr. Gripp 
on kelp, in 15 fathoms, outside of San Diego Bay. It measures — 
length, 4.7 mm. ; diameter, 1.2 mm. 
TURBONILLA (PYRGISCULUS) GUILLENI, now species. 
Plate 44, fig. 5. 
Shell conic, milk white. Nuclear whorls 2|, well rounded, form- 
ing a depressed helicoid spire, the axis of which is at right angles 
to that of the succeeding turns, in the first of which it is about one- 
third immersed. Postnuclear whorls somewhat inflated, well rounded, 
almost appressed at the summit, marked on each whorl by 18 narrow, 
well developed, rounded, almost vertical axial ribs. Some of these 
ribs are developed into varices and these are distributed at irregular 
intervals. Intercostal spaces about 2^ times as wide as the ribs, 
crossed by three spiral series of strong pits, of which one is at the 
periphery, the second a little anterior to the middle and the third 
about two-fifths of the space between this and the summit posterior 
to the median pit. In addition to these pits the intercostal spaces are 
crossed by many almost equally strong incised spiral lines of which 
12 occur between the summit and the first pit, 7 between the first and 
median pit, and 8 between the median and peripheral pit. Suture 
quite strongly constricted. Periphery of the last whorl well rounded. 
Base moderately long, attenuated, marked by the feeble continuations 
of the axial ribs and numerous incised spiral lines of a little wider 
spacing than the fine sculpture on the spire. Aperture rissoid, oval ; 
posterior angle obtuse; outer lip thick; inner lip short, curved, re- 
flected over and appressed to the base; parietal wall covered with a 
thick callus. 
The type. Cat. No. 267736, U.S.N.M., was dredged in shallow water 
in Santa Maria Bay, Lower California. It has five postnuclear 
whorls and measures — length, 3 mm. ; diameter, 1 mm. 
NO. 2193. WEST AMERICAN MARINE M6LLU8K8—BART8CH. 649 
TURBONILLA (PYRGISCUS) DORA, new species. 
Plate 42, fig. 10. 
Shell very large, elongate conic, uniformly pale brown. Nuclear 
whorls decollated. Postnuclear whorls well rounded, strongly ap- 
pressed at the summit, marked on the early whorls by rather strong, 
almost vertical, axial ribs, which become evanescent on the later 
turns. Of these ribs 18 occur upon the first to fourth, 20 upon the 
fifth, 22 upon the sixth, 24 upon the seventh, 26 upon the eighth, 32 
upon the ninth, and 34 upon the tenth, while upon the penultimate 
whorl they become too enfeebled to be counted. The spiral sculpture 
consists of broad pits and feebly incised lines, the posterior fifth 
between the sutures being marked by six very fine, subequally spaced, 
spiral striations. These are followed by tvv'o stronger lines, which 
are succeeded by two strongly impressed pits, these are followed by 
a pit about half as wide as the last two, then by one a little stronger 
and finer, then by the widest pit of all, which is succeeded by one not 
quite as broad. These incised spiral lines pass up on and even cross 
the summit of the enfeebled ribs. Suture moderately constricted. 
Periphery of the last whorl decidedly inflated. Base moderately 
long, somewhat inflated, well rounded, marked by about 25, some- 
what wavy, more or less regular, spiral grooves of somewhat vary- 
ing width, which inclose spaces betAveen them of a width about equal 
to the grooves, the space between the first of these and the last on the 
spire is a rather wide band, devoid of sculpture, excepting the fine 
spiral striations, which cover the entire surface of the shell, in addi- 
tion to the coarser sculpture already described. Aperture small, sub- 
quadrate, posterior angle obtuse; outer lip moderately strong; inner 
lip oblique, straight and slightly reflected; parietal wall covered by 
a thick callus. 
The type, Cat. No. 250626, U.S.N.M., was collected by Mr. Gripp 
on kelp, in 15 fathoms, off San Diego Bay. It is minus the nucleus. 
The 13 remaining whorls measure — length, 13.8 mm.; diameter, 3.2 
mm. 
TURBONILLA (PYRGISCUS) INA, new species. 
Plate 44. fig. 10. 
Shell broadly, elongate-conic, bright brown, excepting the nucleus, 
which is white. Nuclear whorls, two and one-half, planorboid, hav- 
ing their axis almost at right angles to that of the succeeding turns, 
in the first of which they are about one-third immersed. Post- 
nuclear whorls feebly rounded, appressed at the summit, marked by 
rather feeble, almost vertical, axial ribs, of which 18 occur upon the 
second and third, 20 upon the fourth and fifth, and 22 upon the re- 
maining whorls. Intercostal spaces feebly impressed, about as 
650 PROCEEDINGS OP THE NATIONAL MUSEUM. vol.52. 
wide as the ribs, crossed by eleven incised spiral lines between the 
sutures, of these the fifth is the widest, being fully twice as wide as 
the third and sixth, which are of equal strength, the remaining are 
much more slender and also of equal strength. In spacing the first 
is about as far anterior to the summit as the second is distant from 
the third, or the fourth from the fifth, or the fifth from the sixth, 
while the space between the first and second, and those between the 
sixth and the seventh, are about equal, the spiral markings pass up 
on the sides of the ribs and the stronger ones tend to cross their 
summit. Suture moderately constricted. Periphery of the last 
whorl decidedly angulated. Base short, slightly rounded, marked 
by the very feeble continuations of the axial ribs, which become 
evanescent before reaching the middle of the whorls, and thirteen in- 
cised spiral lines, which are about equally spaced, the first one below 
the periphery being a little nearer to its neighbor than the spacing be- 
tween the rest, the space between the seventh line of the spire and the 
first incised spiral basal line is a broad, smooth band. Aperture sub- 
quadrate, posterior angle obtuse; outer lip thin, showing the ex- 
ternal sculpture within; inner lip almost straight and slightly revo- 
lute ; parietal wall covered with a thin callus. 
The type. Cat. No. 250625, U.S.N.M., was collected by Mr. Gripp 
on kelp, in 15 fathoms, off San Diego Bay. It has eight and one- 
half postnuclear whorls, and measures — length, 6.1 mm. ; diameter 
1.9 mm. 
TURBONILLA (PYRGISCUS) ISTA. new species. 
Plate 42, fig. 6. 
Shell rather large, elongate conic, light brown. Early whorls light 
yellow. Nuclear whorls decollated. Postnuclear whorls appressed 
at the summit, which is slightly excurved, marked by rather poorly 
developed, almost vertical, axial ribs, which become obsolete on the 
later whorls. Of these ribs, 18 occur upon the second and third, 20 
upon the fourth, 22 upon the fifth, 24 upon the sixth, 26 upon the 
seventh, 28 upon the eighth, 30 upon the ninth, and 32 upon the 
tenth, while upon the penultimate they are too irregular to be 
counted. Intercostal spaces very feebly impressed, about as wide as 
the ribs. The spiral sculpture consists of strong and weak incised 
lines, the strong lines pass strongly upon the sides of the ribs and 
even cross the summit; the first of these strong lines is about one- 
fifth of the distance between the summit and the suture anterior to 
the summit, while the spaces between the first and second, the third 
and fourth, the fourth and fifth, and the fifth and sixth are almost 
equal and about two-thirds as wide as that between the second and 
third ; of the finely incised spiral lines eight occur between the sum- 
mit and the first strong line and three between the first and second, 
NO. 2193. WEST AMERICAN MARINE M0LLUSK8—BART8CU. 651 
the anterior member of these three being much stronger than the 
other two; there are also three between the second and third, the 
last two of these being closer spaced than the first two ; no fine lines 
are apparent betAveen the other strong lines. Suture slightly con- 
stricted. Periphery of the last whorl strongly inflated. Base short, 
well rounded, marked by the feeble continuations of the axial ribs 
and 22 wavy incised lines, which are of varying width and spac- 
ing. iVperture moderately large, subquadrate, posterior angle ob- 
tuse; outer lip thin, showing the external sculpture wdthin; inner lip 
oblique, straight, slightly revolute; parietal wall glazed with a 
moderately thick callus. 
The type. Cat. No. 25062T, U.S.N.M., was dredged by Mr. Gripp, 
in 15 fathoms, on kelp off San Diego Bay. It has lost the nucleus. 
The 11| whorls remaining measure— length, 12.5 mm.; diameter, 
2.8 mm. 
TURBONILLA (PYRGISCUS) EVA. new species. 
Plate 44. fig. 6. 
Shell small, elongate conic, of pale brown ground color, with the 
incised spiral lines red. Nuclear whorls decollated. Postnuclear 
whorls gently rounded, on the posterior three-quarters of the shell 
sloping more abruptly toward the suture, marked by moderately 
strong, well-rounded, almost vertical axial ribs, of which 22 occur 
upon the third and fourth, 24 upon the fifth, and 26 upon the penulti- 
mate turn. Intercostal spaces a little narrower than the ribs, crossed 
by 11 strongly incised spiral grooves, which are of varying width. 
Of these the fourth, seventh, and eleventh are of equal strength and 
much wider than any of the rest ; the remaining, with the exceptioii 
of the sixth, which is a mere incised line, are of almost equal strength. 
In spacing the first is about as far below the summit as that is dis- 
tant from the second, and these two spaces are a little wider than 
the spaces between the third and fourth, the fifth and sixth, and the 
seventh and eighth, which are equal and follow next in strength, the 
remaining spaces are subequal and a little narrower. Suture quite 
strongly constricted. Periphery of the last whorl inflated, well 
rounded. Base moderately long, well rounded, marked by the feeble 
continuations of the axial ribs, which become evanescent before 
reaching the middle of the base, and 1?> subequally spaced incised 
spiral lines, of which the first three below the periphery are inter- 
rupted by the ribs. Aperture oval, posterior angle obtuse ; outer lip 
very thin; inner lip slightly curved, reflected over and appressed to 
the base ; parietal wall covered with a thin callus. 
The type. Cat. No. 250630, U.S.N.M., was dredged by Mr. Gripp, 
on kelp, in 15 fathoms, off San Diego Bay. It has lost the nucleus. 
The seven whorls remaining measure — length, 4.3 mm.; diameter, 
1.2 mm. 
652 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 
TURBONILLA (PYRGISCUS) ALMEJASENSIS. new species. 
Plate 45, fig. 10. 
Shell slender, elongate conic, milk white. Xuclear whorls decol- 
lated in the type (see end of description for this character). The 
early postnuclear whorls are flattened, the later ones well rounded; 
all have the summit feel)ly shouldered. The whorls are ornamented 
by very regular well rounded axial ribs which become somewhat en- 
feebled toward the summit. These ribs have a decided protractive 
slant on the early whorls, while on the middle turns they are ver- 
tical, and on the later volutions they have a decidedly retractive 
slant; here, too, they are a little less strong and less regular and 
much more closely spaced. Of these ribs 18 occur upon the first four 
of the remaining turns, 20 upon the fifth, 22 upon the sixth, 24 upon 
the seventh, 28 upon the eighth, 34: upon the ninth, 36 upon the 
tenth, and about 52 upon the last turn. Intercostal spaces a little 
narrower than the ribs, marked by 15 fairly equal and equally spaced 
spiral series of pits, which are about as wide as the spaces that sepa- 
rate them. Of these pits the first is about one-twelfth the distance 
between the first basal line and the peripheral series of pits anterior 
to the summit. On the last whorl, where the axial ribs become de- 
cidedly enfeebled, the combination of the axial and raised spiral 
sculpture gives to the surface a thimble pitted appearance. Suture 
of the early whorls slightly and of the later strongly constricted. 
Periphery of the last whorl well rounded. Base attenuated, marked 
by the very feeble continuations of the axial ribs, and 12 incised 
spiral lines, which are of irregular strength and spacing. Aperture 
broadly oval ; posterior angle acute ; outer lip thin ; inner lip slightly 
curved, decidedly oblique, revolute, and appressed to the attenu- 
ated base for almost its entire length, provided with a strong very 
oblique fold at its insertion; parietal wall covered by a very thick 
callus. 
The type, Cat. No. 266535, U.S.N.M., was dredged in shallow water 
in Almejas Bay, which is really the southern arm of Magdalena Bay, 
Lower California. The type had lost the nucleus and probably the 
first postnuclear turn, the 12 whorls remaining measure — length, 
8 mm.; diameter, 1.1 mm. Cat. No. 267717 contains two additional 
specimens dredged in shallow water in Santa Maria Bay, Lower 
California. From these we are able to add a description of the 
nucleus. Nuclear whorls 2|, well rounded, forming a moderately 
elevated spire, the axis of which is at right angles to that of the 
succeeding turns, in the first of which the tilted spire is one-fifth 
immersed. 
% 
NO. 2193. WE82' AMERICAN 3IARIXE M0LLU8K8—BARTSCH. 653 
TURBONILLA (PYRGISCUS) BARTOLOMENSIS, new species. 
Phite 45, fig. 5. 
Shell conic, yellow. Nuclear whorls decollated. Postnuclear whorls 
appressed at the summit, flattened in the middle, except the last, 
which is inflated and strongly rounded. The whorls are marked by 
rather strong, well-rounded axial ribs, which are slightly retrac- 
tively slanting on the early turns and decidedly so on the later 
volutions. Intercostal spaces about as wide as the ribs marked by 
12 deeply incised spiral pits. Of these the fifth is a mere line, while 
the first four, the sixth, ninth, and tenth are about twice as wide, 
and the eighth and ninth and eleventh and twelfth form deep broad 
pits fully three times the width of the last. Suture moderately con- 
stricted. Periphery of the last whorl strongly inflated, well rounded. 
Base short, inflated, well rounded, marked by the continuations of 
the axial ribs, which extend strongly to the umbilical area, between 
which poorly defined spiral striations may be seen. Aperture short, 
broadly oval, posterior angle obtuse; outer lip thin, showing the 
external sculpture within ; inner lip short, partly reflected, free, pro- 
vided with an obsolete oblique internal fold at its insertion ; parietal 
wall covered by a very thick callus, which renders the peristome 
complete. 
The type. Cat. No. 268729, U.S.N.M., was dredged in shallow 
water in San Bartolome Bay, Lower California. It has lost the 
nucleus, the nine postnuclear whorls measure — length, 5.6 mm.; 
diameter, 1.6 mm. 
This special resembles Tii^^honilla (Pyrgiscus) duricoifna Dall and 
Bartsch in having the inflated last whorl and the reddish incised 
spiral lines, but differs markedl}^ from it in shape and sculpture. 
TURBONILLA (PYRGISCUS) LAMNA. new Bpedes. 
Plate 43, fig. 1. 
Shell regularly, broadly elongate conic, j'^ellowish white. Nuclear 
whorls 2^ smooth, forming a decidedly depressed helicoid spire, the 
axis of which is at right angles to that of the succeeding turns in 
the first of which about one-fourth of the side of the spire is im- 
mersed. Postnuclear whorls well rounded, appressed at the summit, 
ornamented by weak, distantly spaced, somewhat protractive axial 
ribs, which become flattened and decidedly enfeebled near the sum- 
mit. Of these ribs 20 occur upon the first and 18 upon the re- 
maining turns. Intercostal spaces about three times as wide as 
the ribs, shallow, crossed by 13 slender incised spiral lines of some- 
what varying width. Of these lines the first to fifth, seventh and 
twelfth are mere incised lines, while the sixth, eighth, tenth, and 
654 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 
eleventh are about twice as wide as these, and the ninth and thir- 
teenth are double the width of the last. The space between the 
summit and the first is as wide as the space between the eighth and 
ninth, which is doubly as wide as that separating the first five lines, 
which are subequally spaced. The spaces between the eighth and 
ninth, ninth and tenth, tenth and eleventh, and eleventh and twelfth 
increase steadily in width, the space between the first of this series 
being about one-half as wide as that separating the last. Suture 
moderately constricted. Periphery of the last whorl angulated. Base 
short, well rounded, marked by the feeble continuations of the axial 
ribs, which become evanescent before reaching the middle of the 
base, and 12 feebly incised, slender, wavy, spiral striations, which 
become successivelj'' weaker and closer spaced from the periphery 
toward the umbilical area. Aperture subquadrate; posterior angle 
obtuse; outer lip thin; inner lip slender, slightly twisted, provided 
with a very oblique fold a little anterior to its insertion; parietal 
Avail glazed with a thin callus. 
The type and an additional specimen, Cat. No. 268625 U.S.N.M. 
was dredged along the shore of Santa Maria Bay, Lower California. 
It has 8^ postnuclear whorls and measures — length, 5.2 mm.; di- 
ameter, 1.6 mm. 
TURBONILLA (PYRGISCUS) MARIANA, new species. 
Plate 45, fig. 9. 
Shell very slender, elongate conic, light honi yellow with the 
anterior half of the base and a narrow band about one-fifth of the 
width of the space between the sutures pale brown. The band is 
situated about its own width posterior to the periphery. Nuclear 
whorls decollated. Postnuclear whorls flattened very high between 
the sutures, narrowly shouldered at the summit, marked by closely 
crowded, quite regular, vvell rounded, almost straight, slightly pro- 
tractive axial ribs of which 18 occur upon the first four of the re- 
maining turns; 20 upon the fifth to seventh; 22 upon the eighth, and 
26 upon the penultimate whorl. Intercostal spaces a little narrower 
than the ribs, marked by 13 strongly incised, subequal and subequally 
spaced pits. Suture moderately constricted. Periphery of the last 
whorl well rounded. Base attenuated, well rounded, marked by the 
feeble continuation of the ribs which reach to the umbilical chink 
and five equal and equally spaced, moderately broad, shallow, incised 
lines of a rust brown color. Aperture elongate oval ; posterior angle 
acute; outer lip thin, showing the external sculpture within; inner 
lip slender, moderately curved, reflected over and adnate to the 
attenuated base for two-thirds of its length and pro^^ded with a 
strong oblique fold at its insertion ; parietal wall covered by a thick 
callus. 
% 
NO. 2193. WEST AMERICAN MARINE M0LLUSKS—BART8CH. 655 
The type, Cat. No. 267722^, U.S.N.M., was dredged in shallow 
water in Santa Maria Bay, Lower California. It has lost the nucleus 
and probably the first two postnuclear turns; the nine and a half 
remaining whorls measure — length, 5.9 mm. ; diameter, 1 mm. 
TURBONILLA (PYRGISCUS) LAZAROENSIS, new species. 
Plate 45, fig. 11. 
Shell extremely slender, elongate conic, milk-white. Nuclear 
whorls decollated, Postnuclear whorls flattened, very high between 
the sutures, slightly excurved immediately below the feebly shoul- 
dered summit, and marked by very regular and regularly spaced 
well rounded, slightly protractive axial ribs of which 20 occur upon 
all the remaining turns excepting the last two. Of these the penulti- 
mate has 24 and the last 32. Intercostal spaces a little narrower than 
the ribs, marked by 17 spiral series of pits of which the first 16 are 
subequal and subequally spaced. The last, the peripheral pit is a 
little wider than the rest and separated from the sixteenth by a space 
about five times as wide as those separating the other pits. The first 
pit is about as far anterior to the summit as the sixteenth is distant 
from the seventeenth. Suture slightly contracted. Periphery of the 
last whorl well rounded. Base attenuated marked by the very feeble 
continuation of the axial ribs and eight wavy incised spiral lines 
which are of about the same strength but not of equal spacing. A 
broad band separates the peripheral line of pits from the first basal 
line; the next three lines are closely and equally spaced, while the 
fourth is a little farther from the third than that is from the second 
and the distance between the fourth and fifth is in equal proportions 
greater than that between the third and fourth. The rest are again 
narrowly and about equally spaced. Aperture elongate oval; pos- 
terior angle acute; outer lip thin showing the external sculpture 
within by transmitted light: inner lip slightly curved reflected and 
appressed to the attenuated base for almost its entire length, pro- 
vided with a very oblique, strong fold at its insertion ; parietal wall 
glazed by a thin callus. 
The type. Cat. No. 267742 U.S.N.M., was dredged in shallow 
water off Lazaro Point, Santa Maria Bay, Lower California. It has 
lost the nucleus and probably the first 3 postnuclear turns, the 9^ 
remaining measure — length, 5.8 mm. ; diameter, 0.85 mm. 
This species is nearest related to Turhonilla {Pyrgiscus) mariana 
Bartsch from which it differs by its much more slender forai and 
spiral sculpture. 
656 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 
TURBONILLA (PYRGISCUS) CORTEZI, new species. 
Plate 45, fig. 12 ; plate 42, fig. 7. 
Shell rather large, elongate conic, pale yellowish brown. Xiiclear 
whorls 2^, well rounded, formi ng a decidedly depressed helicoid spire, 
the axis of which is at right angles to that of the succeeding turns 
in the first of which the tilted edge is about one-fifth immersed. 
Early postnuclear whorls well rounded, the later ones almost flat- 
tened, all appressed at the summit and marked by slender, well- 
roimded, low, decidedly retractive axial ribs, of which 24 occur upon 
the first four turns, 22 upon the fifth and sixth, 26 upon the penulti- 
mate, and 30 upon the last turn. These ribs become somewhat en- 
feebled and expanded toward the summit. Intercostal spaces about 
two times as wide as the ribs, crossed by seven spiral series of pits, 
of which the second, third, sixth, and seventh are equal and stronger 
than the rest; the other three being about half as wide and equal. 
In addition to the above sculpture the entire spire is marked by fine 
incremental lines and equally fine spiral striations, the com- 
binations of which give to the surface a clothlike texture. 
Suture feebly impressed. Periphery of the last whorl well rounded. 
Base moderately long, strongly rounded, marked by incremen- 
tal lines and 8 rather broad, somewhat wavy, subequal, and 
subequally spaced spiral lines. The white color of these and the 
incised stronger lines on the spire stand out in marked contrast to 
the ground color. Aperture elongate oval ; slightly effuse anteriorly ; 
posterior angle acute ; outer lip thin, showing the external sculpture 
within; inner lip almost straight, slightly revolute; parietal wall 
glazed with a thin callus. 
The type and two additional specimens. Cat. No. 267722, 
U.S.N.M., were dredged in shallow water in Santa Maria Bay, Lower 
California. The type is an adolescent specimen and has 8f post- 
nuclear turns, and measures — length, 6.5 mm. ; diameter, 1.9 mm. 
One of the other specimens is adult, but has lost the nucleus and 
probably the first three postnuclear turns. The eight remaining 
measure— length, 8.3 mm.; diameter, 2.5 mm. This specimen also 
enables us to say that the last whorl is inflated and that the axial 
ribs become obsolete on this turn. 
TURBONILLA (PYRGISCUS) TECALCO, new species. 
Plate 45, fig. 4. 
Shell broadly elongate conic, milk white. Nuclear whorls 2^, well 
rounded, forming a decidedly depressed helicoid spire, having its 
axis at right angles to that of the succeeding turns, in the first of which 
it is about one-fourth immersed. Postnuclear whorls flattened in the 
middle, weakly rounded at the summit, marked by very regular, 
NO. 2193. WEST AMERICAN MARINE MOLLUSKS—BARTSCH. 657 
well-rounded, narrow, almost straight, slightly protraetive axial 
ribs, of which 18 occur upon all the turns. Intercostal spaces about 
2^ times as wide as the ribs, crossed by 9 incised spiral lines, of which 
the third and ninth are equal, and fully doubly as wide as the sec- 
ond, fourth, and eighth, which are also equal, the rest being well- 
incised, slender striations. In spacing the first is about as far an- 
terior to the summit as it is distant from the second, and the second 
is an equal distance from the third; the third, fourth, eighth, and 
ninth have about the same spacing, while the space between the 
fourth and fifth and seventh and eighth is only about one-half as 
wide, the combined spaces between the fifth and seventh are about 
equal to one of the spaces of the last-mentioned group, the sixth 
spiral giving a little wider spacing to the area between the fifth and 
sixth than the sixth and seventh. Suture moderately constricted. 
Periphery of the last whorl obtusely angulated. Base short, well 
rounded, marked by the feeble continuations of the axial ribs, which 
become evanescent on its middle, and nine very slender and almost 
equall}^ spaced, incised lines. Aperture subquadrate. Posterior 
angle obtuse (outer lip badly fractured) ; inner lip very thick and 
provided with a strong oblique fold a little anterior to its insertion ; 
parietal wall glazed with a thin callus. 
The type, an adolescent specimen, Cat. No. 268731, U.S.N.M., was 
dredged by the U. S. Bureau of Fisheries steamer Albatross at sta- 
tion 5678 off Redondo Point, Magdalena Bay, Lower California, in 
ISi fathoms, on broken-sliell bottom. It has 7^ postnuclear whorls 
and measures — length, 3.9 mm. ; diameter, 1.25 mm. Cat. No. 267743, 
U.S.N.M., contains an adult specimen dredged in shallow water in 
Santa Maria Bay, Lower California, which has lost the nucleus and 
probably the first three postnuclear turns, the 7^ remaining meas- 
ure — length, 5.3 mm.; diameter, 1.8 mm. 
TURBONILLA (PYRGISCUS) CORSOENSIS, new species. 
Plate 45. fig. 8. 
Shell elongate conic, pale yellowish brown. Nuclear whorls 2^, 
well rounded, forming a very depressed helicoid spire, the axis of 
which is at right angles to that of the succeeding turns in the first of 
which it is about one-fourth immersed. Postnuclear whorls flattened 
in the middle, slightly shouldered at the summit, marked by rather 
low, narrow, well-rounded, slightly retractively slanting axial ribs, 
of which 18 occur upon the first, 16 upon the second to fourth, and 18 
upon the remaining turns. The ribs become slightly flattened and en- 
feebled toward the summit. Intercostal spaces about 2^ times as wide 
as' the ribs crossed by nine almost equally spaced incised spiral grooves, 
the first of which is about as far anterior to the summit as that is 
65008°— Proc.N.M. vol.52— 17 42 
658 PROCEEDINGS OF THE XATIOXAL MUSEUM. vol.52. 
distant from the second. Of these lines the first and second are the 
weakest, while the fourth and ninth are the strongest, the rest being 
intermediate. In addition to this sculpture there are many fine in- 
cremental lines and equally fine spiral striations on the spire which 
give the surface a fine clothlike texture. Suture well impressed. 
Periphery of the last whorl well rounded. Base short, strongly 
rounded, marked by the feeble continuations of the axial ribs, which 
become evanescent before reaching its middle, and eight almost equal 
and equally spaced incised spiral lines. Aperture broadly oval; 
posterior angle acute; outer lip thin, showing the external sculpture 
within; inner lip almost straight, oblique, somewhat revolute, and 
provided with a strong fold a little anterior to its insertion ; parietal 
wall covered with a thick callus. 
The type and four additional specimens, Cat. No. 267722a, 
U.S.N.M., were dredged in shallow water in Santa Maria Bay, Lower 
California. The type has 9| postnuclear whorls and measures — 
length, 6,1 mm. ; diameter, 1.7 mm. Cat. No. 268730, U.S.N.M., con- 
tains another specimen dredged by the U. S. Bureau of Fislieries 
steamer Albatross at station 5678 off Eedondo Point, Magdalena Bay, 
Lower California. 
TURBONILLA (PYRGISCUS) BAEGERTI, new species. 
Plate 45, fig. 2. 
Shell elongate conic, light yellow horn colored. Nuclear whorls 
2^, well rounded, forming a decidedly depressed helicoid spire, 
the axis of which is at right angles to that of the succeeding 
whorls, in the first of which the tilted edge of the nucleus is about 
one-fifth immersed. Postnuclear whorls flattened, slopingly shoul- 
dred toward the summit, marked by distinctly spaced, well-rounded, 
XQYj regular, slightly retractively slanting axial ribs of which 18 
occur upon the first five and 20 upon the remaining turns. These ribs 
become decidedly enfeebled and somewhat flattened toward the sum- 
mit. Intercostal spaces about twice as wide as the ribs crossed by 
12 incised spiral lines of which the first to fourth, and the sixth, 
ninth, and tenth are mere striations while the fifth, seventh, eighth, 
eleventh, and twelfth are subequal and much stronger. The widest 
space is between the tenth and eleventh line, the rest of the spacing 
is subequal, excepting the first four lines below the summit, which are 
a little more closely crowded. Suture strongly constricted. Periph- 
ery of the last whorl well rounded. Base short, well roimded, marked 
by the feeble continuation of the axial ribs which become evanescent 
before reaching the middle of the base and 16 rather closely crowded 
finely incised spiral lines, the first of which is considerably anterior 
to the first series of supraperipheral pits. Aperture large, broadly 
NO. 2193. WEST AMERICAN MARINE M0LLU8K8—BARTSCH. 659 
oval; posterior angle obtuse; outer lip thin, showing the external 
sculpture within; inner lip stout, slightly curved and somewhat 
revolute, provided with a moderately strong oblique fold a little an- 
terior to its insertion. Parietal wall covered with a thin callus. 
The type, Cat. No. 267744«, U.S.N.M., was collected in shallow 
water in Santa Maria Bay, Lower California. It has nine post- 
nuclear whorls and measures — length, 4.8 mm. ; diameter, 1.4 mm. 
TURBONILLA (PYRGISCUS) ULLOA, new species. 
Plate 43, fig. 4. 
Shell elongate conic, yellowish white. Nuclear whorls and all but 
the last 5| postnuclear turns decollated. The whorls remaining are 
flattened, almost appressed at the summit, marked b}' 18 quite regular, 
slightly protractivel}^ slanting, well-rounded axial ribs. Intercostal 
spaces shallov>', about two times as wide as the ribs, crossed by eight 
incised spiral grooves, of which the second, third, seventh, and eighth 
are of equal width and much stronger than the rest; the remaining 
four are also of equal width, but only about one-fourth as wide as the 
rest. The spaces between the first and second and second and third 
are equal and almost doubly as wide as those between the summit and 
the first, the third and fourth, and sixth and seventh ; the space be- 
tween the seventh and eighth is a trifle narrower than the last men- 
tioned, and those between the fourth and fifth and fifth and sixth 
are a little less wide than this. Suture moderately constricted. 
Periphery of the last whorl well rounded. Base moderately long, 
well rounded, marked by the feeble continuations of the axial ribs, 
which become evanescent before reaching the middle of the base, 
and 11 strongly incised subequally spaced lines. These is a broad 
smooth band below the periphery equal to the space between the first 
and second incised line on the spire of the last whorl. Aperture 
broadly oval, posterior angle acute; outer lip thin, showing the ex- 
ternal sculpture within ; inner lip slender, very oblique, and decidedly 
revolute, provided with a moderately strong fold immediately below^ 
the insertion ; parietal wall covered by a thick callus. 
The type. Cat. No. 267744e, U.S.N.M., was dredged in shallow 
water in Santa Maria Bay, Lower California. It consists of a little 
more than the last five whorls and measures — length, 4 mm. ; diam- 
eter, 1.2 mm. 
TURBONILLA (PYRGISCUS) CABRILLOI. new species. 
Plate 45, fig. 3. 
Shell broadly elongate conic, pale yellow horn colored. Nuclear 
whorls 2^, well rounded, forming a decidedly depressed helicoid spire 
having its axis at right angles to that of the succeeding whorls, in 
the first of which, the tilted edge is about one-fourth immersed. 
660 PROCEEDINOS OF THE NATIONAL MUSEUM. vol.52. 
Postnuclear whorls strongly roundly shouldered at the summit, flat- 
tened in the middle, crossed by strong sublamellar, slightly protrac- 
tively slanting axial ribs, of which 16 occur upon the first and second 
and 18 upon the remaining turns, excepting the last, which has 20. 
Intercostal spaces about one and one-half times as wide as the ribs, 
crossed by 11 incised spiral lines, of which the first three are mere 
striations, while the fourth and the peripheral are wider than the 
rest, which are about half their width. Suture rather strongly con- 
stricted. Periphery of the last whorl well rounded. Base short, 
narrowly umbilicated, marked by the feeble continuations of the axial 
ribs, which become evanescent before reaching the middle of the 
base and seven equal incised spiral lines, of which the first three 
occupy about as much space as that separating the third from the 
fourth; the rest become successively closer spaced anteriorly. The 
space between the first basal line and the peripheral pit is a very 
broad smooth band. Aperture very broadly oval; posterior angle 
acute; outer lip thin, showing the external sculpture within; inner 
lip thin, slightly curved and somewhat revolute, provided with a 
weak oblique fold at its insertion; parietal wall covered with a thick 
callus. 
The type. Cat. No. 268T33 U.S.N.M., was dredged by the U. S. 
Bureau of Fisheries steamer Albatross at station 5678 off Redondo 
Point, Magdalena Bay, Lower California, in 13| fathoms, on broken- 
shell bottom. It has 9J postnuclear whorls and measures — length, 
5.5 mm. ; diameter, 1,6 mm. 
TURBONIIiLA (CINGULINA) URDENETA, new species. 
Plate 45, fig. 1. 
Shell elongate-conic, yellowish white, semi-translucent. Nuclear 
whorls deeply obliquely immersed in the first of the succeeeding turns 
above which only the tilted edge of the last volution projects. Post- 
nuclear whorls well rounded, the first smooth, the second with 2, 
and the next three with 3 spiral keels, while the rest have 4 between 
the summit and the suture. The summits of the whorls are feebly 
shouldered; the first spiral keels fall on the anterior termination of 
the posterior third of the whorls between the summit and the suture, 
the space between the summit and this keel being concave. The 
second and third keels are as strong as the first and are separated 
from each other by a space a little more than half the width of that 
between the first and the summit, while the fourth keel is separated 
from the third by only half that space. The entire surface of the 
spire, excepting the summit of the keels is crossed by numerous 
closely spaced very slender axial threads and microscopic spiral 
striations. Suture strongly constricted. Periphery well rounded. 
NO. 2193. WEST AMERICAN MARINE M0LLU8KS—BART8CH. 6G1 
Base moderately long, well rounded, marked by the fine axial incre- 
mental threads, and closely spaced, fine, Avavy, spiral striations. Aper- 
ture broadly oval, somewhat effuse anteriorly ; posterior angle acute ; 
outer lip thin showing the external sculpture within and rendered 
sinuous at the edge by the strong markings; inner lip very slender, 
strongly curved, reflected over, and appressed to the base for half its 
length ; parietal wall covered by a thin callus. 
The type, and 42 specimens, Cat. No. 267740, were dredged in shal- 
low water in Santa Maria Bay, Lower California. The type has 8^ 
postnuclear whorls and measures — length, 5.7 mm.; diameter, 1.5 
mm. Cat. No. 266536 U.S.N.M. contains another specimen dredged 
in shallow water in Magdalena Bay, Lower California, and Cat. 
No. 268640 U.S.N.M. contains three dredged by the U. S. Bureau of 
Fisheries steamer Alhafross at station 5678, off Redondo Point, 
Magdalena Bay, Lower California, in 13| fathoms on broken shell 
bottom. 
TURBONILLA (MORMULA) SEBASTIANI. new species. 
Plate 42, fig. 9. 
Shell large, elongate-conic, pale brown. Nuclear whorls 2|, de- 
cidedly depressed helicoid, having their axis at right angles to that 
of the succeeding turns, in the first of which the tilted edge is about 
one- fourth immersed. Postnuclear whorls well rounded, almost ap- 
pressed at the summit, crossed by well-rounded, sublamellar, slightly 
l^rotractively slanting axial ribs, of which 18 occur upon the first, 
16 upon the second to seventh, 18 upon the eighth to tenth, and 20 
upon the remaining turns. In addition to the axial ribs the whorls 
are marked at irregular intervals by rather ill-defined varices. 
Intercostal spaces about three times as wide as the ribs crossed by 
14 incised spiral lines, of which the fourth, sixth, and fourteenth are 
equal and much stronger than the rest. These are followed by the 
second, eighth, eleventh, and thirteenth, which are also of equal 
width but only about half as wide. The rest are also subequal and 
about half as strong as the last named series. Suture moderately con- 
stricted. Periphery obscurely angulated. Base short, well-rounded, 
marked only by incremental lines and eight strong, incised, spiral 
lines which decrease successively in spacing from the periphery ante- 
riorly. Aperture small, subquadrate; posterior angle obtuse; outer 
lip very thick, reenforced within by three spiral lamellae of which 
the posterior two are very strong while the anterior one is feeble. 
The median fold is about opposite the periphery of the last whorl, 
while the posterior divides the space between this and the posterior 
angle of the aperture in two equal parts. The anterior is a trifle 
farther from the median than that is from the posterior fold. Inner 
662 PROCEEDING.^ OF THE NATIONAL MUSEUM. vol.52. 
lip very thick, almost straight, provided with an obscure, very oblique 
fold a little anterior to its insertion; parietal wall glazed by a thin 
callus. 
The type Cat. No. 268634 U.S.N.M. was dredged by the U. S. 
Bureau of Fisheries steamer Albatross at station 5678, off Redondo 
Point, Magdalena Bay, Lower California. It has 14 postnuclear 
whorls and measures — length, 10 mm. ; diameter, 2 mm. 
Ugartea, new subgenus. 
TurhoniUas with a fold on the parietal wall. 
Tyi)e. — Turhonilla {Ugartea) juani Bartsch. 
TURBONILLA (UGARTEA) JUANI. new species. 
Plate 43, fig. 5. 
Shell broadly elongate conic, bluish white. Nuclear whorls at least 
2, planorboid, having their axis almost at right angles to that of the 
succeeding turns, in the first of which they are about half immersed. 
Postnuclear whorls appressed at the summit with a strong sloping 
shoulder, which extends over the posterior fourth of the space be- 
tween the summit and the suture, the rest flattened ; marked by strong, 
rounded, distantly spaced, almost vertical, axial ribs of which 14 
occur upon the first and 12 upon all the remaining, excepting the 
last, which has 14. The ribs form cusps at the anterior angle of the 
shoulder, anterior to which they become enfeebled. Intercostal 
spaces shallow, about 2| times as wide as the ribs, marked by closel}'' 
spaced miscroscopic spiral striations only. Immediately behind the 
aperture on the last turn the ribs become obsolete. Suture moder- 
ately impressed. Periphery of the last whorl rounded. Base pro- 
longed, marked by the continuation of the axial ribs, which become 
evanescent before reaching the middle. Aperture narrowly oval; 
posterior angle acute; outer lip thick within, provided with three 
lamellar denticles on the inner surface; inner lip short, strong de- 
cidedly revolute continuing posteriorly into the very strong parietal 
callus, which becomes disjunct from the preceding whorl at the outer 
edge, which renders the peritreme complete. The inner lip is pro- 
vided with a strong oblique fold at its insertion, while the parietal 
wall bears a short fold about halfway between this and the posterior 
angle of the aperture. 
The type and another specimen. Cat. No. 268638, U.S.N.M., were 
collected by the U. S. Bureau of Fisheries steamer Albatross at sta- 
tion 5G78, off Redondo Point, Magdalena Bay, Lower California in 
13^ fathoms on broken shell bottom. The type has seven postnuclear 
whorls and measures — length, 4.2 mm. ; diameter, 1.3 mm. 
% 
NO. 2193. WEST AMERICAN MARINE MOLLVSKS—BARTSCH. 663 
TURBONILLA (MORMULA) VISCAINOI. new species. 
Plate 43, fig. 3. 
Shell elongate-conic, yellowish-white. Nuclear whorls two, well 
rounded, forming a moderately elevated helicoid spire, the axis of 
which is at right angles to that of the succeeding turns, in the first 
of which the tilted edge is about one-third immersed. Postnuclear 
whorls well rounded, almost appressed at the summit, crossed by 
strong, low, well-rounded, distantly spaced, protractive axial ribs, of 
which 14 occur upon the first and second, IG upon the third to sixth, 
and 18 upon the remaining turns. In addition to the ribs the whorls 
are marked at irregiilar intervals by rather strong varices. Inter- 
costal spaces about three times as wide as the ribs, crossed by five 
spiral pits, wiiich, if the second w^ere a little more anterior, would 
divide the space between the summit and the fifth pit, which is at the 
periphery, into five equal spaces. The spaces between these slender 
pits are crossed by many very fine spiral striations, of which there 
are about 13 between the summit and the first pit, 5 between the first 
and second, 9 between the second and third, 11 between the third 
and fourth, and 6 between the fourth and peripheral pit. Suture 
moderately constricted. Periphery of the last whorl well rounded, 
base short, well rounded, marked by the feeble continuations of the 
axial ribs, which become evanescent before reaching the middle of 
the base and many fine wavy spiral striations which agree with those 
on the spire in strength and spacing. Aperture short, subquadrate, 
posterior angle obtuse; outer lip thin, showing the external sculpture 
w^ithin, reenforced within by four slender spiral lamellae, two of 
which are anterior and two posterior to the periphery; inner lip 
slightly flexuose, almost straight, and somewhat revolute; parietal 
wall glazed with a very thin callus. 
The type Cat. No. 268734 U.S.N.M. was dredged by the U. S. 
Bureau of Fisheries steamer Albatross at station 5678, off Redondo 
Point, Magdalena Bay, Lower California, in 13^ fathoms on broken 
shell bottom. The type has nine postnuclear whorls and measures — • 
length, 4.3 mm. ; diameter, 1.2 mm, 
ODOSTOMIA (CHRYSALLIDA) TARAVALI, new species. 
Plate 46, fig. 3. 
Shell elongate-conic, semitransparent, bluish white. Nuclear 
whorls, at least 2, well rounded, forming a planorboid spire, the axis 
of which is almost at right angles to that of the succeeding turns, in 
the first of which the nuclear spire is about half obliquely immersed. 
Postnuclear whorls flattened, narrowly, tabulatedly shouldered at the 
summit, marked by strong, w-ell-rounded, retractive axial riba, of 
664 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol.52. 
which 18 occur upon the first and 16 upon the remaining whorls, 
except the last, which has 20. These ribs pass f>rominently from the 
shoulder to the peripheral sulcus. In addition to the axial sculpture 
the first 4 turns are crossed by 4 equal and equally spaced, flattened 
spiral cords, which are about as wide as the spaces that separate 
them. On the rest of the turns the subperipheral cord comes into 
the suture and on the penultimate whorl forms a well- developed 
5-spiral cord on the spire. The spaces enclosed by the axial ribs 
and spiral cords are deeply impressed oblong pits, while the junction 
of the ribs and spiral cords form well-rounded tubercles. Suture of 
the early turns, where the fifth spiral is still below the summit of 
the succeeding turn, deeply channeled, less so on the later whorls. 
Periphery of the last turn strongly rounded. Base short, inflated, 
strongly rounded, marked by nine strong, rounded, spiral cords which 
are almost equal and as wide as the spaces that separate them. The 
grooves between these spiral cords are crossed by numerous slender 
axial riblets. Aperture oval; posterior angle obtuse; outer lip thin 
rendered sinuous by the external sculpture ; inner lip slender, thin, 
somewhat revolute, provided with a strong oblique fold at its inser- 
tion. Parietal wall covered by a thin callus. 
The type, Cat. No. 267743« U.S.N.M. was dredged in shallow water 
in Santa Maria Bay, Lower California. It has seven postnuclear 
whorls and measures — length, 3.8 mm. ; diameter, 1.3 mm. 
Another specimen, Cat. No. 268635 U.S.N.M. was dredged by the 
U. S. Bureau of Fisheries steamer Albatross at station 5678, off 
Eedondo Point, Magdalena Bay, Lower California, in 13^ fathoms, 
on broken shell bottom. 
ODOSTOMIA (CHRYSALLIDA) SANTAMARIENSIS, new Bpecies. 
Plate 46, fig. 1. 
Shell stout, oval, yellowish white. Nuclear whorls decollated, the 
pit left in the apex of the type shows that it must have been strongly 
immersed in the first of the postnuclear turns. Postnuclear whorls 
strongly rounded, feebly shouldered at the summit, marked by 
rather slender axial ribs, of which 20 occur upon all the turns. In 
addition to the axial ribs the whorls are marked by 5 spiral cords, 
which are a little stronger than the ribs. The cords are about as 
wide as the spaces that separate them, their junctions with the ribs 
form rounded tubercles, while the spaces inclosed between them are 
strongly impressed concaved pits. Suture not channeled. Base 
rather long, somewhat inflated, well rounded, marked by 10 strong 
spiral cords, which decrease in size gradually and regularly from the 
periphery to the umbilical chink. The grooves between these spiral 
cords, which are about equal to the cords in width, are armed by 
NO. 2193. WEST AMERICAN MARINE M0LLU8E8—BART8CH. 665 
numerous slender axial riblets. Aperture oval, decidedly effuse an- 
teriorly; posterior angle acute; outer lip thin, rendered wavy at the 
edge by the external sculpture; inner lip long, oblique, curved, some- 
what revolute, provided with a strong oblique fold at its insertion; 
parietal wall covered by a moderately thick callus. 
The type. Cat. No. 266180, U.S.N.M., was dredged in shallow 
water in Santa Maria Ba}^ lower California. It has 4^ postnuclear 
whorls and measures, length, 3.5 mm. ; diameter, 1.9 mm. 
ODOSTOMIA (EVALEA) VALEROI, new species. 
Plate 4G, fig. 7. 
Shell ovate, narrowly umbilicated, thin, bluish white. Nuclear 
whorls small, completel}^, deeply, obliquely immersed in the first of 
the succeeding turns. Postnuclear whorls inflated, strongly rounded, 
appressed at the summit, crossed by numerous very fine, closely 
spaced spiral striations. Suture moderately constricted. Periphery 
of the last whorl inflated, well rounded. Base short, inflated, 
strongly rounded, narrowly umbilicated. Aperture broadly oval; 
posterior angle obtuse ; outer lip thin, protracted between the summit 
and periphery to form a claw-like element; inner lip decidedly 
curved, slender, and somewhat revolute, provided with a strong 
oblique fold at its insertion; parietal wall glazed with a thin callus. 
The type and another specimen. Cat. No. 266545, U.S.N.M., were 
dredged in shallow w^ater in Magdalena Bay, lower California. The 
type has five postnuclear whorls and measures, length, 3 mm; diame- 
ter, 1.7 mm. Six additional specimens. Cat. No. 267754, U.S.N.M., 
were dredged in shallow water in Santa Maria Bay, lower California. 
ODOSTOMIA (EVAL'EA) FRANCISCANA, new species. 
Plate 45. fig. 7. 
Shell thin, broadly elongate conic, yellowish white. Nuclear whorls 
small, deeply embedded in the first of the succeeding turns, above 
which the tilted edge of the last volution only projects. Postnuclear 
whorls inflated, well rounded, feebly shouldered at the summit, 
marked by almost vertical, very feeble, incremental lines and ex- 
ceedingly fine, closely spaced, spiral striations. Suture moderately 
constricted. Periphery of the last whorl very feebly angulated. 
Base short, inflated, well rounded, wath a very narrow umbilical 
chink. Aperture large; posterior angle acute; outer lip thin; inner 
lip strongly curved, somewhat reflected and provided with a strong, 
oblique fold at its insertion ; parietal wall glazed with a thin callus. 
The type and three specimens. Cat. No. 214431, U.S.N.M., were 
collected at United States Bureau of Fisheries Station 5729, in San 
666 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 
Francisco Bay, on sticky, nearly black, mud in 4| fathoms. Cat. 
No. 214432, U.S.N.M., contains four additional specimens, also from 
San Francisco Bay, dredged at U. S. Bureau of Fisheries Station 
5781, on coarse sand, pebbly and shell bottom, in 9| to 16 fathoms. 
ODOSTOMIA (EVALEA) WILLETTI. new species. 
Plate 43, fig. 6. 
Shell large, elongate conic, bluish white. Nuclear whorls ob- 
liquely immersed in the first of the succeeding turns, above which 
the tilted edge of the last volution only projects. Postnuclear whorls 
moderately rounded, appressed at the summit, the early ones marked 
by a moderate number of strongly incised lines, while on the later 
whorls the incised spiral lines are finer and much more numerous, in 
addition to the spiral sculpture the whorls are marked by decidedly 
retractively slanting, incremental lines. Suture moderately con- 
stricted. Periphery of the last whorl inflated, feebly angulated. 
Base attenuated, moderately rounded. Aperture oval, somewhat 
effuse anteriorly; posterior angle acute; outer lip thin; inner lip 
very oblique, stout, slightly curved, reflected over and appressed to 
the base, provided with a strong oblique fold at its insertion ; parietal 
wall covered with a thick callus. 
The type. Cat. No. 274007, U.S.N.M., was dredged by Mr. G. 
Willett, at Waterfall Cannery, west side of Prince of Wales Island, 
Alaska. It has almost seven postnuclear whorls and measures — 
length, 5.8 mm. ; diameter, 2.4 mm. Another specimen from the same 
locality is in Mr. Willett's collection. 
ODOSTOMIA (EVALEA) PLEIOREGONA, new species. 
Plate 42, fig. 5 ; plate 45, fig. 6. 
Shell broadly conic, white. Nuclear whorls deeply immersed in the 
first of the succeeding turns, above which the tilted edge of the last 
volution only projects. Postnuclear whorls flattened, appressed at 
the summit, all of them marked by very fine, closely spaced, spiral 
striations and decidedly retractively slanting, fine incremental lines. 
Suture moderately impressed. Periphery of the last whorl inflated, 
obtusely angulated. Base short, well rounded. Aperture large, 
slightly effused anteriorly; posterior angle acute; outer lip thin; 
inner lip oblique, slightly revolute, and appressed to the base for its 
posterior half and provided with a strong, oblique fold at its inser- 
tion ; parietal wall covered with a thick callus. 
The two cotypes. Cat. No. 252430, U.S.N.M., were collected by 
Harold Hannibal in the upper Pliocene, Elk River beds, at the mouth 
of Elk River, near Port Orford, Oregon. One of these is a young 
NO. 2193. WEST AMERICAN MARINE M0LLUSE8—BART8CII. 667 
specimen, having five postnuclear whorls, which measures — length, 
3.6 mm. ; diameter, 2.1 mm. The other is an adult, having three and 
one-fifth postnuclear whorls, and measures — length, 4.8 mm.; diam- 
eter, 2.8 mm, 
I confused this species previously with Odostomia {Evalea) steph- 
ensi Dall and Bartsch, which is a recent form, but additional material 
of O. stephensi makes it necessary to change my opinion and requires 
that this be described as new. 
ODOSTOMIA (EVAIiEA) ORFORDENSIS, new species. 
Plate 43, fig. 2. 
Shell small, oval. Nuclear whorls decollated. Postnuclear whorls 
appressed at the summit, well rounded, marked by slightly retrac- 
tively slanting, incremental lines and exceedingly fine spiral stria- 
tions. Suture moderately constricted. Periphery of the last whorl 
well rounded. Base moderately long, well rounded. Aperture oval ; 
posterior angle acute; inner lip curved and appressed to the base; 
parietal wall covered with a thick callus. 
The type. Cat. No. 252431, U.S.N.M., was collected by Harold 
Hannibal in the upper Pliocene, Elk Kiver bed, at the mouth of Elk 
River, at Port Orford, Oregon. It consists of the last three and one- 
half postnuclear whorls and measures — length, 3 mm.; diameter, 
1.6 mm. 
This form I had previously identified as Odostomia {Evalea) val- 
ensi Dall and Bartsch, which is a recent form, but additional material 
cies makes it possible to determine the limits of variation of it and 
also requires that this shell be given a distinct name. 
ODOSTOMIA (EVALEA) ANDERSONI, new name. 
Eulimella californica Anderson and Martin, Proc. Cal. Acad. Sci., 1914, p. 
67, pi. 7, figs. 19a, 196, and 19c, not Odostomia (Evalea) California Dall 
and Bartsch, Bull. 68, U. S. Nat. Miis., 1909, pp. 20-25. 
This is an Odostomia belonging to the subgenus (Evalea) ; the 
name californica being preoccupied makes the new name necessary. 
The specimens were collected in the Lower Miocene in the bottom of 
a small canyon, about 11 miles due north of Barker's ranch house, 
Kern County, California. 
The type No. 141 and cotype No. 142 are in the California Academy 
of Sciences. The type measures — length, 4.5 mm. ; diameter, 2 mm. 
ODOSTOMIA (ODOSTOMIA) ORCUTTI. new species. 
Plate 46, fig. 8. 
Shell minute, pupoid, pale brown, marked by retractively slanting, 
incremental lines only. Nuclear whorls deeply immersed in the first 
668 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 
of the succeeding turns. Postnuclear whorls slightly rounded and 
appressed at the summit, the summit of the last one dropping some 
little distance below the pieriphery of the preceding whorl gives to 
the penultimate whorl an overhanging aspect. Suture moderately 
impressed. Periphery of the last whorl slightly inflated. Base mod- 
erately long, strongly rounded, with a narrow umbilical chink. Ap- 
erture oval; outer lip thin; inner lip slightly curved, strongly re- 
flected, and provided with a very strong, oblique fold a little ante- 
rior to its insertion; parietal wall covered with a moderately thin 
callus. 
The type. Cat. No. 274006, U.S.N.M., was dredged by C. R. 
Orcutt near the foot of Broadway in San Diego Bay, California. It 
has four and one-fifth postnuclear whorls and measures — length, 1.5 
mm. ; diameter, 0.8 mm. 
The minute size and pupoid shape distinguish the shell at once 
from any of the Western American Odostomias. 
CERITHIOPSIS (CERIXmOPSIS) CHARLOTTENSIS, new epecies. 
Plate 46, figs. 9, 11. 
Shell elongate conic, pale brown. Nuclear whorls strongly rounded, 
three, forming a slender very elevated spire, smooth. Postnuclear 
whorls w^ell rounded, appressed at the summit, marked by rather 
strong, almost vertical axial ribs of which 14 occur upon the first 
four turns, 16 upon the fifth, 18 upon the sixth, and 20 upon 
the penultimate whorl. Intercostal spaces a little wider than the 
ribs. The spiral sculpture consists of three strong cords, of which 
the one at the summit is a little less strong than the other two. The 
junction of the spiral cords and the axial ribs form strong tubercles, 
those on the cord at the summit are well rounded, while those of the 
median cord are truncated anteriorly and posteriorly. The tubercles 
of the third cord are truncated posteriorly and sloped gently ante- 
riorly. The spaces inclosed between the spiral cords and the axial 
ribs are well-rounded pits. Suture moderately constricted. Periph- 
ery of the last whorl marked by a spiral groove, which equals in 
strength and width the groove that separates the median from the 
third cord on the spire. Base short, well rounded, smooth, excepting 
the exceedingly fine incremental lines and microscopic spiral stria- 
tions which are also present on the spire and a very slender basal 
fasciole which surrounds the insertion of the inner lip. Aperture 
decidedly channeled anteriorly; posterior angle obtuse; outer lip 
thin, showing the external sculpture within, decidedly sinuous at 
the edge; inner lip rendered decidedly flexuose; p>arietal wall cov- 
ered by a thin callus. 
NO. 2193. WEST AMERICAN MARIXE MOLLUSKS—BARTSCH. 669 
The type and three paratypes, Cat. No. 225185, U.S.N.M., were 
collected by the U. S. Bureau of Fisheries steamer Albatross, at 
station 4205, in 60 fathoms, on mud bottom; bottom temperature 
47.6° in Queen Charlotte Sound, British Colimibia. The type, 
which has lost the first 2 nuclear whorls, has 7| postnuclear turns 
and measures — length, 5 mm.; diameter, 1.7 mm. The nuclear 
Avhorls were described from one of the paratypes. 
CERITHIOPSIS (CERITHIOPSIS) GRIPPI, new species. 
Plate 46, fig. 12. 
Shell of medium size, chestnut brown. Nuclear whorls 4|, smooth, 
well rounded, forming a moderately elevated apex, which is trans- 
parent. Postnuclear whorls narrowly shouldered at the summit, 
moderately rounded in the middle, decidedly contracted from the last 
spiral cord to the suture, marked by slender, slightly retractive axial 
ribs, of which 14 occur on the first, 16 upon the second and third, 
18 upon the fourth and fifth, and 20 upon the remaining turns. In- 
tercostal spaces about half as wide as the ribs. In addition to this 
axial sculpture, the whorls are marked by three strong spiral cords, 
of which the one at the summit is a trifle weaker than the other two. 
The junction of the axial ribs and the spiral cords form very prom- 
inent, well rounded tubercles, of which those on the first and median 
cords are well rounded, while those on the third cord are truncated 
posteriorly and sloped gently anteriorly. The spaces inclosed be- 
tween the cords and the axial ribs are well-rounded, well-impressed 
pits. Suture almost channeled. Periphery of the last whorl marked 
by a broad groove, which is a little wider than the groove be- 
tween the median and the third cord. The axial ribs extend across 
this groove, but stop at its anterior limit. Base short, well rounded, 
marked by 2 strong spiral grooves, of which one is on the median 
part, while the other encircles the insertion of the inner lip. The 
entire surface of the spire and the base is marked by very fine in- 
cremental lines and much finer spiral striations. Aperture of irreg- 
ular shape, decidedly channeled anteriorly; posterior angle very 
obtuse ; outer lip somewhat effuse, rendered decidedly sinuous at the 
edge by the external sculpture; columella very strong; inner lip re- 
flected and appressed to the columella. Parietal wall covered by a 
thin callus. 
The type and another specimen. Cat. No. 250632, U.S.N.M., were 
collected by Mr. Gripp, in 15 fathoms, outside of kelp, off San Diego 
Bay, California. The type has 8| postnuclear whorls and measures — 
length, 4.7 mm. ; diameter, 1.2 mm. Two additional specimens in 
Mr. Gripp's collection were examined. 
670 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 
CERITHIOPSIS (CERITHIOPSIS) BAKERI, new species. 
Plate 46, fig. 10. 
Shell of medium, size, chestnut brown. Nuclear whorls 3i, well 
rounded, smooth, forming a styliform apex. Postnuclear whorls 
well rounded, narrowly, tabulatedly shouldered at the summit, and 
decidedly contracted anterior to the third keel, marked by rather 
slender axial ribs, of which 18 occur upon the first to fourth, 20 
ujDon the fifth, 22 upon the sixth, and 2-i upon the last turn. Inter- 
costal spaces about 1^ times as wide as the ribs. In addition to the 
axial sculpture the whorls are marked by three strong spiral keels 
of which the first, which is considerably weaker than the rest, is at 
the summit. These keels are about as wide as the spaces that sepa- 
rate them and are much stronger than the axial ribs. The junctions 
of the axial ribs and the spiral keels form tubercles. The tubercles 
on the first keel are well rounded, while those on the second and third 
are truncated posteriorly and slope gently anteriorly. Periphery of 
the last whorl marked by a deep spiral groove which is as wide as 
that separating the median from the third keel. This groove is 
crossed by the continuations of the axial ribs which stop at the 
anterior termination of the groove. Suture strongly channeled. 
Base moderately long, slightly concave, marked by a very strong 
spiral keel immediately anterior to the peripheral groove. The 
anterior border of this keel is limited by a slender incised line. A 
second low, weakly developed spiral cord encircles the middle of the 
base between the basal fasciole, which is a mere slender thread at the 
insertion of the columella, and the keel immediately anterior to the 
periphery. Aperture of irregular shape, decidedly channeled an- 
teriorly; posterior angle obtuse; outer lip thin, rendered sinuous at 
the edge by the strong external sculpture ; inner lip decidedly flexuose, 
reflected over and adnate to the base ; parietal wall covered with a 
moderately thick callus. 
The type. Cat. No. 223049, U.S.N.M., was collected by Dr. Fred 
Baker in 7-10 fathoms, south of Coronado Island, California. It 
has 7^ostnuclear whorls and measures — length, 4.2 mm. ; diameter, 
1.5 mm. 
CERITHIOPSIS (CERITHIOPSIS) HELENA, new species. 
Plate 46, fig. 2. 
Shell very small. Nuclear whorls 4|, light yellow, slightly 
rounded, separated by a moderately constricted suture forming an 
acicular apex. Postnuclear whorls chestnut brown, excepting the 
first keel which is white on all the whorls, tabulatedly shouldered at 
the summit, moderately rounded and strongly constricted below the 
NO. 2193. WEST AMERICAN MARIXE M0LLVSKS—BART8CII. 671 
third spiral keel, marked by rather feeble axial ribs, which are 
slightly retractive. Of these ribs, 16 occur upon the first and second, 
18 upon the third, 20 upon the fourth, and 24 upon the penultimate 
whorl. The spiral sculpture consists of three strong keels which are 
a little wider than the spaces that separate them and considerably 
wider than the axial ribs. The first of these is at the summit, the 
second one midway between the first and third, while the third is a 
little posterior to the suture. The junction of the axial ribs and 
spiral keels renders the spiral keels tubercular. The tubercles on the 
first cord are oval with their long axis corresponding to the axial 
sculptur'e. The tubercles on the median cord are truncated both 
anteriorly and posteriorly, but sloped a little more gently anteriorly, 
while the tubercles on the third cord are truncated abruptly pos- 
teriorly and gently anteriorly. Suture narrowly channeled. Pe- 
riphery of the last whorl marked by a deep spiral sulcus, which is 
as wide as that separating the third from the median cord on the 
spire. This groove is crossed by the continuations of the axial rib 
which terminate at its anterior margin. Base moderately long, 
marked by a strong spiral keel immediately anterior to the peripheral 
sulcus, and another a little less strong in the middle of the space be- 
tween the insertion of the columella and this keel. This middle keel 
is bordered on each side by a deep sulcus. In addition to this, the 
entire spire and base also bear exceedingly fine spiral striations and 
incremental lines. Aperture of irregular outline, decidedly chan- 
neled anteriorly; posterior angle obtuse; outer lip thick within, thin 
at the edge where it is rendered sinuous by the external sculpture ; 
columella very stout, almost vertical; inner lip moderately strong, 
reflected over and adnate to the base; parietal wall covered with a 
thick callus which renders the peritreme complete. 
The type, Cat. No. 204128, U.S.N.M., was collected by the U. S. 
Bureau of Fisheries steamer Albatross, on the shores of Panama 
Bay. It has six postnuclear whorls and measures — length, 2.9 mm. ; 
diameter 1.0 mm. 
CERITHIOPSIS OROVILLENSIS Dickerson. 
Cerithiopsis orovillensis Dickerson, Bull. Dept. Geol. Univ. Cal., vol. 9, No. 
17, 1916, p. 489, pi. 39, fig. 7. 
The type comes from the Eocene Tejon formation at the University 
of California locality 2225, south side of Oroville, South Table 
Mountain. It has nine whorls and measures — length, 6 mm.; diam- 
eter, 2 mm. 
CERITHIOPSIS (CERITHIOPSIS) DUMBLEI Dickerson. 
Cerithiopsis dumblei Dickerson, Bull. Dept. Geol. Univ. of Cal., vol. 9, No. 
17, 1916, p. 489, pi. 38, fig. 12. 
The figured type has nine whorls; the specimen measures, length, 
9.5 mm. 
672 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 
It was collected in the Eocene Tejon formation at the University 
of California locality 672, SE. i of NW. i sec. 24, Parson's Peak, 
in Tejon white sandstone, to 10 feet below white shale. 
CERITHIOPSIS OREGONENSIS Dickerson. 
Cerithiopsis oregonensis Dickekson, Proc, Cal. Acad. Sci., ser. 4, vol. 4, 1914, 
p. 121, pi. 11, figs. 5, 5a. 
The type of this species. No. 246, California Academy of Sciences, 
comes from the Eocene, locality 25, Eoseburg Quadrangle, Oregon, 
near the center of sec. 19, T. 26 S., R. 3 W., on the east bank of Little 
Eiver at its confluence with the Umpqua, underneath the bridge at 
that point. It measures— length, 20 mm. ; diameter, 4.5 mm. 
CERITHIOPSIS BOLINGERENSIS Clark. 
Cerithiopsis boUngerensis Clark, Bull. Dept. Geol. Univ. Cal., vol. 8, 1915, 
pp. 490, 491, pi. 65, fig. 25. 
This species comes from the Miocene Upper San Pablo of Las 
Trampas Ridge, University of California locality 1182. It is said 
to have seven or eight whorls and measures about 8 mm. in length. 
CERIXmOPSIS TURNERI Clark. 
Cerithiopsis turneri Clark, Bull. Dept. Geol. Uuiv. Cal., vol. 8, 1915, p. 490, 
pi. 65, figs. 1, 2. 
This specimen comes from the Miocene, in the Lower San Pablo 
group at Kirker Pass, University of California locality 100. 
The type is said to have 10 to 11 whorls and measures — length, 
about 15 mm. ; diameter, 4 mm. 
BITTIUM BARTOLOMENSIS, new specieg. 
Plate 47, fig. 5. 
Shell stout, very broadly conic, with deeply channeled suture, the 
posterior half between the summit and suture of each whorl and the 
posterior half of the base brown, the rest white. Nuclear whorls 
decollated. Postnuclear turns marked by broad, rounded axial ribs, 
of which 16 occur upon the second to fifth, 18 upon the sixth, and 20 
upon the last turn. These ribs extend strongly from the rather 
prominent shoulder at the summit to the suture. The spiral sculp- 
ture consists of four equally strong and equally spaced cords, which 
are about as wide as the spaces that separate them. On the last two 
turns a slender intercalated spiral thread appears between the 
second and third and the third and fourth cords. The junction of the 
axial ribs and spiral cords form quite strong well-rounded tubercles, 
while the spaces inclosed by them are rather deep concave pits except 
Avhere they are divided by the intercalated threads. Suture strongly 
% 
NO. 2193. WEST AMERICAN MARINE MOLLUSKS—BARTSCH. 673 
constricted, channeled. Periphery of the last whorl rendered angu- 
lated by a cord, the groove between which and the fourth cord of the 
spire is crossed by two slender spiral threads. Base short, concave in 
the middle, marked by seven subequal and subeqiially spaced low 
rounded spiral cords, which are about as wide as the spaces that 
separate them, and numerous very fine axial threads which are best 
shown in the grooves. Aperture oval, slightly protracted and weakly 
channeled anteriorly ; posterior angle obtuse ; outer lip thin, rendered 
sinuous hj the external sculpture ; inner lip oblique, slightly curved, 
reflected over and appressed to the base; parietal wall covered by a 
thin callus. 
The type. Cat. No. 266937, U.S.N.M., was dredged in shallow 
water in San Bartolome Bay, Lovv-er California. It has 7^ post- 
nuclear whorls and measures — length, 6.6 mm. ; diameter, 2.6 mm. 
BITTIUM CHALLISAE, new species. 
Plate 47, figs. 2, 6. 
Shell very large, white. Nucleus and early postnuclear turns de- 
collated, those remaining slightly shouldered at the summit, weakly 
rounded in the middle and decidedly contracted immediately above 
the suture, marked by rather strong, low, well-rounded axial ribs of 
which 14 occur upon the second and third, 16 upon the fourth to 
sixth, 18 upon the seventh, and 20 upon the last turn. The spiral 
sculpture consists of four cords on the early whorls, of which the 
first, at the summit, is a little weaker than the rest. These primary 
cords are truncated posteriorly and slope gently anteriorly. Begin- 
ning with the fourth whorl an intercalated thread makes its appear- 
ance between all the cords and between the summit and the first cord. 
Suture strongly constricted. Periphery of the last whorl rendered 
angulated by a cord. Base short, slightly concave, marked by five 
low, broad, well rounded, obsolete cords which are subequal and sub- 
equally spaced. Aperture broadly oval, rather strongly channeled 
anteriorly; posterior angle obtuse; outer lip thin rendered sinuous 
at the edge by the external sculpture, showing the external markings 
within ; inner lip somewhat sinuous, rather stout, reflected over and 
appressed to the base; parietal wall covered by a moderately thick 
callus. 
The type and another specimen. Cat. No. 272376, U.S.N.M., were 
collected by Miss Bertha Challis at San Juan Island, Gulf of Greor- 
gia, British Columbia. The type has nine whorls remaining and 
measures — length, 13 mm. ; diameter, i.2 m.m. 
6500S°— Proe.N.M.vol..52— 17 43 
674 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 
BITTIUM SANTAMARIENSIS. new species. 
Plate 47, fig. 3. 
Shell elongate conic, pale brown. Nuclear whorls decollated. Post- 
nuclear whorls well rounded, narrowly tabulatedly shouldered at 
the summit, becoming decidedly contracted between the fourth spiral 
cord and the suture, marked by narrow, well-rounded, almost vertical 
axial ribs of which 14 occur upon the first and second, 16 upon the 
third and fourth, 18 upon the fifth, and 20 upon the last turn. In 
addition to the axial sculpture, the whorls are marked by four strong 
spiral cords which are equal and equally spaced, the space between 
them being as wide as the cords. The first of these cords is at the 
summit. The junction of these cords and the axial ribs form elon- 
gated, well-rounded tubercles, while the spaces between them form 
rectangular pits, the long axis of which coincides with the spiral 
sculpture. On the last whorl a slender spiral thread is present in 
each groove between the raised keels. Periphery marked by a rather 
strong spiral cord. The space between this and the fourth cord on 
the spire bears a slender spiral thread. Base moderately long, con- 
cave, marked by 8 slender spiral threads which are not quite as broad 
as the spaces that separate them. Aperture broadly oval, moderately 
channeled anteriorly ; posterior angle obtuse ; outer lip thin, rendered 
sinuous by the spiral sculpture ; inner lip oblique, somewhat concave, 
reflected over and appressed to the base ; parietal wall covered by a 
thin callus. 
The type. Cat. No. 268623, U.S.N.M., was collected in shallow 
water in Santa Maria Bay, Lower California. It has 6^ postnuclear 
whorls and measures — length, 4.9 m. ; diameter, 2 mm. 
BITTIUM SANJUANENSIS. new species. 
Plate 47, fig. 4. 
Shell verv large, rather thin, bluish white. Nuclear whorls decol- 
lated. Postnuclear whorls almost appressed at the summit, well 
rounded, decidedly contracted immediately posterior to the suture, 
marked by strong, broad, heavy, slightly protractive axial ribs which 
become enfeebled toward the summit and slightly widened there. 
Of these ribs, 12 occur upon the second and third, 14 upon the fourth 
and fifth, and 16 upon the last whorl. Intercostal spaces not quite 
as broad as the ribs. The spiral sculpture consists of five cords, of 
which the first, which is at the summit, is very slender. The two 
succeeding this are successively a trifle stronger, while the fourth 
and fifth are very strong, the last being the heaviest of all. The 
junction of the axial ribs and the spiral cords form well-rounded, 
elongated nodules which have their long axis parallel with the spiral 
% 
NO. 2193. WEST AMERICAN MARINE M0LLUSE8—BARTSCH. 675 
sculpture; the spaces inclosed between them are very shallow, rec- 
tangular pits. In addition to the above sculpture the entire surface 
of the spire and base is marked by many very slender lines of growth 
and exceedingly fine microscopic spiral striations, the combination 
of which gives the surface a somewhat cloth-like texture. Suture 
strongly constricted; it would be channeled were it not for the fact 
that the peripheral keel makes its appearance above the summit of 
the whorl, hence removes the strongly channeled element. Periphery 
of the last whorl marked by strong spiral cord, which is about as far 
anterior to the fifth cord of the spire as that is separated from the 
fourth. Base very short, decidedly concave, marked by three slender 
spiral cords, of which the first is about as far anterior to the pe- 
riphery as that is distant from the fifth cord on the spire. The other 
two cords are very slender, the first being at the base of the columella, 
while the next is a little distance posterior to it. Aperture subquad- 
rate; quite strongly channeled anteriorly; the junction of the outer 
and basal lip forming almost a right angle ; posterior angle obtuse ; 
outer lip very thin, showing the external sculpture within and ren- 
dered sinuous by the external sculpture at the edge; inner lip de- 
cidedly oblique, slightly curved, slender, reflected and appressed to 
the base ; parietal wall covered by a thin callus. 
The type, Cat. No. 168753, U.S.N.M., was collected by Miss 
Challis off San Juan Island, Gulf of Georgia, British Columbia. 
It has lost the nuclear turns; 7| postnuelear whorls remaining 
measure — length, 11 mm. ; diameter, 3.8 mm. 
BITTIUM SERRA, new species. 
Plate 47, fig. 1. 
Shell stout, broadly conic, grayish white. Nuclear whorls de- 
collated. Postnuelear whorls appressed at the summit, strongly 
rounded, marked by slender, rounded, somewhat retractive axial 
ribs, of which 18 occur upon the first and second, 20 upon the third, 
22 upon the fourth, and 24 upon the remaining turns. In addition 
to the axial sculpture, the whorls are marked by four spiral cords, of 
which the first, which is at the summit, is a little weaker than the rest. 
The junction of these cords w^ith the axial ribs form prominent, 
strongly rounded tubercles, while the spaces inclosed between them 
are rounded pits. Suture moderately constricted but not channeled. 
Periphery of the last whorl rendered angulated by a spiral cord. 
Base short, slightly concave, marked by four very low, broad, almost 
equal, spiral cords, which are separated by mere impressed lines. 
Aperture oval, narrowly, twistedly channeled anteriorly; posterior 
angle obtuse; outer lip rendered wavy by the external sculpture; 
inner lip decidedly curved, somewhat revolute, reflected over and ap- 
pressed to the base ; parietal wall covered with a thin callus. 
676 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol. 52. 
The type, Cat. No. 271076, U.S.N.M., was dredged by the U. S. 
Bureau of Fisheries steamer Albatross^ at station 4310, off Point 
Loma Light, California, in 71 to 75 fathoms, on gi'een mud and fine 
sand bottom. The type has lost the nucleus and probably the first 
postnuclear turn; the 6| remaining measure — length, 6.5 mm.; di- 
ameter, 2.6 mm. Cat. No. 268745, U.S.N. M., contains another speci- 
men from San Bartolome Ba}^, Lower California. 
BITTIUM TRAMPASENSIS Clark. 
Bittium frampasensis Clark, Bull. Dept. Geol. Univ. Cal., vol. 8, 1915, pp. 
489, 490, pi. 65, figs. 3. 5. 
This species occurs in the Miocene, Upper San Pablo group, at 
University of California locality 118. Two specimens are figured, 
both incomplete; the measurement given is 8 mm. for the height. 
BITTIUM ? PABLOENSIS Clark. 
Bittium pahloensis Clakk, Bull. Dept. Geol. Univ. Cal., vol. 8, No. 22, 1915, 
p. 489, pi. 65, fig. 10. 
The unique type came from the Miocene of the San Pablo group 
of San Pablo Bay. From the description and figure I would un- 
hesitatingly say that this is not a Bittium, but I am unwilling to 
refer it to another group without more evidence. The type is said 
to have six or seven whorls and to measure — length, about 16 mm. ; 
diameter, 8 mm. 
BITTIUM LONGISSIMUM Cooper. 
Bittiin longissimum Cooper, Bull. 4, Cala. State Min. Bur., 1894, p. 43, pi. 2, 
fig. 30. 
I overlooked this specimen in my paper on The Eecent and Fossil 
Mollusks of the Genus Bittium from the West Coast of America.^ 
It is a slender specimen of 16 whorls, measuring — length, 12.25 
mm. ; diameter, 1.55 mm. It was collected by Mr. Watts in the weir 
at jNLarysville Buttes. The figure above cited is a wretched one, ab- 
solutely unrecognizable. A specimen from the type locality is nicely 
figured by Dickerson.^ 
_ BITTIUM WASHINGTONIANA Dickerson. 
Triforis wasJiingtoniana Dickerson, Cala. Acad. Sci., vol. 5, 1915, p. 63, 
pi. 6, fig. 13. 
This is not a Triphoris, but a Bittium. The No. 362 Cala. Acad. 
Sci. type has 9 whorls and measures— length, 20 mm. ; diameter, 4.5 
mm. It comes from the Eocene-Tejon formation locality 183 on the 
west bank of the Cowlitz Kiver, about one and three-fourths miles 
southeast of Vadar (Little Falls), Washington. 
iProc. U. S. Nat. Mus., vol. 40, 1911, pp. 383-414, pis. 51-58. 
2 Bull. Dept. Geol. Univ. California, vol. 9, No. 17, 1916, pi. 40, fig. 11. 
NO. 2193. WEST A3IERICAN MARINE M0LLUSKS—BART8CH. 6Y7 
ALVANIA BARTOLOMENSIS. new species. 
Plate 46, fig. 4. 
Shell very elongate ovate, pale yellow, slightly mottled and 
streaked with rust brown. Nuclear whorls 2^, smooth, well rounded. 
Postnuclear whorls well rounded, appressed at the summit, marked 
by incised spiral lines which are of somewhat irregular strength and 
spacing. Of these lines 17 occur between the summit and the pe- 
riphery of the last whorl. The axial sculpture is reduced to mere 
lines of growth. Suture moderately constricted, periphery of the 
last whorl well rounded. Base moderately long, well rounded, 
marked by incised spiral lines which are of equal strength and spac- 
ing. Aperture irregular, decidedly effuse at the junction of the outer 
and basal lip; slightly channeled anteriorly; posterior angle acute; 
outer lip thin at the edge, thick within. Inner lip short, thick, 
slightly curved, reflected over and appressed to the somewhat atten- 
uated base; parietal wall covered with a thick callus, which renders 
the peritreme complete. 
The type. Cat. 2G8742, U.S.N.M., was collected by the United States 
Bureau of Fisheries steamer Alhatross, in shallow water in San Bar- 
tolome Bay, Lower California. It has 4J postnuclear whorls and 
measures — length, 4.2 mm. ; diameter, 1.9 mm. 
ALVANIA KYSKAENSIS. new species. 
Plate 46, fig. 6. 
Shell elongate ovate, pale brownish yellow. Nuclear whorls one 
and one-half, well rounded, marked by very slender spiral striations 
and exceedingly fine incremental lines. Po^nuclear whorls strongly 
rounded, weakly shouldered at the summit, marked by slender axial 
riblets which are somewhat sinuous and slightly retractively slanting. 
Of these ribs 24 occur upon the first, 26 upon the second, and 40 upon 
the penultimate turn ; these are about one-third as wide as the spaces 
that separate them. In addition to the axial sculpture, the whorls 
are marked by four spiral cords, of which the first, Avhich is about as 
far from the summit as it is distant from the second, is very weak 
on the first two whorls, but on the last assumes almost the strength 
of the other three cords. The other three cords are of equal strength 
and spacing. The junction of the axial ribs and the spiral cords, 
which are a little stronger than the ribs, form weak nodules, while 
the spaces inclosed between them appear as well impressed, squarish 
pits. In addition to this sculpture, the entire surface is marked by 
very fine incremental lines and numerous miscroscopic spiral stria- 
tions, the two lending it a cloth-like texture. Suture strongly con- 
stricted. On the last whorl the first basal keel makes its appear- 
ance above the summit of the succeeding turn. Periphery of the 
last whorl marked by a spiral sulcus about as wide as those separat- 
ing the cords on the spire. Base well rounded, marked by seven equal 
678 rROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 
and equalh' spaced low, well-rounded spiral cords, which are a little 
wider than the spaces that separate them. xVperture subcircular; 
posterior angle obtuse; outer lip strongly curved, rendered somewhat 
sinuous by the external sculpture ; inner lip strongly curved ; parietal 
wall covered by a thick callus which renders the peritreme almost 
complete. 
The type and three specimens of this species. Cat. No. 271407, 
U.S.X.M., were collected by Dr. William H. Dall in,shallow water 
at Kyska Harbor, Aleutian Islands, Alaska. The type has 3^ post- 
nuclear whorls and measures — length, 2.5 mm. ; diameter, 1.2 mm. 
ALVANIA DINORA, new species. 
Plate 46, fig. 5. 
Shell small, elongate ovate, yellowish white. Nuclear whorls two, 
strongly rounded, smooth. Postnuclear whorls strongly rounded, 
almost appressed at the summit and moderately constricted at the 
suture, marked by 7 very low, flattened spiral cords between the 
sutures, which are separated by a shallow impressed line. The axial 
sculpture consists of numerous very slender threads which are almost 
vertical. Suture strongly constricted. Periphery of the last whorl 
somewhat inflated, well rounded, base moderately long, slightly at- 
tenuated anteriorly, marked by 6 low, ill-defined rounded spiral cords, 
which, like those on the spire, are separated by mere impressed lines. 
The axial ribs also continue over the base. Aperture broadly oval, 
decidedly effuse at the junction of the basal and the outer lip; poste- 
rior angle obtuse; outer lip thick within, thin at the edge, evenly 
curved from the posterior angle to its junction with the inner lip; 
inner lip decidedly curved, somewhat reflected and appressed to the 
base; parietal wall covered by a thick callus, Avhich practically ren- 
ders the peritreme complete. 
The type. Cat. No. 268730, U.S.N.M., and three additional speci- 
mens of this species, were collected by Mr. Willis at Forrester Island, 
Alaska. The type has a little more than 3 postnuclear whorls and 
measures — length, 2 mm.; diameter, 1 mm. 
This is a very small species with very feeble sculpture. 
In addition to these new species of Alvania, we have seen the addi- 
tional specimens listed under the species mentioned below since the 
publication of my little monograph on The Recent and Fossil Mol- 
lusks of the Genus Alvania from the AVest Coast of America.^ 
It may be well to mention here that recent studies in the classifi- 
cation of the group will make it necessary to redistribute the mem- 
bers which we have brought together under the genus Alvania among 
several groups. I refrain from doing this at this time, because I 
wish first to examine the type-species of all the supraspecific groups 
before giving a final opinion. 
iProc. U. S. Xat. Mus., vol. 41, pp. 333-3G2, pis. 29-32. 
K0.2193. WEST AMERICAN MARINE M0LLVSK8—BARTSCII. 679 
ALVANIA COSMIA Bartsch. 
Five specimens, Cat. No. 2714:97, U.S.N.M., from Todos Santos 
Bay, California. 
ALVANIA ACUTILIRATA Carpenter. 
Five specimens, Cat. No. 268741, U.S.N.M., from San Diego, Cali- 
fornia. 
ALVANIA AEQUISCULPTA Keep. 
Eleven speciments. Cat. No. 253089, U.S.N.M., from Pacific 
Beach, California. 
ALVANIA COMPACTA Carpenter. 
Two specimens. Cat. No. 271002, U.S.N.M., from Netarts Bay, 
Oregon. Fifteen specimens. Cat. No. 2687-18, U.S.N.M., from Yaku- 
tat Bay, Alaska. 
Of Rissoina we have seen additional specimens of the following 
five species: 
RISSOIiVA KELSEYI Dall and Bartscli. 
One specimen. Cat. No. 271651, U.S.N.M., from San Diego, Cali- 
fornia. 
RISSOINA KISTIA Bartsch. 
One specimen. Cat. No. 211678, U.S.N.M., from La Paz, Gulf 
of California. 
RISSOINA DALLI Bartsch. 
One specimen, Cat. No. 268737, U.S.N.M., from San Pedro, 
California. 
RISSOINA NEREINA Bartsch. 
One specimen, Cat. No. 268643, U.S.N.M., from San Bartolome 
Bay, Lower California. 
One specimen, Cat. No. 267735, U.S.N.M., from Santa Maria Bay, 
Lower California. 
G80 PROCEEDINGS OF THE ^ AT I OX A L MU.<EU2f. vol.52. 
EXPLANATION OF PLATES. 
Plate 42. 
Fig. 1. Pyramidella (PharcideUa) magdalencnsis, new species. 
2. Turbonilla {Pyryohnii])ros) franciscann, new species. 
3. PyramidelUda (Lonyvhaeus) coopcri Anderson and Martin. 
4. TurboniJla (StrioturhoniUa) rcdondocnsis, new species. 
5. Odostomia (Evalea) pleioregona, new species. 
G. Ttirbonilla (Pyrgiscu^) ista, new species 
7. Turhonilla (Pyrgiscus) cortezi, new gpecies. 
8. Turhonilla {StrioturboniUa) barkleyensis, new species. 
9. Turbonilla (Mormula) sebastiani, new species. 
10. Turbonilla {Pyrgiscus) dora, new species. 
Plate 43. 
Fig. 1. Turbonilla (Pyrgiscus) lamna, new species. 
2. Odostomia {Evalea) orfordensis, new species. 
3. Turbonilla {Mormula) viscainoi, new species. 
4. Turbonilla {Pyrgiscus) nlloa, new species. 
5. Turbonilla {Ugartea) juani, new species. 
6. Odostomia {Evalea) tvilletti, new species. 
7. Turbonilla {Pyrgolampros) hannibaU, new species. 
8. Turbonilla {StrioturboniUa) schmitti, new species. 
Plate 44. 
Fig. 1. Turbonilla {StrioturboniUa) montezuma, new species. 
2. Turbonilla {StrioturboniUa) santamariana, new species. 
3. Turbonilla {StrioturboniUa) doredona, new species. 
4. Turbonilla {Pyrgolampros) pugetensis, new species. 
5. Turbonilla {Pyrgisculus) guilleni, new species. 
0. Turbonilla {Pyrgiscus) eva, new species. 
7. Turbonilla {Pyrgolampros) trcmperi, new species. 
8. Turbonilla {Pyrgolampros) hcmphilli, new species. 
9. Turbonilla {StrioturboniUa) barkleyensis, new species. 
10. Turbonilla {Pyrgii^cus) inn, new species. 
11. Turbonilla {StrioturboniUa) canadensis, new species. 
Plate 45. 
Fig. 1. Turbonilla {Cingulina) urdeneta, new species. 
2. Turbonilla {Pyrgiscus) baegcrti, new species. 
3. Turbonilla {Pyrgiscus) cabrilloi, new species. 
4. Turbonilla {Pyrgiscus) tccalco, new species. 
5. Tu7'bonilla (Pyrgiscus) hartolomensis, new .species. 
G. Odostomia (Eralea) pleioregona, new species. 
7. Odostomia (Evalea) franciscana, nev/ species. 
8. Turbonilla (Pyrgiscus) corsoensis, new species. 
9. TurbmiiUa (Pyrgiscus) mariana, new species. 
10. Turbonilla (Pyrgiscus) almejascyisis, new species. 
11. Turbonilla (Pyrgiscus) lazarocnsis, new species. 
12. Turbonilla (Pyrgiscus) cortcn, new species. 
% 
NO. 2193. WEST AMERICAN MARINE M0LLU8K8—BARTSCH. 681 
Plate 46. 
Fig. 1. Odostomia (Chrysallida) santamarieivsis, new species. 
2. Cerithiopsis (Cerithiopsis) JieJcna, new species. 
3. Odostomia {Chrysallida) taravaU, new species. 
4. Alrania hartolomcnsis, new species. 
5. Alrania dinora, new species. 
6. Alvania kyskacnsis, new species. 
7. Odostomia (Evalea) valeroi, new species. 
8. Odostomia {Odostomia) orcutti, new species. 
9. Cerithiopsis {Cerithiopsis) charlottcnsis, new species. 
10. Cerithiopsis (Cerithiopsis) bakeri, new species. 
11. Cerithiopsis {Cerithiopsis) charlottensis, new species. 
12. Cerithiopsis {Cerithioiisis) grippi, new species. 
Plate 47. 
Fig. 1. Bittium serra, new species. 
2. Bittium challisae, new species. 
3. Bittium santamariensis, new species. 
4. Bittium sanjuanensis, new species. 
5. Bittium hartolomensis, new species. 
6. Bittium challisae, new species.