0)8
DESClUrTION OF BATIIVTOM.I REG NANS. N.SP., FllOM THE
INDIAN OCEAN.
J5y Jamks Cosmo Mklvim,, M.A., J).Sc.
liend IQth May, 191S.
J5aTIIVI'()MA KKQNAKS, 11. sp.
B. TKsTA fusifonui, Ciilcarea. pallide cincrco-
straniiiiea, solidiila, pulcliorrinie scu]pturata,
anfrai'tibus 9, (pionim apicalos iluo globulaiTs,
lan-issimi, ca^tei'is ad suturas aiigusto sod ]u-ofiiiidc
oaiialiculatis, infrii, juxta suturas, loii<:;itudiiiali1or
iriTgulaiitrr arete striatis, deiiide apud jtiTijilu'riaiu
tuniido aup:ulatis, spiralitcr ad auguluiu oroberriiue
cresciMiti-tuberculatis, imbrieatulis, ultimo anfractu
ca^toios oxaiquanto, infra poripboriain spiruliter
crobrilirato, liris ad 15, suponiis parvi-tuboroulatis,
siiiml ac liiiois increineiitalibus loiij^itudiiialitor
irrogularitcr pra.Hlitis, apertura augusto oblonga,
labro uuaiigulato, paullum llexuoso, coliiniolla alba,
iiitidinsoula, ad lucdiiiiu tuborculo-jdioata, siiiu
jHTobscuro, canali brovi, rocurvo.
Long. SO, lat. 12 mm.
JTah. — Indian Ocean. Investigator Expedition (Alcock).
A very olaborately sculptured member of tlie Turridoe, Avliicb
upon more tlian one occasion I have closely examined witli the late
Mr. Edgar Smith, and ngreed that the genus lUxthi/toma, Harris &
Burrows, was the most titting for its reception. This was estab-
lished in 1891, Miiirx catitphradns, JJrocchi,' a fossil form, being
the tvpc. There is, doubtless, a close alliance with Surcula,
H. &*A. Adams.
Dr. W. H. Dall" includes the line species Surcula carpfuteriana.
(labb, from Californiii,' and its near allies, tri/oni, Glabb, gabhianu,
Dall, as tvpical Jiafhjifomcc. I consider B. rrgiiaus is very nearly
allied also to Geuotia luhdorfi, Lischke, from Japan, a line and still
uncommon species, with somewhat similar sculpture, though hardly
so elaborated.
The exact locality of this species, dredged at considerable depth
during the cruise of S.S. Investigator, is unknown, but it probably
comes from the Bay of Bengal. It is in dead condition, but fairly
perfect, and was given by Dr. Alcock to Mr. F. "VV. Townseud, who
in his turn was kind enough to present it to me in 1910.
' Harris it Burrows. Eocene and Oligocene, Paris Basin, p. 11.3.
-Dall, "Miocene of Astoria and Coos Bav, Oregon"': Professional Paper U.S.
Geol. Snrv., No. 59. 1909. p. 27.
^ Proc. California Acad. Sci., iii. 1865. p. 183.
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