Note: In the recently-published Journal of the Malacological Society of
Australia, 1: 30-31, a new form of the genus Cymbiolacca is described as
Aulicina perry i, Ostergaard and Summers, from "Westaria" (sic, = Wistari)
Reef, Capricorn Group. This form appears to be closely related to the
Heron Island shells here described, and its taxonomic status will be discussed
in the review of the genus which is in course of preparation.
REFERENCES
Cotton, B. C. (1949). — Australian Recent and Tertiary Mollusca Family
Volutidae. Rec. S.A. Mus. 9: 181-196, pis. 13-16.
Cox, J. (1872). — Distribution of Australian Volutes. Sydney. (Privately
published.)
Iredale, T. (1939).— Mollusca, Pt. 1. Gt. Barrier Reef Expedition, 1928-29,
Sci. Reports, 5: 209-425, pis. 1-7.
Jukes, J. B. (1847). — Narrative of the Surveying Voyage of H.M.S. Fly.
Vols. I and II. London.
Macgillivray, J. (1852). — Narrative of the Voyage of H.M.S. Rattlesnake.
Vols. I and II. London.
Descriptions of New Species of Chitons
(Mollusca, Loricata)
By K. L. Milne.
It is now some thirty years since Iredale and Hull's Monograph of the
Australian Loricates was issued, classifying and describing the known chiton
fauna at that time. Intensive collecting of this group of molluscs during
the intervening years has ccmfirmed the data presented by Iredale and
Hull for the most part. Some new species have been found, and descriptions
of three of these are given here. Unfortunately two of the new species
are based on one or two specimens only, and consequently details of slitting
and valve interiors are not known, but it is hoped additional material
may soon be available to complete our knowledge of these forms. It is
hoped that this and other papers published on the chiton fauna may one
day be combined and issued as a supplement to the Monograph.
Genus LUCILINA Dall, 1881.
Type Species by Monotypy, Chiton confossus Gould 1846.
LUCILINA TILBROOKI, Sp. nOV.
Description: Shell elongate oval, dried specimen measuring 8.5 mm.
in length by 4 mm. in breadth; median valves round-backed with sides
distinctly convex; colour darkish dull red; anterior valve smooth near apex,
with rays of inverted V-shaped nodules; shoulder valve with the beak
slight, median valves with lateral areas strongly differentiated, each with
2 to 4 radiating rows of irregular pustules, the centre row shorter with
pustules smaller than the outer rows; pleural area of each median valve
with 6 to 7 ribs, slightly weaker near the jugum, the bases corresponding
with the anterior row of pustules on the lateral areas, jugum smooth;
posterior valve with mucro central, elevated, the post-mucronal slope
steeply convex, vertical at base, the ante-mucronal area sulcate, with ribs
as in the median valves, the post-mucronal area irregularly pustulose;
girdle fleshy when alive, flat and horny when dried, relatively wide, and,
when viewed under a powerful lens, seen to be covered with a closely-packed
152
BioStor
