139 



'Notes on South Australian Marine Mollusca, with 

 Descriptions of New Species.- Part XVI. 



By Jos. C. Verco, M.D. (Loud.), F.R.C.S. (Eng.). 



[Read August 8, 1918.] 



This paper is a continuation of the series from page 201, 

 •of vol. xxxvi., of 1912, and deals with the genera Cypraea, 

 Trivia, and Erato. After enumerating for a species its 

 localities in South Australia, those in Western Australia are 

 .given as far north as Fremantle, where I may have taken it. 

 Further, where in the same area I have obtained species not 

 found in South Australia, they have been listed, so as to 

 "indicate which pass round Cape Leuwin and which do not. 



Cypraea reevei, Sowerby. 



Cypi*aea reevei, Gray: Sowerby's Conch. Illus., 1832, fig. 52, 

 Oat. Cvpraeidae, 1837, No. 15; Adcock: Handlist Aquatic Moll. 

 S. Austr., 1893, p. 5, No. 153; Shaw: Proc. Mai. Soc, 

 1909, vol. viii., p. 302; Verco: Trans. Roy. Soc. S. Austr., 

 1912, vol. xxxvi., p. 210; HedJev : Jour. Ro}\ Soc. W. Austr., 

 1916 (1915), p. 199. 



Habitat. — Sowerby (1837) gives Garden Island, mouth 

 of the Swan River, Western Australia. 



Taken off Newland Head, Encounter Bay, 20 fathoms, 

 1 dead; in Backstairs Passage, 20 fathoms, 1 dead; Yanka- 

 lilla beach (Adcock) ; Cape Spencer beach (Tate) ; Corny 

 Point beach, Spencer Gulf; St. Francis Island beach, 1 per- 

 fect; 100 fathoms, 90 miles west of Eucla, 3 alive; 72 to 120 

 fathoms, 120 miles west of Eucla, 1 dead; Hopetoim beach, 2 

 (A. Parkinson); Esperance beach, 4; Albany beach, 3; 

 Tlottnest Island, 3. 



When mature the length may be 40 mm. or only 23 mm. 

 The relative width may vary, being 25 mm., with lengths 

 of 36 and 39 mm. Of three taken alive in 100 fathoms one 

 is of a uniform delicate cream colour, one a lavender-grey, 

 and one of a rather deeper tint with four obscure darker 

 transverse bands. The beautiful example from St. Francis 

 Island is of a dark slate colour, with close set antero-posterior 

 lighter lines, 4 faint broad transverse darker bands, and the 

 whole surface finely malleated. Some more solid older speci- 

 mens are of a light chestnut colour with darker chestnut 

 bands. - All have the pink tips front and back. 



It is a rare shell in South Australia, and appears not to 

 reach the Victorian boundary, is distinctly more common at 



