93 



Somewhat cordate, oblique ; transverse ridges acute, slightly 

 elevated, numerous ; white, spotted with brown, violet pos- 

 teriorly. 



(d) Valves smooth. 



70. Chio^e laevigata, Sowerby (Venus), Thesaurus Conch., 

 t. 159, f. 156 — 8; Marcia faba [Reeve], Angas. 



Estuary of the Port Adelaide Creek, of the River Onkapa- 

 ringa, and of the River Glenelg ; Surveyor's Point, St. Vincent 

 Gulf ; and the Great Australian Bight. Also Victoria, Tas- 

 mania, and New South "Wales. 



The specimens from the estuary of the Onkaparinga which 

 Angas has identified with C. faba, Reeve, are not separable 

 from G. laevigata of more southern localities. 



Rather inflated, ovate, acuminate posteriorly ; colour brown 

 or fawn, often with lighter-coloured rays from the umbones ,- 

 length, one and three-quarter inches. 



71. Chtone ttndttlosa, Lamarck (Venus), An. s. Vert., v. y 

 p. 606 ; V. variabilis, Sowerby. 



Port Lincoln ; Holdfast Bay ; Guichen and Robe Bays. Also 

 Shark Bay and King George Sound (type), New South "Wales, 

 and North Australia. 



Triangularly ovate, white, rayed with angular, undulating, 

 reddish-brown lines or blotches ; length, one inch. 



72. Ciece coeetjgata, Chemnitz. Var. C. ceocea, Gray ; 

 Cytherea rivularis, Menke, Moll. Nov. Holl., p. 42. 



Port Lincoln ; Kangaroo Island ; Noarlunga ; Port Adelaide 

 Creek. Also West and North Australia, Queensland, and the 

 Indian Ocean. 



Depressed, lenticular, with flattened contiguous umbos, sur- 

 face concentrically corrugated ; two inches in the larger 

 diameter. 



73. Dosinia geata, Deskayes, Brit. Mus. Cat., p. 10 ; 

 D. Diana, Adams and Angas, Proc. Zool. Soc, 1863, p. 424. 



PI. v., fig. 15. 



Hardwicke Bay, Spencer Gulf (Angas) ; Hog Bay, Kangaroo 

 Island; Encounter Bay ; South-East coast (Bednall !) . Also 

 Tasmania! (type). 



Orbicular, white, gibbous, very smooth in the umbonal 

 region; concentric lirae depressed, crowded, microscopically 

 very closely radiately striated ; length, one and three-quarter 

 inches. 



D. Diana was founded on South Australian specimens which 

 I fail to separate from Tasmanian examples of D. grata. 



