882 



Corbula ephamilla, Tate. 



1865. Corbula sulcata, M'Coy, Ann. Mag. Nat. Hist. 3rd ser. vol. xvi. p. 114 



{non Lamarck). 

 1876. Corbula sulcata, Tenison-Woods, Pap. Roy. Soc. Tas. 1875, p. 16. 

 1878. Corbula sulcata, R. Etheridge, jim., Cat. Aust. Foss. p. 154. 

 1885. Corbula ephamilla, Tate, id. 1884, p. 229. 

 1887. Corbula ephamilla, Tate, Trans. Roy. Soc. South Aust. vol. is. p. 176, 



pi. xvii. figs. \Za-b and 14. 

 1893. Corbula ephamilla, Tate and Dennant, id. vol. xvii. pt. 1, p. 225. 

 1896. Corbula ephamilla, Pritcliard, Proc. Roy. Soc. Vict. vol. viii. n.s. 



p. 140. 



Shell of the same group as C. ficus, Solander, of the Upper 

 Eocene of North- Western Europe ; the right valve is very large 

 as compared with the left, which has two or three irregular riblets 

 running from the umbo to the ventral margin ; the posterior margin 

 of both valves is abruptly, obliquely truncated ; surface of the 

 right valve more strongly, concentrically ridged than the left valve ; 

 a well-marked keel arising in the umbo and curving round to the 

 extremity of the posterior ventral margin characterizes both valves. 



Dimensions. — Height 19 mm.; length 25 mm. 



Form, and Loc. — Eocene and Miocene : Tasmania, Victoria, and 

 South Australia. 



83984. Double-valved specimen ; from Table Cape. Purchased. 



L. 4792. Many examples of both valves ; from Muddy Creek. 



Presented by John Dennant, Esq. 



L. 6614. Both valves of the adult ; from Muddy Creek. 



Purchased. 



L. 9899. Series illustrating stages of growth ; from Muddy 

 Creek. Purchased. 



L. 10461, L. 10462. Several examples of the left valve ; from 

 the Murray river, near Adelaide. Presented hj William Evans, Esq. 



Corbula pyxidata, Tate. 



1887. Corbula pixidata, Tate, Trans. Roy. Soc. South Aust. vol. is. p. 177, 



pi. xvii. figs, \2a-b. 

 1893. Corbula pyxidata, Tate and Dennant, id. vol. xvii. pt. 1, p. 225. 

 1895. Corbula pyxidata, Tate and Dennant, id. vol. six. jjt. 1, p. 113. 



Shell closely resembling the European Eocene C. lamarclci, 

 Deshayes, which, however, has a concave post-dorsal surface, 

 whilst that surface in the Australian species is slightly convex, 



