358 



Cardita in the fossil state, as Stoliczka' has pointed out, and the 

 writer prefers to call the Australasian forms here described Cardita, 

 for the present. 



Tijpe. — Chama cali/culata, Linnaeus.' 



Cardita scabrosa, Tate. 



1886. Cardita scabrosa, Tate, Trans. Roy. Soc. South Amst. vol. viii. p. 152, 



pi. ii. fig. 4. 

 1893. Cardita scabrosa, Tate and Dennant, id. vol. xvii. pt. 1, p. 224. 

 1896. Cardita scabrosa, Pritchard, Proc. Hoy. Soc. Vict. vol. viii. n.s. p. 132. 



Distinguished by the shell being oval-subquadiate, the radiating 

 costse being thirty in number, and by their bearing erect scales. 

 Dimensions. — Height 16 mm. ; length 20 mm. 

 Form, and Loc. — Eocene : Muddy Creek, Victoria. 



L. 4802, L. 4804. Specimens of both valves. 



Presented hy John Dennant, Esq. 



L. 9904. Examples of the right valve. Purchased. 



Cardita polynema, Tate. 



1886. Cardita pohjnema, Tate, Trans. Eoy. Soc. South Aust. vol. viii. 



p. 153, pi. ii. fig. 7. 

 1893. Cardita pohjnema, Tate and Dennant, id. vol. xvii. pt. 1, p. 224. 

 1895. Cardita polynema, Tate and Dennant, id. vol. xix. pt. 1, p. 113. 



The chief differences between this and C. latissima, with which 

 it is closely allied, are that the shell is narrower anteriorly, and 

 there are a larger number of costse. It is less produced anteriorly 

 than is C. gracilicostata, Tenison- Woods. 



Dimensions. — Height 34 mm. ; length 40 mm. 



Form, and Loc. — Eocene : Spring Creek, Victoria. 



L. 9902. Examples of both valves. Purchased. 



' PaliEont. Indica, Cret. Fauna S. India, vol. ili. Pelecypoda, 1871, p. 282. 

 - Cf. Fischer, Manuel de Conchyl. 1S87, p. 1012. 



