18G7.] MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. 913 



Fara. Saxicavid^. 



5. Saxicava australis. 



Saxicava atniralis, Lam. Anim. sans Vert. vi. p. 153. 



Found amongst crevices of rocks at low water in Port Jackson. 

 It is extremely variable in form, like the other species of the genus. 

 Length 10 lines. 



Fam. CoRBULiD^. 



6. CORBULA TUNICATA. 



Corbula tunicata, Hinds, P. Z. S. 1843. 



This fine species has the left valve, which is much the largest, 

 deeply grooved over its entire surface. The right valve is grooved 

 near the umbo only. Dredged in 5 to 7 fathoms in Port Jackson. 

 Also from the Philippines (Cuming), and the Straits of Macassar 

 and L'Agulhas Bank (Hinds). Length 1 inch. 



7. Corbula nasuta. 



Corbula nasuta. Sow. P. Z. S. 1833. 



It is impossible to separate this species from C. nasuta, Sow., 

 which comes from the Gulf of Nicoya^ Dredged in Port Jackson. 

 Length 10 lines. 



8. Corbula scaphoides. 



Corbula scaphoides. Hinds, P. Z. S. 1833. 

 Dredged in Port Jackson. Length 6 lines. 



9. Corbula zelandica. 



Corbula zeylandica, Quoy et Gaim. Voy. de I'Astrol. 

 ? C. catlowce, Reeve, P. Z. S. 1844. 



Dredged in Middle Harbour. Length 6 lines. It occurs also in 

 New Zealand and at Moreton Bay. 



Fam. Anatinid^. 



10. Anatina creccina. 



Anatina creccina, Valenciennes, MS. in Mus. Cuming ; Reeve, 

 Conch. Icon. Anatina, pi. 2. f. 12. 



In this species the posterior portion of the valves is widely gaping 

 and curved upwards. It is found in sandy mud at Illawarra Lake, 

 Port Stephen, and Port Jackson. Length 1 inch 10 lines. 



1 1 . Anatina tasmanica. 



Anatina tasmanica, Reeve, Conch. Icon. Anatina, pi. 3. f. 20. 



More ovate than the preceding, with the umbones nearly central. 

 From sandy mud in Port Jackson. Length 2 inches. 



