1867.] MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. 915 



hinge with a small spoon-shaped process projecting inwards. Dredged 

 in Port Jackson, in deep water. Length 6 lines. 



20. Myodora crassa. 



Anatina crassa, Stutchbury, Zool. Journ. v. p. 100, Tab, Suppl. 

 43, f. 5, 6. 



A thick, triangular species, with both valves transversely ribbed. 

 Dredged in Middle Harbour, Length 6 lines. 



21. Myodora pandor^formis. 



Anatina pandorasformis, Stutchbury, Zool. Journ, v. p. 99, Tab. 

 Suppl. 43. f. 3, 4, 



The striae on the right or flattened valve are very fine and smooth. 

 Dredged in Middle Harbour on a sandy bottom. Length 10 lines, 



22. Myodora ovata. 



Myodora ovata. Reeve, Conch, Icon. Myodora, pi. 1. f. 4. 



Shorter than the preceding species, with the striae on both valves 

 raised and prominent. Dredged in Port Jackson. Length 7 lines. 



This species occurs in Port- Adelaide Creek, South Austraha ; and 

 also in the Philippines, according to Cuming. 



23. Myodora brevis. 



Anatina brevis, Stutchbury, Zool. Journ. v. p. 99, Tab. Suppl. 43. 

 f. 1, 2. 



A very elegant, thin, triangular-shaped shell, with the left valve 

 flexuously striated anteriorly. Dredged in Laue Cove, Farm Cove, 

 and Mossman's Bay. Length 1 inch. 



24. Myochama anomioides, 



Myochama anomioides, Stutchbury, Zool. Journ. v. pi. 42. f. 1-4. 



This remarkable shell is usually found attached to the living shells 

 of Trigonia lamarcki. It varies in form, is of a pinkish colour, and 

 in its sculpture partakes somewhat of that of the shell on which it 

 is parasitic. Dredged near the " Sow and Pigs " reef, in Port Jack- 

 son. Length 9 lines. 



25. Myochama strangei, 



Myochama strangei, A. Ad. P. Z. S. 1852, pi. 15. f. 2. 



An oblong, wrinkled species, of a blackish colour, found attached 

 to stones or dead shells. Dredged in Port Jackson (inside the North 

 Head), but of very rare occurrence. Length 1 inch. 



26. Chamostrea albida. 



Chama albida. Lam. 



Gleidothcerus chamoides, Stutchbury, Zool. Journ. p. 98, Tab. 

 Suppl. 42. f. 5-8 ; Sow. Gen. of Shells, f. 1-3. 



This curious genus, of which one species only is known, is pecu- 



