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Show 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^EFORMIS. Anatina pandor cefor mis, 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, pl. 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 Australia ; 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 Lane Cove, Farm Cove, and Mossman's Bay. Length 1 inch. 24. MYOCHAMA ANOMIOIDES. Myochama anomioides, Stutchbury, Zool. Journ. v. pl. 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 Jackson. Length 9 lines. 25. MYOCHAMA STRANGEI. Myochama strangei, A. Ad. P. Z. S. 1852, pl. 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. Cleidotheerus 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- |
