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Show 1867.] MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. 207 This pretty species of Trivia may readily be distinguished by the liver-coloured blotches on the back of the shell. It is found amongst the rocks and under stones at low spring tides. Length 6 lines. Fam. AMPHIPERASID^E. 128. AMPHIPERAS HORDACEA. Ovulum hordaceum, Lam. Anim. sans Vert. x. p. 471 ; Reeve, Conch. Icon. pl. 8. f. 37. A beautiful little elongated species, of a bright orange-colour, transversely striated, with the outer lip dentately serrated. A single specimen only was found, attached to the same branch of Gorgonia from which the following species was procured. On comparing it with examples of A. hordacea from Borneo it appears more shouldered and compact, with the sculpture stronger and the aperture narrower and more compressed. Until an opportunity offers of examining more specimens, I should hesitate to separate it from A. hordacea. Length 3\ lines. Bornean specimens 5^- lines. 129. *VOLVA ANGASI. Ovulum angasi, A. Adams, M S . in Mus. Cuming; Reeve, Conch. Icon. pl. 10. f. 43 «, b. Of this fine species, which somewhat resembles Ovulum subre-flexum, Sow., I obtained two live specimens on a branch of red Gorgonia amongst the rocks at Watson's Bay, during an unprecedentedly low spring tide. No other specimens have been found. Length 1 inch 3 lines. Fam. STROMBID^E. 130. STROMBUS (CANARIUM) LUHUANUS. Strombus luhuanus, Linn. Syst. Nat. (12th edit.) p. 1209 ; Reeve, Conch. Icon. Strombus, pl. 9. f. 19. This species occurs at the "Bottle and Glass" rocks, Vaucluse Bay, on the southern side of Port Jackson, to which spot it appears to be exclusively confined. Following the coast northwards it again makes its appearance in great numbers at Moreton Bay, and is widely extended thence over the whole of the Indo-Pacific molluscan province. The Port Jackson specimens are smaller and lighter in colour fhan those from the tropics. Length 2 inches 6 lines. 131. STROMBUS (CANARIUM) FLORIDUS. Strombus floridus, Lam. Anim. sans Vert. ix. p. 707. S. mutabilis, Swainson. This little Strombus, so variable in form and markings, is found in company with S. luhuanus, at the same locality in Port Jackson. It is not at all common there, and displays the same paleness of colour. It is one of the most abundant species of the tropics, and ranges from East Africa to Tahiti. Length 1 inch 2 lines. |