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Show 224 MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. [Feb. 14, 243. LORICA CIMOLIA. Chiton cimolius, Reeve, Conch. Icon. pl. 21. f. 141. G. volvox, Reeve, Conch. Icon. pl. 6. f. 31. This fine species may at once be recognized by the fissure of its posterior margin. The valves are longitudinally sculptured, and the mantle squamous. It is to be met with occasionally under rocks and stones, at very low tide, about Watson's Bay and Middle Harbour. Length 2\ inches. This Lorica is also found at Port Lincoln, in South Australia. 244. PLAXIPHORA PETHOLATA. Chiton petholatus, Sow. Conch. Illust. f. 65, 66. This Chiton, though common in South Australia, is but seldom met with in Port Jackson, and then not in good condition. The valves are rugosely sculptured at the sides, and the mantle is beset with bifurcated bristles proceeding from a double series of pores. Length 24; inches. 245. *AcANTHOCHITES COSTATUS. Acanthochit.es costatus, II. Ad. & Ang. P. Z. S. 1864, p. 194. Only three or four specimens of this species were taken, at Watson's Bay, during an unusually low tide. Length 8 lines. 246. ACANTHOCHITES SCUTIGER. Acanthochites scutiger, Adams & Reeve, Voy. Samarang; Reeve, Conch. Icon. pl. 27. f. 178. Under stones at Watson's Bay. This little species may be recognized by the tufts of silvery bristles surrounding the pores of the mantle. Length £ inch. 247. * ACANTHOCHITES CARINATUS. Acanthochites carinatus, II. Ad. & Ang. P. Z. S. 1864, p. 194. A single specimen only of this fine new species was found, in Port Jackson. The plates are whitish and finely granulated, and ridged along their summits with black. Length 1 inch 3 lines. 248. *MlCROPLAX GRAYI. Microplax grayi, H. Ad. & Ang. P. Z. S. 1864, p. 194. A single example of this new genus was procured, adhering to the under surface of a stone dredged in Watson's Bay. lt is figured in •Proc. Zool. Soc' 1865, pl. 11. f. 16, 17. Length 6 lines. 249. CRYPTOPLAX STRIATUS. Chitonellus striatus, Lam. Anim. sans Vert. vol. . p. 317. Chiton striatus, Sow. Conch. Illus. f. 62. ? C. occulatus, Quoy et Gaim. Voy. de l'Astr. iii. p. 410, pl. 72. f. 37, 38. |