224 MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. [Feb. 14, 



243. LORICA CIMOLIA. 



Chiton cimolius, Reeve, Conch, Icon. pi. 21. f. 141. 



G. volvox. Reeve, Conch. Icon. pi. 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. lUust. f. 65, ^^. 



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 2^ inches. 



245. *ACANTH0CH1TES COSTATUS. 



Acanthochites costatus, H. 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 sctjtiger. 



Acanthochites scutiger, Adams & Reeve, Voy. Samarang ; Reeve, 

 Conch. Icon. pi. 27. f. 178. 



Under stones at Watson's Bay. This little species may be recog- 

 nized by the tufts of silvery bristles surrounding the pores of the 

 mantle. Length ^ inch. 



247. *Acanthochites carinatus. 



Acanthochites carinatus, H. 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 dred2,ed in Watson's Bay. It is figured in 

 'Proc. Zool. Soc' 1865, pi. fl. f. 16, 17. Length 6 lines. 



249. Cryptoplax striatus. 



Chitonellus striatus. Lam. Anim, sans Vert. vol. . p. 317. 

 Chiton striatus. Sow. Conch. lUus. f. 62. 



? C. occulatus, Quoy et Gaim. Voy. de I'Astr. iii. p. 410, pi. 72. 

 f. 37, 38. 



