POLYPLACOPHORA. 101 



valve and posterior part of the posterior valve smooth ; intermediate 

 valves having the lateral areas swollen, smooth, delicately rugate 

 internally ; central areas lamellose. Marginal ligament wide, 

 roseate. Length 14, width 9 mill. New Caledonia. Rare. Paris 

 Museum. (Rochebr. in Bull. Soc. Philom. 1883-'84, p. 39). 



7. Australian species. 



HANLEYA VARIABILTS Adams and Angas. 



Shell oblong, whitish, variegated with blackish-brown. Valves 

 broad, carinated; dorsal areas longitudinally densely costate, the 

 ribs closely pustulose; lateral areas but slightly elevated, trans- 

 versely undulately costate, thecostse closely pustulose. Girdle, hav- 

 ing short white corneous spicules at the margin, and bunches of pale 

 spicules. 



Length 16, breadth 10 mill. (Ad. & Aug.). 



Yorke's Peninsula, S. Australia (Coll. Angas), under stones at low 

 water. 



AD. & ANG., P. Z. S. 1864, p. 194. ANGAS, P. Z. S. 1865, 

 p. 188. 



Carpenter surmises that this may be a second species of Angasia, 

 but this can hardly be the case, although the girdle characters sug- 

 gest a superficial similarity. It may be a Chcetopleura or even an 

 Acanthochites. 



LEPIDOPLEURUS LIRATUS Adams and Angas. 



Shell small, elongated, convex ; yellowish-brown, maculated with 

 pale brown. End valves and lateral areas concentrically remotely 

 sulcated, densely and minutely lirate, the lirse closely pustulose. 

 Posterior valve elevated, lateral areas slightly elevated ; median 

 valves obtusely carinated in the middle; dorsal areas longitudinally 

 lirate, the line closely pustulose. Girdle pale-brown, densely covered 

 with minute scales. 



Length 8, width 4 mill. (Ad. & Aug.} 



Yorke's Peninsula, S. Australia, under stones at low water 

 (Angas). 



Lepidopleurus liratus H. AD. & ANG., P. Z. S. 1864, p. 192. 

 ANGAS /. c. 1865, p. 187. 



The generic position of the species is unknown, but it may be an 

 Ischnochiton of the contractus group. 



