36 THE POLYPLACOPHORA OF TASMANIA, 



crocodilus, in the list of Tasmanian shells, found at 

 Cape Pillar. Records Aus. Mus., Vol. VII., No. 2, 1908, 

 bj Hedley and Miy. It has more resemblance to A, 

 verconis, Torr and Ashby, and is probably a new species, 

 but the material at hand is scarcely sufficient to describe it. 



23. ACANTHOCHITES (NOTOPLAX) SPECIOSUS 



(H. Ad.) 



Cryptoplax (notoplax) speciosus, H. Adams: Pre c. Zool, 



Soc, 1861, p. 385. 



Acanthochites speciosus, H. Ad. : Pilsbry, Man. Conch , Ser, 

 L, Vol. XV., p. 32. 



A. inotcplax) speciosus, H. Ad. : Pilsbry, Proc. Acad. Nat, 

 Sci. Phila.l., 18i^4, p. 83. 



Three specimens were dredged in about nine fathoms 

 in D'Entrecaste.iux Channel. Length (dried specimen)^ 

 45, breadth 17 m.m. In life the specimens would be 

 more than twice as large — the girdle being of a spongy 

 nature, and very large in proportion to the shell. This 

 species may be recognised by the flat-topped pustules on 

 the latero-pleural areas. It appears to be confined 

 to deep water. 



24 ACANTHOCHITES LACHRYMOSUS. 

 Spec. Nov. 



GENERAL APPEARANCE.— Shell elongated, narrow, 

 in proportion to width, slightly carinated, side slopes 

 curved. Exposed portion of valves about one-third of 

 total width of dried specimens. Colour : Uniformly 

 brown, or olive green to pale green, with dorsal area much 

 darker, almost black. 



ANTERIOR VALVE.— Five costse extending from 

 apex to margin, corresponding to the five dental slits 

 and clothed with irregular rounded granules, small at 

 the apex, and becoming much elongated towards the 

 margin. Dentition, five slits, rays leading to the apex. 

 Sinus broad ; in certain plates broader than the exposed 

 pirt of the valves. 



