34 THE POLYPLACOPHORA OF TASMANIA, 



P. matthewst, Iredale, Proc. Mai. Soc, Loud., Vol. 

 IX., Part II., June, 1910, p. 99. 



Five specimens of this somewhat rare shell were found 

 at Burnie and Devonport, on the North-West Coasit, and 

 one in Frederick Henry Bay, in the South. The speci- 

 mens agree with the P. conspersa of Bednall, re- 

 ferred to above, but they are smooth between the nodu- 

 lose riblets of the lateral area, as well as on the pleural 

 areas. Whether this is due to erosion or the growth of 

 algse, it is difficult to say. Length 29, breadth 17 m.m. 

 (a large specimen). Some of the specimens show granu- 

 lous markings over the central area, which may pro- 

 bably be the remains of the wrinkled V-shaped sculpture 

 of Iredale's description. 



19. ACANTHOCHITES ASBESTOIDES, Smith. 



Chiton {acanthochiton) asbestoides (Cpr., MS.), Smith : 

 Zool. Coll., H.M.S. "Alert," p. S3; Pilsbrv : Man. Conch., 

 Ser. L, Vol. XV., p. 17. 



Acanthochites asbestoides^ Cpr.: Pilsbry, Proc. Acad. Nat. 

 Sci., Philad., 1894, p. 79. 



Tom. Iredale, in Proc. Mai. Soc, Lond., Vol. IX., Part 

 III., Sept., 1910, p. 155, quotes Dr. Thiele (Revision . . . 

 Chitoneu, I., p. 48) that Sueurii, Blainv., must replace 

 the familiar Asbestoides, Smith. Unfortunately, we have 

 not had access to Dr. Thiele's Revision, and have allow- 

 ed the old name to stand. 



This species can be easily recognised by the long asbes- 

 tos-like golden or silver tufts that lie right along the 

 sutures, reaching to the dorsal areas. They are gen- 

 erally black in colour, and the dorsal areas smooth; viz., 

 without longitudinal striae. Specimens were found at 

 Devonport, Ulverstone, Burnie and Penguin, on the 

 North-West Coast, and all' around on the South and East 

 Coasts. Length 20, breadth 12 m.m. 



20. ACANTHOCHITES (LOBOPLAX) VARIABILIS 



(Ad. and Angas.) 

 Hanley a variabilis, Ad. and Anor. : Proc. Zool. Soc, 18G4, 

 p. 194; Pilsbry: Man. Couch., Ser. L, Vol. XV., p. 101. 



