32 THE POLYPLACOPHORA OF TASMANIA, 



the North- West Coast of Tasmania, "where/, aus/rah's ha:S not 

 been seen, and I. ausirahs is found on the East and South 

 Coasts where /. novcE-hollandice is missing. Length 63, 

 breadth 35 m.m. 



14. ISCHNOCHITON NOV^-HOLLANDI^ 



(Gray), Reeve, 1847. 



/. nov(2-hollandice (G-ray), Reeve; Pilsbry : Man. Conch. r 

 Ser. J.,Yol. XI7., p. 145. 



Chiton novcB-hollandice. Reeve, Conch. Icon. t. 21. 1847. 



The central areas of this shell are smooth, except for 

 a very dense and regular microscopic granulation, but the 

 fine longitudinal riblets of /. australis are missing 

 So far, it has not been found on the East and South Coasts, 

 but is found in numbers on the North-West Coast, from 

 Devonport to Stanley. The colour is a dark green, 

 marbled with blue. One specimen is a chocolate brown, 

 probably stained with iron. Length 58, breadth 27 m.m. 



15. CALLISTOCHITON ANTIQUUS, Reeve. 



C antiquus, Reeve, Conch. Icon., Chiton f. 169 ; Pilsbry : 

 Man. Conch., Ser. I., Vol. XIY., p. 274. 



Specimens found at Leven by Miss Lodder, and at 

 Devonport, Biirnie and Stanley by W. G. Torr. It may 

 easily be known by having two strongly elevated ribs in 

 the lateral area. W. G. Torr has traced this shell all arou^id 

 the Coast of Australia, from Queensland to West Australia. 



16. PLAXIPHORA COSTATA (Blainville). 



C costatus, Blain.; Diet. Sci. Nat., 1825, Vol., XXVIL, 

 p. 548; Pilsbrv, Man. Conch, 1898, Vol. XV., p. 105. 



P. costafa, Blain.; Thiele, Zool. Chun., 1909, Heft LVL, 

 p. 24. 



P. costata, Blain. ; Iredale ; Proc. Mai. Soc, Lond.,. 

 Vol. IX., Part IL, June 1910, p. 98. 



