BY W. L. MAY AND W. G. TOUR, LL.D., ETC. 35 



Acanthochites {noloplax P) variabilis, Pilsbry : Proc. Acad. 

 Nat. Sci., Philad., 1891, p. 84. 



This beautiful acantho. has not been reported previously from 

 Tasmania. Specimens were found all along the North-West 

 Coast, from Devonport to Stanley. Its fern-leaf appear- 

 ance of the dorsal area and the granulose character of 

 the whole of the tegmentum make this shell easily dis- 

 tin<^'uishable from other acanthochitons. Characteristic 

 tufts are often missing, being easily rubbed off, but the 

 corneous base remain.s. Length of dried specimen, 11 

 m.m., breadth 6 m.m. So far it is unknown on the 

 South and East Coasts, probably another evidence of the 

 influence of the Bassian Isthmus. 



21. ACANTHOCHITES BEDNALLI, Pilsbry. 



Acanthochites bethiaili, Pilsbry : Proc. Acad. Nat. Sci., 

 Philad., 1894. p 81. 



Acanthochites granostriatus. Pilsbry : Nautilus, Vol. VII. 

 (1894), p. 119; Proc. Acad. Nat. Sci.,* Philad., 1894, p. 81. 



We have not been able to separate A. hednalli from 

 A. granostriatus, as the distinction made by Pilsbry as 

 to the solidity of the valves and the deeper stria- 

 tions of A. hednalli are not so clear when a long 

 series of 20 or 30 specimens are being examined. As both 

 names were published in the same paper, we have pre- 

 ferred to keep the name A. hednalli in memory of one to 

 whom Australian chiton hunters owe a great deal. 



Between 20 and 30 specimens of this chiton were ob- 

 tained on tJae North-West Coast from Devonport to Stan- 

 ley, seven specimens from Cole's Bay (East Coast), and 

 several slight!}^ varying, with a more wedge-shaped dorsal 

 area from Frederick Henry Bay. 



The teai^drop particles of the I'atero-pleural area com- 

 bined with the large lateral tufts and more or less deep 

 striations of the dorsal area are a good guide to distinguish 

 this species, 



22. ACANTHOCHITES SP. 



Five valves of this chiton were dredged in one hun- 

 dred fathoms off Cape Pillar. It was wrongly named A. 



