BY W. L. MAY AjSD W. G. TORR, LL.D., ETC. 39 



This is the commonest of all the Tasmanian Chitons, 

 and may be found crawling over the rocks everywhere, 

 even up to high water mark. The distinct black wedge- 

 shaped polished dorsal area distiuguiishes it from C. sin- 

 clairi. It is very often difficult to separate the two 

 species. The growth lines of the centrai areas in 

 pellis-serpentis are very distinct, and are crossed by 

 numerous lon«^itudinal riblets, which give the growth 

 lines a nodulose appearance. Length 46, breadth 25 m.vn. 



28. CHITON TRICOSTALIS, Pilsbry. 



Chiton {canaliculaius var. ?) iricostalis, Pilsbrv : Nautilus, 

 Vol. VIII. (1894), p 54. 



This prettily marked and distinctive chiton was found 

 at Devonport and Stanley, one being red, with creamy 

 splashes, and the other olive green, with dark and white 

 splashes. This shell is not unifomily three-ribbed — it 

 sometimes has more, young' specimens have only two. It 

 must be searched for in clean pools in moderately deep water. 



29. CHITON QUOYI, Deshayes. 



Chiton^nridis, Q. and G., Voy. Astrol, III., p. 383 (1834). 



Chiton quoyi^ Desh. in Lam , Anima, s. Vert., VII , p. 509 

 (183(^). 



Chiton glaucm;^\x\>ioxi, Man. N.Z. Moll., p. 112 (1880). 



This shell was in Tenison-Woods' Census of Tasmanian 

 Shells, but was dropped by Tate and May in their census 

 of 1901. It has been re-discovered in 1910 by W. L. 

 May at Bellerive Bluff. It was referred to by May in 

 his additions to the Catalogue of Marine Shells of Tas- 

 mania in the Proc. Roy. Soc. Tasmania, 1910, p. 310. It is 

 uniformly dark olive green. Length 32, breadth 21 m.m. 



30. CHITON CALLIOZONA, Pilsbry. 



Chiton (aereus var.) calliozona, Pilsbrv : Nautilus, Vol. 

 VIIT. (1894), p. 55. 



In looking through Miss Lodders collection, W. G. Torr 



