30 THE POLYPLACOPHORA OF TASMANIA, 



8. ISCHNOCHITON DIVERGENS. (Reeve.) 



Chiton divergens. E-eeve, Concli. Icon , 1847, Pilabry, 

 Man. Conch., Ser. L, Vol. XIY., p. 90. 



Some very fine specimens were taken at Ulverstone and 

 Stanley, on the North Coast. Length 47 m.m, breadth 

 20 m.m. The large, convex, closely and deeply striated 

 pebbly scales of divergens disiingnish it irom fruticosus. 



9. ISCHNOCHITON CONTRACTUS. (Reeve.) 



Chiton contractus, Reeve : Conch. Icon., 1847. Pilsbry : 

 Mai). Conch., Ser. I., Vol. XIV., p. 93. 



The zig-zag wrinkles in the pleural and dorsal areas are 

 a distinct marking of this fine species. Some of them are 

 of a deep pink, while others are a light gray, flamed in 

 the middle with brown-olive. They vv^ere taken all along 

 the North Coast from Devonport to Stanley. Tasmania 

 (Mus. Cuming) is given as the habitat of the type speci- 

 men. JLength 40 m.m., breadth 20 m.m. 



10. ISCHNOCHITON (HETEROZONA) CARIOSUS. 



(Pilsbry.) 



Heterozona cariosa (Carpenter, 17 S.), Pilsbry: Man. 

 Conch., Ser. L, Vol. XIV., p. 65. 



Specimens taken at Penguin, Devonport, and Ulver- 

 stone, on tne North Coast. The girdle in the vicinity 

 of the valves is crowded with flattened projecting scales, un- 

 equal in size, and growing smaller towards the margin. 



11. ISCHNOCHITON SMARAGDINUS. 



(Angas 1867.) 



Lophvrus smaragdinus, Angas : Proc. Zool. Soc, 1867, p. 

 115; Pilsbry, Man. Conch., Ser. L, Vol. XIV., p. 137. 



Next to C. pellis-serpentis and / crispus this is the 

 commonest chiton on the North Coast. It was seen 

 from Devonport to Stanley. It occurs also on the East 



