143 



5. Ischnochiton (Stenochiton) juloides, Adams and 

 Angas, 1865. 



Stenochiton juloides, Adams and Angas, Proc. Zool. Soc, 

 1864, p. 193; op. cit., 1865; Pilsbry, Man. Conch., ser. i., vol. 

 xiv., p. 55. 



Ischnochiton (Stenochiton) juloides, Bednall, Proc. Mai. Soc, 

 London, vol. ii., part 4, April, 1897, p. 142; Sykes, Proc. Mai. 

 Soc, London, vol. ii., part 2, July, 1896, p. 87. 



Hab. — Holdfast Bay (Angas), Largs Bay (Adcock), 

 Yorke Peninsula (Matthews). 



I have specimens (whole or valves) from St. Francis 

 Island (dredging and shore), Port MacDonnell, Carrowa 

 (West Coast), Hardwicke Bay, Spencer Gulf (dredging), 

 Kangaroo Island, Troubridge Reef, Glenelg, Brighton, Largs 

 Bay, and Fowler Bay. Valves are frequently found in shell 

 sand. Mr. A. R. Riddle informs me that he has found 

 them on Pinna inermis, old boots and bottles, and especially 

 near the roots of Zostera at an extremely low tide, by dredging 

 or with a grappling-iron. They are rarely found in shallow 

 water. 



6. Ischnochiton (Stenochiton) pilsbryanus, Bednall, 1896. 



Ischnochiton (Stenochiton) pilsbryanus, Bednall, Proc. Mai. 

 Soc, London, vol. ii., part 4, April, 1897, p. 142. 



Type specimens found on seaweed, Troubridge Shoal, St. 

 Vincent Gulf. 



I have specimens from Tapley Shoal living in Zostera 

 (seaweed), dredged specimens from Spencer Gulf and off St. 

 Francis Island, live specimens and numerous valves in from 

 6 to 20 fathoms of water. Two large specimens were found 

 by Mr. F. L. Saunders on seaweed at Aldinga; they mea- 

 sured 9"5 x 3 mm. A number of very fine variegated speci- 

 mens of this chiton have been found near the roots of Zostera 

 at Wool Bay and other places by Mr. A. R. Riddle. The 

 largest specimen measures 17x5 mm. 



7. Ischnochiton (Stenochiton) pallens, Ashby, 1900. 



Ischnochiton (Stenochiton) pollens, Ashby, Trans. Roy. Soc, 

 S.A., 1900. 



Dredged in St. Vincent Gulf by Dr. Verco. I found 

 one specimen in shell sand at Aldinga, and Mr. Zietz col- 

 lected a pretty buff specimen from Largs Bay. This species 

 differs from I. 'pilsbryanus in the rapid tapering of the tail 

 valves. As I have not had access to the type specimens of 

 either pilsbryanus or pallens, it may be that my specimens 

 may have to be reconsidered. 



