145 



Ischnochiton crispus, Reeve: Bednall, Proc. Mai. Soc, Lon- 

 don, vol. ii., part 4, April, 1897, p. 145; Sykes, Proc. Mai. Soc, 

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



Chiton longicymba, Blainville : So werby, Conch. Illus., fig. 67; 

 Reeve, Conch. Icon., pi. xxiv., fig. 163 (non Blainville). 



Ischnochiton longicymba, Blainville: Hutton, "Challenger" 

 Report, p. 17 (non Blainville). 



This very variable shell is found abundantly on the coasts 

 of New South Wales, Victoria, Tasmania, and South Aus- 

 tralia. The writer has specimens from almost every part of 

 the South Australian coast from Port MacDonnell to St. 

 Francis Island in the Australian Bight. It is not found 

 in Western Australia. I collected a five-valved specimen at 

 Ulverstone, Tasmania. 



No chiton varies so much in colouration as I. crespus. 

 I have pale emerald-green, black with a white stripe on the 

 dorsal area, and white with a black stripe, brown and yellow. 

 The commonest kind is a pale-yellow ochre colour. A very 

 beautiful species has been called var. decoratus. It has a 

 milky-white ground with regular green or brown longitudinal 

 markings continued throughout the valves. The description 

 given by Pilsbry, loc. cit., of I. haddoni agrees with the shell 

 better than any other I have seen. 



12. Ischnochiton fruticosus, Gould, 1846. 



Chiton jruticosus, Gould, Proc. Boston Soc. Nat. Hist., ii., 

 p. 142; Pilsbry, Man. Conch., ser. i., vol. xiv., p. 91; Bednall, 

 Proc. Mai. Soc, London, vol. ii., part 4, April, 1897, p. 145. 



Ischnochiton fruticosus, Gould : Pilsbry, Proc. Acad. Nat. 

 Soc, Philad., 1894, p. 72. 



This common New South Wales species is very rare in 

 South Australian waters. The writer has examined hun- 

 dreds of specimens similar to fruticosus and has only found 

 one in South Australia with the striations on the girdle scales. 

 One specimen only was found by Mr. E. H. Matthews on 

 Southern Yorke Peninsula. 



13. Ischnochiton contractus, Reeve, 1847. 



Chiton contractus, Reeve, Conch. Icon., sp. 78; Pilsbry, 

 Man. Conch., ser. i. ; vol. xiv., p. 93. 



Ischnochiton contractus, Reeve: Pilsbry, Man. Conch., ser. 

 i., vol. xiv., p. 93; Nautilus, vol. viii., p. 129; Sykes, Proc. 

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

 Proc, Mai. Soc, London, vol. ii., part 4, April, 1897, p. 145. 



Chiton pallidus, Reeve, Conch. Icon., sp. 92, March, 1847; 

 Pilsbry, Man. Conch., ser. ix., vol. xiv., p. 89. 



Other synonyms are given by Pilsbry which are evi- 

 dently intended, according to Bednall and Iredale, for /. 



decussatus. 



F 



