145 
Ischnochiton crispus, Reeve: Bednall, Proc. Mal. Soc., Lon- 
don, vol. ii., part 4, April, 1897, ia 145; Sykes, Proc. Mal. Soc., 
London, vol. ii., part 2, July, 1896, p. 87. 
Chiton longicymba, Blainville: Sowerby, Conch. Illus., fig. 67; 
Reeve, Conch. Icon., pl. xxiv., fig. 163 (non Blainville). 
Ischnochiton longicymba, Blainville: Hutton, ‘‘Challenger’’ 
Report, p. 17 (non Blainyille). 
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. TI collected a five-valved specimen at 
Ulverstone, Tasmania. 
No chiton varies so much in colouration as 7. 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 2 
milky-white ground with regular green or brown longitudinal 
markings continued throughout the valves. ‘The description 
given by Pilsbry, Joc. cit., of ZT. haddoni agrees with the shell 
better than any other T have seen. 
12. Ischnochiton fruticosus, Gould, 1846. FAAS 
Chiton fruticosus, Gould, Proc. Boston Soc. Nat. Hist., ii., 
p. 142; Pilsbry, Man. Conch., ser. i., vol. xiv. 
Proc. Mal. Soc., London, vol. ii., part 4, April, 1897, p. 145. 
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; Pilsby, 7 rQ 
Man. Conch., ser. i., vol. xiy., p. 93. 
Ischnochiton contractus, Reeve: Pilsbry, Man. Conch., ser. 
1., vol. xiv., p. 93; Nautilus, vol. viii., P; 129; Sykes, Proc. 
Mal. Soc., London, vol. ii., part 2, July, 896, p. 87; Bednall, 
Proc., Mal. Soe., 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 7. 
decussatus. 
F 
