144 
8. Ischnochiton (Heterozona) cariosus, Carpenter, MS. : 
Pilsbry, 1873. ff Xk 
Heterozona cariosa, Carpenter, MS.: Pilsbry, Man. Conch., 
ser. i., vol. xiv., p. 65; vol. xv., p. 82. 
Ischnochiton (Heterozona) cariosus, Pilsbry: Bednall, Proc. 
Mal. Soc., London, vol. ii., part 4, April, 1897, p. 143; Sykes, 
Proc. Mal. Soc., London, vol. ii., part 2, July, 1896, p. 87. 
This shell is widely distributed. It is abundant in Spen- 
cer and St. Vincent Gulfs, and the writer has collected it 
on St. Francis Island and all around the coast of Western 
Australia as far as Fremantle. It is often covered with 
Serpularia and has a carious appearance, hence its name. 
9. Ischnochiton pilsbryi, Bednall, 18987 FL 45—_.6, 
Ischnochiton pilsbryi, Bednall, Proc. Mal. Soc., London, vol. | 
ii., part 4, April, 1897, p. 143. 
Found at Sultana Bay (Bednall) and at Hickey Point, | 
Y.P., and St. Francis Island by the writer. Most of the | 
specimens were found on rocks embedded in the sand. At | 
first sight it might be mistaken for crispus or cariosus, but 
markings and girdle scales are very distinct, and all the 
specimens are “uniform ochraceous-yellow.” 
10. Ischnochiton ARR, Reeve—1847; 4 iy, 
Chiton ustulatus, Reeve, Conch. Icon., sp. 102; Pilsbry, 
Man. Conch., ser. i., vol. xiv., p. 96. | 
Ischnochiton ustulatus, Carpenter, MS.: Bednall, Proc. Mal. 
Soc., London, vol. ii., part 4, April, 1897; Sykes, Proc. Mal. 
Soc., London, vol. ii., part 2, July, 1896, p. 88. 
Lepidopleurus ustulatus, Angas, P.Z.S., 1867, p. 222. 
When alive this shell is very brilliant, almost crimson ; 
but it loses its colour in formalin, methylated spirits, or when 
dry, and retains its singed appearance from which it derives 
its name. The writer has traced it all around the coast from 
Cape Jaffa to St. Francis Island. He also found it in Wes- 
tern Australia. An abnormal specimen was found by Mr. 
F. L. Saunders at Second Valley. It is much broader than 
the usual types; it measures 37x18 mm. 
This chiton easily changes its habitat. Scores of 
specimens seen by Mr. Matthews on Yorke Peninsula one 
week were not able to be discovered the week following. 
11. eatin oO ED rom A 
Chiton crispus, Reeve, Conch. Icon., sp. 120; Pilsbry, Man. 
Conch., ser. i., vol. xiv., p. 89. 
Ischnochiton haddoni, Pilsbry, Man. Conch., ser. i., vol. xiv., 
p. 88 
