152 



This is the largest of our true chitons. I have one dried! 

 specimen measuring 55 x 25 mm. Colour markings very vari- 

 able ; pinks, greens, and bronze-browns are wondrously inter- 

 mingled, while the minute pearls of the girdle are like rubies, 

 emeralds, etc. It is found on smooth stones in clean sandy 

 pools among seaweed. I have samples from Second Valley ,_ 

 Normanville, Marino, Wool Bay, Hardwicke Bay, and St. 

 Francis Island. Fine specimens were taken at Marion Reef 

 from the shell of living Pinna inermis and from broken 

 bottles by Mr. A. R. Riddle. It is very like Chiton ozreus,. 

 Reeve, from New Zealand, but there are marked differences. 



28. Chiton jugosus, Gould, 1846. 



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

 1846, p. 142; Pilsbry, Man. Conch., ser. i., vol. xiv., p. 178; 

 Gould, Expl. Exped.,'xii., Moll, and Sh., p. 317, atlas, t. 28, 

 f. 430, 1852; Smith, Zool. Coll. "Alert," p. 78, 1884; Had- 

 don, "Challenger" Polyplac, p. 22, 1886; Bednall, Proc. Mai. 

 Soc, London, vol. ii., part 4, April, 1897, p. 151. 



C. concentricus, Reeve, Conch. Icon., 1847, sp. 95. 



Lophyrus jugosus, Gould, Otia, p. 3, 212, 1862; Angas, 

 P.Z.S., London, 1867, p. 222. 



L. concentricus, P.Z.S., 1867, p. 221. 



Hedley and Hull's comparison of G. jugosus, C. torri 

 (torrianus), and C. co xi, in Records Australian Museum, vol. 

 vii., No. 4, 1909, p. 262, is very valuable. The New South 

 Wales specimens are not, as a rule, as brightly coloured as 

 those from South Australia. Some from Watson Bay, New 

 South Wales, are pink and brown, others a creamy-white in 

 the six median valves, and the whole shell is broader than 

 those from South Australia. The South Australian specimens 

 are uniform in colour, the pale-blue green markings in the 

 sulcations of the pleural areas are very distinct. It is found 

 in fairly deep water, and loves the ocean rocks. I have speci- 

 mens from Port MacDonnell, Beachport, Robe, Middleton, 

 Cape Jaffa, Cape Jervis, Second Valley, Normanville, 

 Aldinga, Marino, Venus Bay, and St. Francis Island. It 

 has also been found at Kangaroo Island and Corney Point. 

 Specimens from the last place measure 47x25 mm. Strange 

 to say, I have no specimens from Spencer Gulf. 



29. Chiton torrianus, Hedley and Hull, 1909. 



Chiton coxi, Pilsbry : Bednall, Proc. Mai. Soc, London, 

 vol. ii., part 4, April, 1897, p. 151. 



C. torri, Hedley and Hull, Records of the Australian Museum, 

 Sydney, vol. vii., No. 4, 1909, p. 262. 



C. hullianus, Iredale. Proc Mai. Soc, London, vol. ix.. part 

 2, June, 1910, p. 103. 



