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 cereus, 
Reeve, from New Zealand, but there are marked differences. 
Av 7KO28.-Chiton jugosus, Gould, 1846. Vinee Les 
Chiton jugosus, Gould, Proc. Boston Soc. Nat. Hist., 11.; 
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; Bednail, Proc. Mal. 
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. FsGs 
L. concentricus, P.Z.S., 1867, p. 221. 
Hedley and Hull’s comparison of C. jugosus, C. torri 
(torrianus), and CV. covi,in Records Australian Museum, vol. 
vil., 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. 
Av7T we 29-Chiton torrianus, Hedley and Hull, 1909. PSS G4 
Chiton coxi, a Bednall, Proc. Mal. 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. Mal. Soc., London, vol. ix., part 
2, June, 1910, p. 103. 
