162 
49. Acanthochitss (Notoplax) wilsoni, Sykes, 1896 AfZ4 
‘ Acanthochites (Notoplax) wilsoni, Sykes, Proc. Mal. Soc., 
London, vol. ii., part 2, July, 1896, p. 92, Be vi., figs. 2, 2a. 
A. verconis, Torr and Ashby, Trans. Roy. Soc., S.A., 1898, 
p. 217, pl. vi., figs. 4a-/. 
T have to thank Mr. Hedley for drawing my attention 
to the similarity between A. wilsoni and A. verconis. I have 
gone through a number of specimens. There is a great differ- 
ence between the small and large specimens in colour- 
markings, the smaller being pearly-white mottled with rose- 
pink and seemingly more carinated, while the larger speci- 
mens are reddish to a deep maroon tint. 
Taken in dredgings in St. Vincent and Spencer gulfs 
by Dr. Verco, by Mr. Ashby at Aldinga, Mr. Kerrison at 
Cape Jaffa, by Mr. Basset Hull on Long Reef (New South 
Wales), and by the writer at Robe, Marino, Kingscote, and 
Minlacowie. 
Sykes’ description is ably assisted by Mr. Hedley’s draw- 
ings in Torr and Ashby’s paper, loc. cit. 
50. AcanthochitSe’ maughani, Torr and Ashby, 1898 37g 
Acunthochites maughani, Torr and Ashby, Trans. Roy. Soc., 
S.A., 1898, p. 218, pl. vii., figs. 5a-f; Hedley and Hull, ords 
Australian Museum, vol. vii., No. 4, 1909, p. 265. 
This species has been found only at Port Victor 
(Maughan), Bottle and Glass Reef, and Freshwater Bay, 
New South Wales (Hedley and Hull). I have a number of 
New South Wales specimens in spirits. 
Atanthochites lachrymosus, May and Torr, just being 
publislfed (1912) by the Royal Society of Tasmania, is some- 
what similar to 4. maughani. The shell is much larger, 
26x10 mm., but on comparing a co-type with the type of 
maughani, though there is a striking resemblance in detail, 
there are decided differences. 
5|. Acanthochites—exitis Torr and Ashby, 1898. 2572-3 
Acanthochites ewilis, Torr and Ashby, Trans. Roy. Soc., 8.A., 
1898, p. 218, pl. vii., figs. 6a-f. 
Three specimens of this very diminutive chiton were 
dredged by Dr. Verco in 15 fathoms in Spencer Gulf. It is 
the smallest of all our South Australian Polyplacophora, and 
may be easily distinguished by the bright-red dorsal area of 
the third valve. One very handsome specimen, measuring 
3x2 mm., was dredged by Dr. Verco in 15 fathoms off 
Wallaroo. 
