149 
cluding Kangaroo Island. I also collected it at Albany, 
Western Australia. Some very dark specimens were collected 
at Streaky Bay, which seemed a variety if not a new species. 
Under a }-in. lens the girdle scales of virgatus are minutely 
striated. Carpenter says they are not striated. I have 
counted from ten to twelve striz. 
20. Ischnochiton thomasi, Bednall, 1896. 
Ischnochiton thomasi, Bednall, Proc. Mal. Soc., London, vol. 
li., part 4, April, 1897. 
The polished mottled appearance and pearly girdle scales 
are the distinctive features of this chiton. There are several 
varieties. I have specimens from Robe, Cape Jaffa, Second 
Valley, Normanville, Aldinga, Marino, Minlacowie, Southern 
Yorke Peninsula, and Venus Bay. It thus traverses the 
greater part of the South Australian coastline. 
21. Ischnochiton resplendens, Bednall and Matthews, 1906. 
Ischnochiton resplendens, Bednall and Matthews, Proc. Mal. 
Soc., London, vol. vii., part 2, June, 1906 
After careful examination of a number of specimens of 
this very beautiful Zschnochiton I can only place it as a colour 
variety of 7. smaragdinus. While the appearance of some 
specimens varies considerably from smaragdinus, by putting 
a series, they run into one another, till it becomes prac- 
tically impossible to separate them. I have smaragdinus 
20 mm. long by 12 mm. broad, which is nearly as large as 
the type specimen of resplendens, and the colour-marking is 
hardly sufficient to make a new species. I have specimens 
from Port MacDonnell, Beachport, Cape Jaffa, Robe, En- 
counter Bay, Marino, Kangaroo Island, Minlacowie, Hard- 
wicke Bay, and Corney Point. My specimens from Robe 
resemble Mr. Bednall’s description. Specimens have also been 
taken in Wool Bay by Mr. A. R. Riddle. 
22. Ischnochiton 4a Aiilnol, 1880. 
Tonicia gryei, Filhol, Comptes Rendus, 1880, vol. xcei. (ADa 
p. 1095. TA Hlke3 
Lepidopleurus melanterus, Rochebrune, Bull. Soc. Philom., 
Paris, 1883-4, p. 37 
af faeitad aa, parkert, Suter, Proc. Mal. Soc., 1897, vol. ii., 
p. : 
I. fulwus, Suter, Journ. Malac., 1905, vol. xii., part 4, p. 66; 
Iredale, Trans. N.Z. Inst., 1907 (1908), vol. xi., p. 373, 
I. gryei, Filhol: Iredale, Proc. Mal. Soc., London, vol. ix., 
part 2, June, 1910, p. 91. 
Going through Mr. Suter’s specimens in Auckland, New 
Zealand, the author remarked that he had seen specimens 
FA 4 f 
