149 



eluding 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 J-in. lens the girdle scales of virgatus are minutely 

 striated. Carpenter says they are not striated. I have 

 counted from ten to twelve striae. 



20. Ischnochiton thomasi, Bednall, 1896. 



Ischnochiton thomasi, Bednall, Proc. Mai. Soc, London, vol. 

 ii.. 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. Mai. 

 Soc, London, vol. vii., part 2, June, 1906. 



After careful examination of a number of specimens of 

 this very beautiful Ischnochiton I can onl} T place it as a colour 

 variety of I. 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. BednalFs description. Specimens have also been 

 taken in Wool Bay by Mr. A. R. Riddle. 



22. Ischnochiton gryei, Filhol, 1880. 



Tonicia gryei, Filhol, Comptes Rendus, 1880, vol. xci., 

 p. 1095. 



Lepidopleurus melanterus, Rochebrune, Bull. Soc. Philom., 

 Paris, 1883-4, p. 37. 



Ischnochiton parkeri, Suter, Proc. Mai. Soc, 1897, vol. ii., 

 p. 186. 



I. fulvus, 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 Mai. 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 



