41 



As a result of the total collecting several species are 

 added to the Western Australian fauna, the range of others 

 greatly extended, and several outstanding problems solved. 

 Altogether nineteen species were collected. 



My acknowledgments are due to Dr. Torr for the oppor- 

 tunity of examining his types and the data attached thereto, 

 and to Mr. L. Glauert, of the Western Australian Museum, 

 for the loan of the type of Litcilina delecta, Thiele, and 

 other specimens. 



Callochiton platessa, Gld. — One small specimen was 

 secured at Yallingup. I have collected this shell in New 

 South Wales, and from there to Western Australia, including 

 Tasmania, and also have specimens from New Zealand, so 

 probably it has the widest range of any of our chitons. The 

 specimen under consideration was adhering to a rock covered 

 with pink calcareous algae; evidently a case of colour pro- 

 tection. 



Stenochiton posidonialis, Ashby. — •One specimen was 

 taken at Dongarra, living on a stronger form of Posidonia 

 than is met with in South Australia. It grew in a fairly 

 sheltered situation inside the reef. The first record of the 

 occurrence of this and the following species in the waters of 

 the Western State is contained in my paper (Jour, and Proc. 

 Roy. Soc, W. Austr., vol. vi., 1920). The present discovery 

 extends its range for nearly 300 miles northwards. 



Stenochiton cymodocealis, Ashby. — One specimen was 

 taken on a very fine form of Gymodocea, growing in a shel- 

 tered situation close to the harbour at Geraldton, thus 

 extending its range for more than 300 miles northwards. 



Ischnochiton torri, Ire. and May. — One taken at Yal- 

 lingup; Torr also recorded it from the same locality. 



Ischnochiton virgatus, Reeve. — I found this charming 

 little Ischnochiton fairly numerous at Ellensbrook; this is 

 the first published record of its occurrence on the west coast 

 of this State. 



Ischnochiton (Haploylax) resplendens, Bed. and Mat. — 

 A nice series of this handsome chiton was obtained on the 

 smooth granitic rocks at Yallingup. Although all were darker 

 in coloup than is typical they show the same minute sculpture 

 and highly ornamental markings, consisting of blue spots 

 and varied streaking, that is characteristic of the South 

 Australian shell. They are evidently a larger race, measuring 

 up to 30 x 17 mm. 



Ischnochiton (Heterozona) cariosus, Pils. — I found it 

 numerous on the granite rocks at Ellensbrook and Yallingup, 



