96 



Three specimens collected. It is common in New South 

 Wales, rare in the Adelaidean and Western Australian 

 regions. Specimens obtained at Rabbit Island (Albany),. 

 Ellenbrook, and Rottnest Island. Colour markings resemble 

 New South Wales species. Dark-red with splashes of orange 

 and olive-green. About 20 valves of a bright-pink colour,, 

 picked up at Ellenbrook, were evidently bleached specimens 

 of platessa. 



2. Ischnochiton (Stenochiton) juloides, Ad. and Ang.,. 



1864. 



Stenochiton juloides, Ad. and Ang., Proc. Zool. Soc, 1864,. 

 p. 193; Pilsbry, Man. Conch., ser. i., vol. xiv., p. 55. 



Two anterior valves and one median valve of this very 

 slippery chiton were collected in shell-sand at Albany. 



3. Ischnochiton cariosus, Carpenter, 1873. 



Heterozona cariosa, Carpenter, MS.; Pilsbry, Man. Conch.,, 

 ser. i., vol. xiv., p. 65. 



Numbers of these were found at Rottnest Island, Albany ,. 

 Hopetoun, Yallingup, and Ellenbrook (south of Cape Natu- 

 raliste). The Western Australian specimens are much less- 

 coated with serpularia, etc., than the South Australian 

 species. 



4. Ischnochiton ustulatus, Reeve, 1847. 



Chiton ustulatus, Reeve, Conch. Icon., sp. 102; Pilsbry, Man. 

 Conch., ser. i., vol. xiv., p. 96. 



Several specimens were taken on the west coast at Rott- 

 nest Island and Yallingup. None were found on the south 

 coast. This chiton travels easily. One collector reports 

 finding them in abundance at one spot in South Australia,, 

 but they had all vanished a few days later. 



5. Ischnochiton crispus, Reeve, 1847. 



Chiton crispus, Reeve, Conch. Icon., sp. 120; Pilsbry, Man. 

 Conch., ser. i., vol. xiv., p. 89. 



Ischnochiton Haddoni, Pilsbry, Man. Conch., ser. i., vol, xiv., 

 p. 88. 



The specimens classified as /. crispus are either so small 

 or in such bad condition that I have hesitated in allowing 

 crispus to appear at all. They were found only in the places 

 examined nearest to the South Australian border, Esperance 

 and Hopetoun. It is interesting to find that a chiton so 

 common in South Australia and Victoria should be so rare 

 in Western Australia. The specimens found closely resemble 

 our South Australian I. variegatus, which is probably only 

 a. variety of I. crispus. 



