100 



22. Cryptoplax striatus, Lamarck, 1819. 



Chitonellus striatus, Lam., An. S., Vert, vi., p. 317, 1819. 



Cryptoplax striatus, Pilsbry, Man. Conch., ser. i., vol. xv.. 

 p. 53. 



This chiton was taken at Hopetoun, on the south coast, 

 and at Yallingup, on the west coast. Valves were obtained 

 at Hopetoun, Ellenbrook, and dredged from 20 fathoms in 

 Geographe Bay. I concur with Messrs. Gatliffe and Bastow, 

 of Melbourne, in placing the hairy, seal-like specimens with 

 striatus and the hairless one with var. Gunnii, of Reeve. 



23. Cryptoplax striatus, var. gunnii, Reeve. 

 Chitonellus gunnii, Reeve, Conch. Icon., sp. 5. 

 Cryptoplex striatus, var. Gunnii, Pilsbry, Man. Conch., ser. 

 i., vol. xv., p. 54. 



Two specimens of this hairless species were found at 

 Yallingup. They are both destitute of the "minute cal- 

 careous spinelets" of striatus. The valves are narrower, and 

 in both specimens of a deep-pink colour. When examined with 

 striatus they seem worthy of being placed in a distinct 

 species. 



Note. — The foregoing 23 species are all found in South 

 Australian waters. 



24. Liolophura georgianus, Quoy and Gaimard, 1835. 



Chiton Georgianus, Quoy and Gaim., Voy. "Astrolabe," Zool., 

 1835, iii., p. 379, t. 75, f. 25-30. 



Liolophura Georgiana, Quoy and Gaim. ; Pilsbry, Man. 

 Conch., ser. i., vol. xiv., p. 241. 



Chiton Georgianus, Iredale, Proc. Mai. Soc, London, vol. 

 ix., part 3, September, 1910. 



The type specimen was found by Quoy and Gaimard at 

 King George Sound, South-west Australia (Port du Roi- 

 Georges). Mr. Iredale says that the type appears to have 

 been lost. It is the commonest chiton in Western Australian 

 waters. The specimens I have dissected correspond to Quoy 

 and Gaimard 's description. It certainly is not a true chiton, 

 and I have not been able to discover the presence of eyes 

 necessary to place it among Liolophura; but this may be 

 accounted for by the fact that it is exceedingly difficult to 

 get a clean specimen. They are either very much eroded or 

 covered with calcareous matter and other foreign growths. 



I have been assisted in my nomenclature by Messrs. 

 Hedley and Hull, of Sydney. 



L. georgiana was seen in every place visited, Esperance, 

 Albany, Ellenbrook, Yallingup, and Rottnest Island. Some 

 years ago one specimen with the girdle removed was sent to 



