45 



Acanthochiton kimberi, Torr. — I am glad to be able to 

 add this somewhat rare Acanthochiton to the fauna of Wes- 

 tern Australia. Two specimens in an excellent state of pre- 

 servation were secured at Yallingup; they show none of the 

 erosion which so often mars the shells of this species. The 

 nearest locality from which this species has heretofore been 

 taken is St. Francis Island, in South Australia, so that the 

 extension of its range to the west coast of Western Australia 

 is very interesting. 



Acanthochiton (Notoplax) sub-viridis, Torr. — This inter- 

 esting shell was described by Torr (loc. cit.) from specimens 

 taken by himself at Albany, on the south coast. We have 

 now taken it on the west coast, at Yallingup ; the onlv pre- 

 vious specimens known were those taken by Torr at Albany. 



Rhyssoplax torrianus, Hed. and Hull. — A nice series 

 were taken at Yallingup, where Dr. Torr also took it in 1910. 



Onithochiton scholvieni, Thiele. — This large Onithochiton 

 was common on the face of the exposed reef at Dongarra, 

 making it difficult to get with the surf breaking over them; 

 it adhered very tightly to the hollows in the fretted limestone 

 reef. I believe it has not before been recorded further north 

 than the neighbourhood of Perth. 



Liolophura georgiana, Quoy and Gaim. — This species was 

 very common on the rocks that were fully exposed at low 

 tide at Ellensbrook, Yallingup, Cottesloe, and Dongafra. The 

 larger specimens were always more or less eroded. Small 

 specimens, on the other hand, are beautifully sculptured. 



On examining Torr's type of Plaxiphora pustulosa, 

 described from one median valve only (loc. cit., p. 107), the 

 presence of "eyes" in the lateral areas was at once apparent, 

 and suggested its true nature. On comparing it with a well- 

 preserved example of similar age of L. georgiana, its identity 

 with it was evident; Torr's example is probably valve No. 5 

 of that species. 



Had Dr. Torr seen the whole shell the mistake, of course, 

 would never have occurred. The accident is not without its 

 compensating features, for I believe no recent first-class figure 

 exists of this shell, so Torr's excellent drawing of the median 

 valve (loc. cit., pi. xxv., fig. 7) under the name Plaxiphora 

 pustulosa will always be of use to collectors. 



Crytoplax striatus, Lamark. — One specimen only from 

 the east side of Rottnest Island. The only other record of 

 this common eastern species is that given by Dr. Torr, who 

 took it at Hopetoun and Yallingup. 



