267 



perfect colour protection as they occupy slight hollows in the 

 pink calcarious algae that encrust the rocks. 



Eudoxoflax inornatus, Ten. Woods. Although we found 

 one or two specimens it is evidently rarer than at the more 

 southerly locality. 



Callistochiton mawlei, Ire. and May. Three specimens 

 were found in the deepest water reached, an interesting 

 extension of its habitat; previously it had only been 

 recorded from Port Arthur and Norfolk Bay. 



Acanthochiton gatliffi, Ashby. A very fine specimen of 

 this rare Acanthochiton was obtained, making the first record 

 for the State of Tasmania. When dry it measures just over 

 8 mm. in length and 4 mm. in width. The method of sculp- 

 ture is quite typical, the delicate pink colour of the type is 

 quite absent; in this the ground-colour is cinnamon-brown, 

 blotched with darker brown. A large percentage of the 

 granules of the dorsal area and the large flat pustules of the 

 other areas are white, from opaque-white to semi-transparent 

 white, but some are very dark brown. So many of the inter- 

 spaces were filled in with sand granules that, until they had 

 been cleaned away by boiling, the identification was quite 

 uncertain. The shell was found on the upper side of a rock 

 brought up at the lowest tide by Mr. May, and I recognized 

 it at once as one of our rare Acanthochitons . With the excep- 

 tion of the specimens I collected at Port Lincoln in South Aus- 

 tralia, the only other known ones have been found in Victoria, 

 which makes this a very interesting addition to the fauna of 

 Tasmania. The median valves in the specimen under review are 

 not as ''bow shaped" on the posterior margins as are the 

 Victorian specimens, but are almost straight, except for the 

 beak, which is normal. 



Amaurochiton glaucus, Gray. A few specimens were 

 found here in fairly shallow water. This is probably the 

 southern limit of its present range. At Bellerive, opposite 

 Hobart, it is very numerous, and is believed to have been 

 originally introduced with ballast from New Zealand over 

 thirty years ago. The ballast was unloaded at Bellerive, and 

 this chiton has increased most extensively in that locality, 

 and has slowly extended its range down the Derwent and in 

 at the entrance of the D'Entrecasteaux Channel until it has 

 reached as far as Woodbridge. It will be very interesting 

 to watch the extension of its habitat, by which it will be pos- 

 sible to compute the rate a species may extend its range under 

 favourable conditions. 



Mr. May writes me as follows: — "It might be well to 

 add that in addition to the species we collected, the following 

 are known to occur in the Channel : Ischnochiton falcatus. 



