36 



a synonym of Chiton contractus, Reeve, Con. Icon., species 78 

 (]847), the habitat given being New Zealand. Iechnochiton 

 contractus is a common South Australian species, and is 

 credited to Tasmania by Mr. Pilsbry on the authority of 

 the Cumin cian collection. 



Ischnochiton (Ischnokadsia) NoviEHOLLANDijE (Gray 

 MSS. in Brit. Mus.), Reeve, Con. Icon. Species 142. 

 (1847). 



Chiton (Lophyrus) australis, Sowerby. Tenison Woods Census 

 of the Marine Shells of Tasmauia (1877). 



Eeceived from Captain Beddome as Chiton australis, and 

 also from Mr. W. Legrand under the same name over twenty 

 years ago. 



The following are the essential portions of the descriptions 

 of the two species, transcribed from the Manual of Con- 

 cholooy : — "Z novcehollandice.— Shell oval-oblong, elevated,, 

 the dorsal ridge angular, side slopes nearly straight ; colour 

 green, minutely marbled with olive, the lateral areas darker. 

 Lateral areas sculptured with low, unevm, somewhat nodulous 

 radiating riblets, and some concentric growth wrinkles. Central 

 areas smooth except for a very dense a?zd regular microscopic 

 granulation. End valves having radiating riblets. Interior 

 blue green, with pink and olive rays. Girdle covered with 

 smooth, solid, pebble-like scales, which toward the outer edge 

 are subcarinated. Length 43, breadth 23 mill. Adelaide, 

 South Australia." 



I may here state that there is no locality in the immediate 

 neighbourhood of Adelaide where this shell is likely to be 

 taken. 



Encounter Bay, S.A. (Dr. Perks, Professor Tate.) 



Tasmania, where apparently it is a common species. 



" /. australis. — Shell oval oblong, moderately elevated, the 

 dorsal ridge sub-angular, side slopes nearly straight. Colour 

 dark olive brown, the apices of the valves pink when eroded. 

 Lateral areas sculptured with close uneven riblets, which usually 

 bifurcate or branch freely, especially toivard the posterior margin 

 of the area. Central areas closely and evenly sculptured with 

 finer longitudinal riblets, obsolete on the ridge, where they 

 give place to a dense microscopic granulation. End valves 

 sculptured with close radiating riblets, those of the posterior 

 valves irregularly granose. Interior light blue-green, with 

 two wide pink rays in each valve, and behind them two olive- 

 brown rays. Girdle wide, closely covered with conspicuous, 



