376 Transactions. 



Chiton aereus, Reeve. 

 Chiton cereus, Reeve, Suter, Proc. Mai. Soc, vol. ii, p. 195, 1897. 



Suter's references refer to this species, though his letterpress 

 does not, as has since been pointed out by himself. The follow- 

 ing year Suter queried New Zealand as the habitat of this species 

 (Trans. N.Z. Inst., vol. xxxi, p. 63, 1898 [1899] ), yet on the east 

 coast of the South Island this species cannot be considered 

 rare. I can get specimens any day I wish in Lyttelton Harbour, 

 and have obtained specimens at every other locality I have 

 visited on Banks Peninsula. It is common at Shag Point, 

 Otago, and all round the Otago Peninsula. 



.The normal colouring of this Chiton is a bluish-green, some- 

 times with the girdle marked with white. Yellow-green occurs 

 in some localities ; pure-lemon-yellow, yellowish-white, pure- 

 white, puce- coloured, and bright-red-brown specimens are also 

 rarely met with. In Otago, however, shells occur which I call 

 albinos. So far I have obtained five distinct types. The 

 general appearance of the shell is white : first, in which the 

 whole is splashed with greenish-black ; then, the valves are 

 pure-white, with the girdle blackish-brown; next, the shell is 

 pure-white with a greenish tinge, the girdle green-and-white ; 

 a fourth has the valves speckled with green and suffused with 

 yellow, the girdle green-and-white ; lastly, the valves suffused 

 with greenish and the girdle pink. 



^Acmaea rubiginosa (Hutton). 



Acmcea rubiginosa (Hutton), Suter, Proc. Mai. Soc, vol. vii, 

 p. 315, 1907. 



Upon shells of Haliotis iris, Martyn, at Lyttelton occur 

 Acmceas. I separated them as lacunosa (= rubiginosa) and 

 cingulata. Upon reading Suter's paper I re-examined my 

 specimens, comparing them with undoubted specimens of A. 

 rubiginosa, Hutton, from the Chathams, with the result that I 

 consider my shells identical. At Shag Point, Otago, I first 

 found dead shells and then live ones on Haliotis iris again. 

 The dead shells are inseparable from the dead shells from the 

 Chathams. 



Acmaea cantharus (Reeve). 



Acmcea cantharus (Reeve), Suter, Proc. Mai. Soc, vol. vii, p. 320, 



1907. 



In the paper quoted Suter restricts A. cantharus, Reeve, 

 to New Zealand. As in that paper he does not discuss the 

 relationships of the shells listed in Australia under that name, 

 I here do so. That this is necessary for the understanding of 



