MOLLUSC A 299 



(3) Achatinella apicata (Newcomb MS.) Pfeiffer. 



Achatiiiella apicata Pfeiffer, P. Zool. Soc. London, 1855 [1856], p. 210. 

 Hab. Oahu, Halemano (Perkins). 



van polynnorpJia, Gulick. 



Apex polymorpha Gulick, P. Zool. Soc. London, 1873, p. 81, pi. x. fig. 5. 



Hab. Oahu, Wahiawa, Kalaikoa, Ahonui (Gulick) ; Kawailoa Gulch, and above 

 Ewa (Perkins). 



van vespertina Baldwin. 



Achatinella {Apex) vespertina Baldwin, P. Ac. Philad. 1895, P- 219 [shell and 



animal], pi. x. fig. 14. 

 Hab. Oahu, Kawailoa (Baldwin) ; from a ridge between Waala and Kawailoa 

 Gulches (Perkins). 



var. alba, var. n. 



Shell snow-white, save for the peristome being margined with lilac, similar tinting 

 appearing on the columella plait, and inside the outer lip at its junction with the body- 

 whorl of the shell. 



Hab. Oahu, near head of Kawailoa Gulch (Perkins). 



A fine series of this species. It appears to be distinct from A szuiftii Newc. 

 \^=A. cestus Newc. var.], to which Newcomb subsequently referred it, and the type of 

 which I have examined. The shell is larger, different in form, and more polished, the 

 ground colouring darker, and the banding not so conspicuous in the typical form : 

 the protoconch is in general brown, and but rarely white. The prevailing tint 

 is brown, sometimes becoming black with a white area below the suture, rarely 

 altogether snow-white. A few, from near Kawailoa, are tinted with lilac on an 

 ashy ground, occasionally having a chestnut sutural line ; these form a passage to 

 A. vespertina Baldwin, in which the lilac tint has changed to cream-colour. This 

 latter is the only form in which the animal appears to have been noticed. 



(4) Achatinella bicolor (Gulick) Pfeiffen 



Achatinella bicolor Pfeiffer, Mon. Hel. Viv. iv. 1859, p. 529. 

 Near, apparently, to A. cookei Baldwin. 

 Hab. Oahu, Lehui (Pfeiffer). 



