320 FAUNA HAWAITENSIS 
var. semicarinata Newc. 
Achatinella semicarinata Newcomb, P. Zool. Soc. London, 1853 [1854], p. 156, 
ploxxivs fig. 76. 
From an examination of the very fine series collected by Mr Perkins, I think 
Newcomb was quite right in placing A. fudva and A. d/actea in the synonymy. The 
former is a straw-coloured form without banding and the latter a white form with a 
reddish-brown stain in the interior of the aperture. Mr Baldwin remarks that A. 
variabtlis is ‘invariably dextral,’ but sinistral specimens, typical in every other respect, 
were found by Mr Perkins. In placing A. semzcarinata as a variety I have been 
guided by the great difficulty I found in endeavouring to separate this form from 4. 
fSulva, the type specimens of which shew traces of the carina. 
Mr Perkins remarks that ‘the broader form with ridge more raised’ is ‘from 
higher elevations’: it appears to be gradually replaced by the form /w/va at lower 
altitudes and this latter shades into 4. varzadzlzs (typical). 
Has. Lanai (Newcomb, &c.); mountains (Perkins). 
(72) Achatinella (Partulina) virgulata Mighels. 
Partula virgulata Mighels, P. Boston Soc. 1. 1845, p. 20. 
Achatinella virgulata Mighels, Reeve, Conch. Icon. Achatznella, sp. 3; Newcomb, 
Ann. Lye. New York, vi. p. 312 [animal]; Gwatkin, P. Ac. Philad. 1895, 
p. 238 [radula]. 
Bulimus rohri Pfeiffer, Zeitsch. f. Malak. 1846, p. 115. 
Lulimus insignis Mighels, Reeve, Conch. Icon. Achatinella, sp. 3. 
Has. Molokai, Kaluaaha to Halawa (Baldwin); Mapulehu and mountains 
(Perkins). 
It is a very variable species and the following, which I take to be a variety, is 
perhaps worthy of note. 
var. a. Either entirely white or slightly tinted with brown on the last whorl; 
mouth varying from dusky to white; the spiral black line on the upper whorls either 
present or absent. 
Has. Molokai, Pelekunu (Perkins). 
subgen. ACHATINELLASTRUM Pfeiffer. 
Achatinellastrum Pfr., Malak. Blatt. 1. (1854), p. 133 (first species A. venulata 
Newc.). 
