74 Original Descriptions of Achatinella. 



auriform, white within ; peristome slightly thickened within ; with 

 external margin unrenewed, arcuate, acute ; columellar margin 

 dilated, adnate ; parietal margin very thin. 



Length 0.71 in. (18 mill.), breadth 0.41 in. (10 2-5 mill.). 



Length of body whorl 0.50 in. (13 mill.). 



Average weight 4.40 grains. 



Var. B. With a black sutural band ; columellar fold usually 

 white, sometimes lilac. 



Var. C. Yellow, with smoother surface, approaching A. recta 

 Newc. 



Station. On the trees of the Pua, Ahakea, and Ohawai {Lo- 

 belia grimesiana) , 



Remarks. Dr. Newcomb has placed this with A. curta Newc, 

 but I consider it quite distinct. About a fifth of my specimens 

 are dextral. — Gk. 



Hab. In the forest between the streams of Waimea and Ka- 

 wailoa. — Gk. 



This shell seems to connect this group with the albescens group 

 of shells found near Waimea and Kahuku. 



ALBESCENS GROUP. 

 106. Achatinella albescens Gulick. 



A. albescens Newc. Ann. I,yc. New York, vol. vi, 1858, p. 237. pi. viii, fig. 57. 



Shell sinistral, sometimes dextral, imperforate, ovate-conic- 

 solid, shining, striated, white or sometimes yellowish ; apex some, 

 what acute ; spire convexly conical ; suture marginate, well im- 

 pressed ; whorls 6, somewhat swollen beneath the suture, and 

 slightly flattened in the middle ; columellar fold central, white, 

 strong; aperture truncately auriform, white within; peristome 

 thickened within ; with external margin unrefleeted, slightly arcu- 

 ate ; columellar margin dilated, adnate ; parietal margin wanting. 



Length 0.70 in. (18 mill.), breadth 0.42 in. (10 2-3 mill.). 



Length of body whorl 0.51 in. (13 mill.). 



Average weight 4.60 grains. 



Station. On the leaves of the Pua, Ahakea, and Lama. 



Remarks. Nearly a third of the specimens from Waimea and 

 Pupukea are dextral, but in Waialee, the metropolis of the species, 

 they are always sinistral. — Gk. 



Hab. Waimea, Pupukea, Waialee, Kahuku, and Hauula. 

 — Gk. 



