228 Descriptions of New Species of Achatinella. 



mellari mediana, fusca, vcl alba, mediocri; apertura obliqua, sinnato- 

 ovali, intas alba, ; perist. intus incrassato ; margine externo recto, arcuato, 

 acuto ; columellari dilatato, adnato, fusco-limbato ; parietali nullo. 



Shell sinistral, imperforate, oblong conic, solid, shining, 

 finely striated, green, yellow, or white, with three black spiral 

 bands, one sutural, one entering the aperture, the other revolv- 

 ing above the suture ; apex obtuse ; spire turreted ; suture 

 margined, moderately impressed ; whorls 6, convex ; colu- 

 mellar fold central, brown or white, moderately developed ; 

 aperture oblique, sinuately oval, white within ; peristome 

 thickened within ; with external margin unrefiected, arcuate, 

 acute ; columellar margin dilated, adnate ; edged with brown ; 

 parietal margin wanting. 



Length 0.72 inch (18£ mill.) ; breadth 0.37 inch (7| mill.). 



Length of body whorl 0.48 inch (12 mill.). 



Average weight 4.80 grains. 



•s^ 



Station. — On various trees and shrubs. J. T. G. ! 

 Habitat. — Halawa, Oahu. J. T. G. ! 



Var. a. — Yellowish white. 



Yar. b. — Brown yellow. 



Var. c. — Green. 



Var. d. — Green or yellow at the base, and white above. 



Var. e. — With but one or two black bands. 



Var.f. — With four or five black bands. 



Remarks. — Inhabits ravines near the centre of the main 

 mountain ridge of Oahu, and is allied to A. colorata Reeve 

 and A. cuneus Pfr., from that region, but represents, in its 

 bands and general style of coloring, A. trilineata Nob., one of 

 the group of larger shells found in the more eastern valleys. 



I have before me one dextral specimen. 



