Original Descriptions of Achatinella. 77 



in. Achatinella formosa Gulick. 



A.formosa Gk. Ann. L,yc. New York, vol. vi, 185S, p. 235, pi. viii, fig. 55. 



Shell sinistral, imperforate, aeumiuately ovate, solid, shining, 

 striated, white, with two black bands, one entering the aperture, 

 sometimes with the upper part of the whorl of a pale slate color ; 

 apex somewhat acute ; spire convexly conic ; suture marginate, 

 well impressed; whorls 6 1-2, convex; columellar fold central, 

 white, strong ; aperture truncately auriform, white within ; peris- 

 tome thickened within ; with external margin unreflecled, arcuate, 

 acute; with columellar margin dilated, adnate ; parietal margin 

 wanting. 



Length 0.80 in. (20 1-3 mill.), breadth 0.42 in. (10 2-3 mill.). 



Length of body whorl 0.55 in. (14 mill.). 



Average weight 6.00 grains. 



Var. B. With the two bands uniting in one broad black belt. 



Var. C. With numerous black spiral lines. 



Station. On the Ki ( Cordylinc tcrminalis) and other leaves. 



Remarks. A rare species, and of great interest on account of 

 its affinities, which connect it with species so different from each 

 other. A. glauca, delta, ph&ozo?ia, and zonata are certainly not 

 very similar ; but this species seems to connect itself directly with 

 varieties of each of these species. — Gk. 



Hab. Waimea. — Gk. 



112. Achatinella csesia Gulick. 



A. c&sia Gk. Ann. Lye. New York, vol. vi, 1858, p. 234, pi. viii, fig. 53. 



Shell sinistral, imperforate, ovate-conic, solid, shining, stri- 

 ated, so streaked with white and fawn as to have a grey appear- 

 ance ; apex somewhat acute ; spire convexly conic ; suture mar- 

 ginate, moderately impressed ; whorls 6 1-2, convex ; columellar 

 fold central, white, moderately developed ; aperture siuuately 

 oval, white within ; peristome thickened within ; with external 

 margin unreflected, arcuate, acute, edged with brown ; columellar 

 margin dilated, adnate ; parietal margin wanting. 



Length 0.72 in. (18 1-3 mill.), breadth 0.42 in. (10 2-3 mill.). 



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



Average w r eight 4.00 grains. 



Remarks. This with A . concidens and A . formosa Nob. , which 

 are found in Waimea, correspond to A . undulata Newc, A. emer- 

 sonii Newc, A. glauca Nob. found in Kawailoa. — Gk. 



Hab. Waimea. — Gk. 



