78 Original Descriptions, of Achatinella. 



113. Achatinella concidens Gulick. 



A. concidens Gk. Ann. Lye. New York, vol. vi, 1858, p. 234, pi. viii, fig. 54. 



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

 ated, brown banded with white ; apex somewhat acute ; spire con- 

 vexly conic ; suture marginate, white, moderately impressed ; 

 whorls 6 1-2. convex; columellar fold central, white, moderately 

 developed ; aperture truncately oval, white within ; peristome 

 thickened within ; with external margin unreflecfled, arcuate ; col- 

 umellar margin dilated, adnate ; parietal margin wanting. 



Length 0.79 in. (20 mill.), breadth 0.43 in. (11 mill.). 



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



Average weight 4.75 grains. 



Remarks. My specimens of this species are more or less 

 bleached and faded. Continued search was made for living speci- 

 mens, but without success. — Gk. 



Hab. Waimea. — Gk. 



Corresponds to A. cnicrsonii Newc. of Kawailoa. 



