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-eonie, solid, .shining, stri- 

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

 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 unrefledted, 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. emerso?iii Newc. of Kawailoa. 



