94 Original Descriptions, of Achatinella. 



columella short, robust, expanded, and terminating in a twisted 

 plait ; colour bluish slate, much lighter on the upper portion of the 

 whorls; sometimes transversely banded with white or chestnut. 

 Long. 17/20, lat. 9/20 poll. 



Hab. Kolaupoko. — Newc. 



145. Achatinella platystyla Gulick. 



.1. platystyla Ok. Ann. Lye. New York, vi, 1856, p. iyb, pi. vi, fig. -'.s. 



Shell dextral, perforate, elongately ovate, rather thin, shining, 

 finely striated, microscopically very faintly decussated, pale brown 

 above, ash-brown at the base ; apex rather obtuse ; spire convexly 

 conic; suture scarcely marginate, well impressed; whorls 6 1-2, 

 convex ; columellar fold central, white, slightly twisted ; aperture 

 a little oblique, semioval, bluish white within ; peristome yellow- 

 ish white, thickened within ; with dextral margin anteriorly re- 

 flected, arcuate ; columellar margin broadly reflected, flattened, 

 not appressed ; parietal margin very thin. 



Length 0.80 in. (20 1-3 mill.), breadth 0.41 in. (10 2-5 mill.). 



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



Average weight 4.50 grains. 



Remarks. A rare mouse-colored species, in affinity nearly 

 allied to A. dubia Newc, but in color bearing a striking resem- 

 blance to A. glabra Newc, a shell of quite another group, found 

 in the same locality with this. — Gk. 



Hab. Kawailoa. — Gk. 



This seems to be the same as A, glabra Newc. Both New- 

 comb and Sykes consider it so. 



146. Achatinella elegans Newcomb. 



A. elegans Newc. P. Zool. Soc. London, 1853, p. 149, pi. xxiv, fig. 57- 



Shell conically elongate, polished, shining, rather solid ; 

 whorls 6, plano-convex, margined above ; suture well impressed ; 

 aperture subovate ; lip white, expanded, subreflected, somewhat 

 contracted in its centre, thickened within ; columella short, flat 

 and lightly toothed; colour light and dark brown alternating, longi- 

 tudinally arranged in liueations or broad patches ; sometimes with 

 a white sutural band, and an additional one on the body whorl. 

 Long. 18/20, lat. 8/20 poll. 



Hab. Hauula. — Newc. 



