OF CONCHOLOOY. 303 



DESCRIPTION OP A NEW SPECIES OP HELIX. 

 BY GEORGE W. TRYOX, JR. 



Helix Bridgesi, Tryon. — t. 20, figs. 9-11. 



Description. — Discoidal ; whorls 4, rather convex, striate, 

 spire not elevated, suture deeply impressed ; umbilicus wide 

 and rather deep; aperture oval, small; lip not expanded. 

 Light horn-color, with revolving brown bands, a narrow 

 and then a broader one above the periphery, and three equi- 

 distant below it, the one nearest the umbilicus indistinct. 



Dimensions. — Diameter 9, height 3 mill. 



Habitat. — Nicaragua, (Bridges.) 



My Cabinet. 



Observations. — I can find no species with which this is very 

 closely allied, except Helix Chiapensis, which is, however, 

 differently banded, and has a norrower umbilicus. Several 

 other species of land and fluviatile shells, brought from Nica- 

 ragua by the late lamented Bridges, remain to be determined, 

 and some of them will probably prove to be new. 



