XXVIII. — Descriptions of two JVew Species of North American 



HelicidcB. 



By Joun H. Eedfield. 

 Read December 29lh, 1856. 



1. Helix Elliotti. 



Testa, anguste umbilicata, orbiculato-depressa, striatula, virente-cornea, 

 subdiaphana, subtus nitida ; spira convexa, parum elata ; anfractibus 

 quinque, convexiusculis, ultimo vix depresso ; sutura impressa ; apertura 

 obliqua, lunato-circulari ; peristomate sinuato, acato, intus incrassato. 



Shell, with a rather narrow umbilicus, depressed-orbiculate, 

 with fine transverse stria?, greenish horn-colored, scarcely trans- 

 lucent, shining beneath : spire convex, but not much raised ; 

 whorls five, rather convex, last one sometimes very slightly 

 deju'essed at the aperture ; suture deejDly impressed ; aperture 

 very oblique, lunate-circular ; peristome a little sinuate, acute 

 but thickened within. 



Diam. maj. 9 milliin. 



" min. 8 " alt. 4 millim. 



Habitat. — Mountains of Georgia and North Carolina, where 

 it was collected by Bishop Elliott, in great abundance, under 

 the bark of decayed stumps and logs. 



Remarks. — This shell is' easily distinguished from other 

 known N. American species, though bearing affinities to many 

 of them. It is larger, and more coarsely striated, and more 

 robust than II. aruorea Sa}', while its umbilicus spreads less, and 

 its aperture is more oblique. The same features will also dis- 

 tinguish it from // hydrophila Ingalls, and from II. Umatula 

 Ward. Moreover, the inward thickening of the peristome, 

 which is a marked feature in II. Elliotti, is wanting in all the 



