136 AMERICAN JOURNAL 



DESCRIPTION OP TWO NEW SPECIES OF HELIX. 



BY A. D. BROWN. 



1. Helix Libeeijs, nob. 



Descr'q')tion.-—^. perforata, elevata, teniie, diapLana, pallide 

 cornea, superne striata, subtus leve, carinata ; spira elevata ; 

 anfr. 7 superne planiusculis, subtus convex: oribns, subex- 

 sertis, ultimo non descendente ; apertura vix obliqua, angulato- 

 lunare ; perist. simplice, margine umbilicare reflexo. 



Diam. maj. 18, min. 16, alt. 7 mill. 



Sabitat. — Cape Palmas, Liberia. 



Shell perforate, elevated, thin, diaphanous, pale horn-color, 

 above striated, beneath smooth, carinated ; spire elevated ; 

 whorls 7, above rather flat, below more convex, subexserted, 

 the last not descending ; aperture slightly oblique, lunately 

 angled ; peristome simple, with the umbilical margin re- 

 flected. 



Bears some resemblance to S. peUucida, Gld., but is 

 smaller, more coarsely striated, and much more acutely 

 carinated. The umbilicus is also much smaller, and the spire 

 more elevated. 



2. Helix Africa, nob. 



Descriptio7i. — T. perforata, tenue, superne convexiuscula, 

 subtus convexa, diaphana, cornea, costata ; spira subelevata ; 

 ai]fr. 5| convexiusculis, sensim accrescentis, ultimo non de- 

 scendente, subcarinata ; apertura vix obliqua, lunare ; perist. 

 superne breviter reflexo, ad umbilicum late reflexo. 



Diam. maj. 8, min. 7, alt. 5 mill. 



Habitat. — Great Brakke, South Africa. 



Shell perforate, thin, above slightly convex, below convex, 

 diaphanous, horn-color, costate ; spire somewhat elevated ; 

 whorls 5 1, slightly convex, gradually increasing, the last not 

 descending, subcarinated ; aperture slightly oblique, lunate; 

 peristome above slightly reflected ; at the umbilicus widely 

 reflected. 



Resembles H. PJanii, Pfr., but differs from it in being smaller, 

 more elevated, more acutely carinated, in the coarser strias, 

 and in the absence of the short hairs occurring in that species. 



