AM E H I C A. N" 



JOURNAL OF CONCHOLOGY. 



YoL. II. JANUARY 1, 1866. No. 1. 



DESCRIPTION OP A NEW AMERICAN SPECIES OP 

 HELIX. 



BY WESLEY NEWCOMB, M. D. 



Helix Idahoexsis, Newcomb. — t. 1, f. 1, 2, 3. 



Description. — H, testa profunde umbilicata, tiirbinato-con- 

 oidea, corneo-cinerea, apice obtusa; anfr. 5 rotundatis, qiiarum 

 duobus primis laevibus vel minute oblique striatis, reliquis 

 forte costatis; costis in anfr. ultimo 20 ad 26, albis; sutura 

 bene impressa; apertura perobliqua, rotundata, que peristo- 

 mate integro, simplici, non-reflexo. 



Dimensions. — Diam. major '525 pol., minor '^o pol., axis '45' 

 pol. 



Locality. — Between Idaho Citj and Cour d'Alene Mining 

 District, Idaho Territory, (Hv Hemphill.) 



Shell deeply umbilicate, turbinately conic, ashy horn-color, 

 apex obtuse; whorls 5, rounded, the first two smooth, or mi- 

 nutely obliquely striated, the remainder strongly ribbed trans- 

 versely, numbering on the last whorl 20 to 26, of a clear white 

 color; suture well impressed; aperture very oblique and. cir- 

 cular; lip entire, simple, not reflected. 



