HELIX CLAUSA. 



DESCRIPTION. 



Sfiell rather fragile, slightly perforated, subglobular, yel- 

 lowish horn-color; above convex: ivhorls four or five: 

 aperture slightly contracted by the labrum : labrum re- 

 flected, flat, white, at base nearly covering; the umbilicus. 



SYNONYM. 



H. CLAUSA, Nob. Jmirn. Jicad. Nat. iSc. Vol. 2, p. 154. 



OBSERVATIONS. 



This species occurs in several parts of the Union, and 

 particularly in the Western States. It is a pretty species, 

 rnuch like aibolabris. Nob. but is smaller, more rounded 

 and is subumbilieato. 



REFERENCE TO THE PLATE. 



I'iif. 1, Front and inferior Tiewc. 



y\ 36, 



