420 Binney's Monograph of the Helices 
breaking the smoothness of the surface ; whorls five; 
suture not much impressed; aperture transverse, 
with a thick, white, testaceous deposit around its 
whole inner surface a little distant from the margin; 
lip thin; acute, fragile, its lower part reaching to the 
centre of the base; wmbilicus small; base rather 
flattened, indented in the centre. 
Greatest transverse diameter less than three fourths 
of an inch. ; okt 
- GEOGRAPHICAL Distrisution. Inhabits the West- 
ern States. pp a 
Remarks. This shell resembles the preceding, , 
with which it is often confounded ; it is, however, 
 Oftener taken to be Heuix gläphyra of Say, by 
the naturalists of the West, where the latter, being 
an introduced species, (Hexrx cellària, MúLLER,) 
common only near the sea shore in cellars and gar- 
dens, is not found. Though resembling Hexrx fuli- 
ginòsa in general appearance, it may be distinguished 
by the number of whorls, which are five, but which 
in that species, in specimens twice as large, but little 
exceed four. Its aperture is much less circular, the 
transverse diameter being considerably the greatest; 
the umbilicus is smaller, being nearly closed and 
more profound ; the volume of the last whorl is less 
in proportion to the size of the shell; the base Js 
flatter; the color lighter, and without the smoky 
appearance of the former species. ; 
