THE LAND SNAILS OF NEW ENGLAND. 667 
conical, whitish shell, having five convex whorls ; the 
spire tapering to a somewhat pointed apex. Fig. 51. 
The aperture is quite large, and is bordered by 
a widely reflected lip. The aperture is nearly 
closed with four tooth-like folds, and one is 
inclined to wonder how it is possible for the \ 
animal to protrude and withdraw his body X 
within the shell. The shell has a distinct um- 
bilicus. Length one-tenth of an inch. Animal blackish 
above ; disk light gray. Almost universally distributed 
throughout the United States east of the Rocky Moun- 
tains. It is not a common species in New England. 
Found in beech groves under bits of rotten bark. 
LEUCOCHILA ARMIFERA Say. (Fig. 55.) This is a 
much larger species than the preceding one. The shell 
is cylindrical oblong, of a waxen-white color, Fig. 5s. 
having from six to seven smooth convex whorls. 2 
Apex rather obtuse; lip reflected, nearly sur- ¢ 
rounding the aperture. Within the aperture , \y 
are four or five projecting teeth, the largest aN 
being bifid, and starting from the body whorl; in others 
projecting from the walls of the aperture, and deep seated. 
Shell slightly umbilicated. Length 7% inch; diameter 
half the length; animal black. This species appears to 
be plentiful in many of the Middle and Western States, 
extending as far east as Vermont, where it has been found 
on the shores of Lake Champlain. n 
Levcocuma peÊxToDoN Say. (Fig. 56.) This 
species is a third smaller than L. contracta, being 
only 4 of an inch in length. It has about five 
whorls ; is whitish or greenish-white ; translucent, ð 
though often obscured by dirt that adheres to its surface. 
Aperture having a thickened ridge within, on which are 
