Pe Pee Ce Ba | kee oe os i 
: a v o ptt alg “ NITLCLES. 109 
IhawiarwaAe 4 :x Ba ys pee ae 
arly to the Crepidula convera, and in- 
deed it is with some doubt that separate it. But the two sides are 
alike in their curvature, the outside smooth, the cyathus diapha- 
nous and not so deeply situated, the color usually much darker, 
nd the apex straight. Besides this, its habitat seems different, 
GENUS FE tal IR Bs 
C. evile. -Pi. 1, fig. 5 a: 
C. testa ovato-conica, valde elevata, celaaehtannil dinptinnhy, 
albida, longitudinaliter striata; spira obtusa; anfractibus senis, 
convexis ; suturis impressis ; apertura eiintich, integra, dentibus 
tribus ; labio valde reflexo. 
Shell ovately conical, much cigxiaed »sub-perforate, diapha- 
nous, whitish, longitudinally striate; spire obtuse ; whorls six, 
convex ; sutures impressed ; mouth tical: entire, with three 
teeth ; lip much reflexed. : 
Length ‘075. Breadth -025 of an inch. 
_. Hab. Under dead leaves and mould, on the Wissahiccon creek, 
near Philadelphia. Cabinet of I. Lea. 
Remarks.—This beautiful little shell bears a strong resem- 
blance to tha Pupa evigua of Say, and it is with some doubt 
that I propose it. The chief points in which it differs from that 
shell are the following. The lip is continuous round the mouth, 
and not interrupted by the last whorl, as is the case with the 
Pupa, thus being a true Carychium ; the lip is flattened, the 
number of whorls is greater, there is a tooth on the outer lip, the 
size is smaller, and the shape more elongated. It also nearly ap- 
proaches the Carychium minimum, Leach, an European shell, 
but may be easily distinguished by its strie, shape, number of 
whorls, perforation, and teeth. The tooth on the outer lip is very 
variable, being sometimes almost obsolete and sometimes larger 
than those on the inner one. Of the two teeth on the inner lip, 
ohne is placed at the middle, and the other very near the base of 
mu the mouth, and so far in as to be almost invisible on a front view. 
The mouth is ‘02 of an inch in length. It appears to be the 
only true Carychium yet found in the United States, its small 
perforation, hardly amounting to an umbilicus, not being suffi- 
sient to ceparags itefae that genus. Jn its shape and yf it 
cenne (°/, isum, 
aes meet VSS the ge it Oem eeetes PEE Oe ee = 
