CONCHOLOGIA) CESTRICA. 65 
Whether (as has been alleged) L. elodes, Say, and L. 
catascopium, Say, are mutually convertible species, we 
are, at present, unable to decide. 
LL. refleza, SAY. 
Lymneus reflexus, Say, Jour. Acad. Phila. F.S., II., 1821. 
Shell, much elongated, pale brownish; jaacens 
whorls 6, oblique; spire one and a half the Fig, 124, 
length of the aperture, slightly reflected from 
the middle; two or three terminal whorls vit- 
reous; aperture narrow; lip with a pale mar- 
gin, and colored sub-margin. H. 30, W. Io, 
mill. 
Station, in lakes and ponds. New Garden, 
Chester County. 
L. desidiosa, Say. 
Lymineus desidiosus, Say, Jour. Acad. Phila. F. S., IL, 
1821. 
Shell, oblong, sub-conic, thin, brownish, ee 
or light ochraceous; whorls 5, convex; o, 125 
suture deep; lines of accretion coarse, with 
a tendency to form facets, on the body 
whorl; spire rapidly attenuated to an acute 
point, as long as the aperture; columellar 
fold slight; umbilicus small. H. 8, W. 4%, mill. 
Station, ponds and streams. Chester County; common. 

L. humilis, Say. 
Lymneus humilis, Say, Jour. Acad. Phila. F.S., IT., 1822. 
Shell, ovate-conic, thin, translucent ; whorls Z. humitis. 
ue 3 [W. G. B.| 
5-6; aperture equal to the spire, with a cal- Fig. 126. 
careous deposit on the pillar lip; umbilicus 
distinct; color yellowish, or reddish-white. ( 
Ee 6, W327 mull: 
Station, sluggish rivulets. Chester County ; common. 
6% E 
