Ponds.— Shells. 35 
the foliage of an antediluvian Palm tree. The figure of a portion of 
one is given at Fig. 9. Some of these plumose fragments can be 
traced for more than a foot between the layers of shale. 
Fig. 9 
y > Al Lita 
Fig. 10. 
/ p A . . = s 
Le Se "3 ( } A Me Natural size. 
Ponds.—Shells.—After uh iy Trumbull, we enter Portage 
County. In this county we found a number of beautiful ponds, 
from each one of which flows a perennial stream. © One, which lies 
a few miles south of our route, in Stark County, called ‘“‘ Congress 
Lake,” was, until recently, the only known locality of the fine univalve 
shell, Lymnea stagnalis. It was discovered by Dr. K. in the 
course of the last season. I have one in my possession, which is 
two inches in length, with the body whorl three fourths of an inch in 
' diameter. ‘As this rare and elegant shell has not been figured or de- 
scribed by any American conchologist, a drawing is given at Fig. 10. 
The description is copied from Dillwyn, and appears to be so simi- 
lar to that of our own shell, that there can be no doubt of its identity 
with the European species, although it is a rare fact, and which 
searcely again occurs in all our long list of land and fresh water 
shells. Geoffroy calls it ** Le grand Buccin.” 
Lymnaa stagnalis, (Lamarck.)—Specific Character.—“ Shell 
imperfect, oblong, ventricose, pellucid, with the spire produced and 
subulate ; aperture ovate.’ 
— Shell often two inches long, and about half as 
hou thin, feritile and pellucid, of a whitish, dusky, or grayish color; 
