TO GEOLOGY. 213 
ever, in being less angular, less ventricose, in being with- 
out the flattened posterior slope, and in having striated 
lateral teeth. 
ACTEON. Montfort. 
A. Wetherilli.* Plate 6. Fig. 224. 
Description. Shell cylindrical, truncate above, smooth ; 
substance of the shell somewhat thick ; spire short and 
truncate ; suture impressed ; columella with one fold ; 
whorls four ; mouth narrow, about four fifths the length 
of the shell ; outer lip simple. 
Length nearly .2, Breadth .1, of an inch. 
Deal, New Jersey. 
The smaller figure is of the size of nature. 
Observations. I have seen no species of this genus with 
whorls so compressed as this. Its short spire, together 
with this character, give it the appearance of a Volvaria. 
It differs from any species with which I am acquainted, in 
having a shorter spire, and a longer mouth. 
* Named after my friend J. Price Wetherill. 
