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. 



