150 CONTRIBUTIONS 
is a smaller shell and differs in having broader striz and a 
shorter and oblique canal. 
F.nanus. Plate 5. Fig. 155. 
Description. Shell fusiform, transversely striate below 
the middle of the whorl; substance of the shell very 
thin; spire ; whorls , subangular ; canal short, 
obliquely curved; mouth contracted ; outer lip sharp. 
Length 3-20ths, Breadth 1-20th, of an inch. 
Observations. A single fractured individual only of this 
species has come under my view. It differs much from 
any of the above described. It is very minute—has no 
folds, and the strize do not exist on the superior part of the 
whorl. The superior stria being the largest makes the 
A 
whorl subangular there. 
F. Fittonii.* Plate 5. Fig. 156. © 
Description. Shell ovately fusiform, subturbinate, granu- 
late on the superior whorls; substance of the shell rather 
thick; spire somewhat elevated, acute at the apex; whorls 
six, flattened above, subangular; canal short, twisted ; 
mouth ovate ; outer lip sharp. 
Length.... Breadth .4, of an inch. 
Observations. This species strongly resembles the F. 
*T place with great pleasure the name of a distinguished geologist to 
this species. 
