150 CONTRIBUTIONS 



is a smaller shell and differs in having broader striae 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 l-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 striae do not exist on the superior part of the 

 whorl. The superior stria being the largest makes the 

 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. 



* I place with great pleasure the name of a distinguished geologist to 

 this species. 



