146 CONTRIBUTIONS 
the middle ; canal rather long and flexed; outer lip sub- 
crenate, within sulcate. 
Length .6, Breadth .3, of an inch. 
Observations. This is a beautiful little species, rough- 
ened nearly all over by decussate striz. On the large 
transverse strie there is a series of small nodules at the 
point of section. 
F. bicarinatus. Plate 5. Fig. 147. 
Description. Shell subturbinate, minutely and _ trans- 
versely striate, longitudinally and minutely folded above ; 
substance of the shell rather thick ; suture linear; whorls 
, rather inflated, bicarinate in the middle; canal 
rather long and straight ; outer lip striate within. 
Length .5, Breadth .2, of an inch. 
Observations. The lower part of a single individual of 
this species only has come under my notice. It is distinct 
from any other herein described. Its minute folds may 
be seen round the largest part of the whorls. 
F. venustus. Plate 5. Fig. 148. 
Description. Shell fusiform, furnished with large lon- 
gitudinal folds cut by small transverse striz ; substance of 
the shell rather thin; spire elevated and acute at the 
apex ; whorls six, convex; canal rather short; mouth 
narrow, one half the length of the shell ; outer lip sharp. 
Length .4, Breadth 3-20ths, of an inch. 
