TO GEOLOGY. L773 
V. parva. Plate 6. Fig. 181. 
Description. Shell subfusiform, transversely striate be- 
low, longitudinally and rather widely ribbed, with small 
spines on the angle of the whorls; substance of the shell 
thin ; spire rather elevated ; suture irregularly impressed ; 
whorls six, angular and subcanaliculate above; mouth 
narrow, straight ; columella somewhat oblique, with three 
folds ; outer lip sharp. 
Length 5-20ths, Breadth 3-20ths, of an inch. 
Observations. This is a smaller species than the last, 
and may be distinguished by its more tapering spire, its 
wider ribs and spines, which are, however, small. A 
single specimen only of this and the last described species 
having come into my possession, it may be found, in others, 
that the characters mentioned above are not entirely per- 
manent. 
V. Vanuremi.* Plate 6. Fig. 182. 
Description. Shell turbinate, transversely striate on the 
base, with rather large spines above ; substance of the 
shell thick ; spire short ; suture small ; whorls five, angu- 
lar above ; mouth somewhat narrow ; columella with two 
folds ; outer lip sharp. 
Length 1.2, Breadth .7, ofan inch. 
* T have placed on this species the name of my friend, Professor Van- 
uxem, one of our most distinguished geologists. 
