196 
VERMETUS polygonalis. 
TAB. DXCYI. —Jig. 6. 
Spec. Char. Spiral portion a short cone,, with one 
involute ridge running up to the apex, and 
two ridges round the margin ; produced part 
trumpet- formed, with seven acute angles. 
The ridge around the spire is erect and very prominent; 
the other ridges are less elevated, except near the ex- 
panded mouth, where they are equally prominent, and 
produced into short spines. 
One of the specimens figured is from the Limestone, 
and the other from the Sand beneath it, both belonging to 
the Lower Greensand : they were found above Seabrooke, 
between Sandgate and Hythe, and are in the collection 
of Lord Greenock, who has liberally allowed them to 
travel to London. 
