41 
MELANOPSIS carinata. 
TAB. DXXIIL —fig. 1. 
Spec. Char. Ovate, acuminated, with a sharp 
carina wound about the spire. 
Rather more than twice as long as wide, smooth ; the 
last whorl flattened upon the sides, and sometimes 
having an obscure carina near its upper edge besides 
that projection of the edge which higher up the spire 
forms a sharp, spiral keel ; the aperture is elongated, its 
upper part rendered even linear by the large callus upon 
the inner lip. 
Found abundantly in a light greenish clay in a well 
near Newport, Isle of Wight, by Mr. Sowerby, in 1818, 
accompanied by Potamides ventricosus (tab. 341. fig. 1.), 
a new subulate Melanea, and various other fresh-water 
shells. It also occurs in a similar clay, and accompanied 
by the same shells, from Hampstead Cliff* to Cowes, and 
among the fresh-water series on the opposite Cliff’s of 
Hampshire, as we learn by specimens collected by the 
Rev. Professor Sedgwick and Charles Lyell, jun. Esq. 
It is also sparingly found at Headon Hill. 
