97 
TURBO Tiara. 
TAB. DLI. —fig. 1. 
Spec. Char. Short, conical ; whorls few, flattened 
upon the sides, crowned by large, rather ob- 
liquely elongated elevations ; base convex, 
umbilicated. 
A large handsome shell, whose characters are remark- 
able and easily defined : the elevations around the spire 
are about twenty upon each whorl, the very young shell 
is free from them. 
Produced by the Mountain Limestone near Preston. 
The specimens are borrowed from the collection of 
Mr. Gilbertson. 
TURBO obtusus. 
TAB. DLL— /g. 2. 
Spec. Char. Short, conical, obtuse, transversely 
striated ; sides straight ; base convex ; striae 
numerous. 
A regularly conical shell, with a solid convex base and 
rounded edge. The striae exceed twelve upon each 
whorl ; they are crossed by fine lines of growth. 
Found at Ancliffe, seldom so large as the specimen 
figured. 
