164 
TURBO rudis. 
TAB. LXXI.—Fig. 2. 
Spec. Cuar. Shell suboval, rather obtuse; whorls 
ventricose. 
Syn. Turborudis. Linn. Trans. VIII. p. 159. 
ee a EP 
Wrorts four or five, rather swelled in their upper parts, 
undulating the sides of the cone; the lip generally thick; 
there are often a few longitudinal furrows besides the striz, 
which, with the irregular lines of growth, give the shell a 
rugged appearance. . 
From near Aldborough, by favour of my kind friend the 
Rey. J. Lambert, of Trinity College, Cambridge. 
Whether I am right in considering these shells as the 
same species with the two recent ones I have named them 
from, must be determined by experience. I cannot discover 
any character to distinguish them by; the /toreus has the 
same markings, and the rudis seems to be as destitute of 
colour as the recent shells, a resemblance that is very 
remarkable, and seems to indicate that these fossils, together 
with others that accompany them, are not of very ancient 
date, compared with those that are in more solid rocks, and 
which also lie deeper in the strata. 
