37 
ANCILLA sub ul ala. 
TAB. CCCXXXIII. 
Spec. Char. Subulate, smooth, and shining' ; 
spire and base polished ; spire elongated, 
acute ; the varix at the base of the columella 
striated. 
Syn. Anciila subulata. Lam. env. de Paris . 24. 
A n elongated, ovate, pointed shell, whose spire and 
base are wrapped (as in others of the Genus) in a shining 
case constructed like, and partly proceeding from the 
inner lip, the space betw een is faintly striated, the aper- 
ture is not remarkably open, the notch at its base is 
rather deep. 
So nearly do A. buccinoides and subulata resemble 
each other, that it is sometimes difficult to decide to 
which species a certain individual may belong ; in the 
specimens before us the spire is shorter than in most of 
the Grignon specimens of A. subulata, but it is longer 
and the last whorl is less ventricose than in the bucci- 
noides, now as some of them appear to be shortened by 
wear, it seems right to refer them to the subulata. 
In certain beds of the stratum of clay filled with fossil 
shells, commonly called the upper Marine stratum, in the 
Isle of Wight, are many shells by some supposed to have 
been inhabitants of fresh water, while in others are 
Oysters, Volutes, and numerous marine shells, amongst 
them is the Anciila here described 3 it also occursinpei haps 
