37 

 ANCILLA snbulata. 

 TAB. CCCXXXIII. 



Spec, Char. Subulate, smooth, aud shiuing- ; 

 spire and base polished ; spire elongated, 

 acute; the varix at the base of the columella 

 striated. 



Syn. Ancilla subulata. Lam. env. de Paris. 24. 



An elongated, ovate, pointed shell, whose spire and 

 base are wrapped (as in others of the Genus) in a shining- 

 case constructed hke, and partly proceeding from the 

 inner lip, the space between 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 louger 

 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 Aucillahcic described ; it also occurs in perhaps 



