77 
ACTEON cuspidatus. 
TAB. CCCCLV. — fig. 1. 
Spec. Char. Subcylindrical, smooth; spire 
immersed, cuspidated ; one plait upon the 
columella. 
This shell is nearly cylindrical, but it is a little con- 
tracted towards the base ; the upper end is truncated 
with a small portion of the acute spire in its centre ; the 
aperture extends the whole length of the shell, except 
this small part of the spire ; the colummella has a shaip 
spiral edge, and one distinct plait above it. The aper- 
ture spreads a little, but is not notched at the base. 
So novel is the contour of this little shell, that it is 
with difficulty compared to any before known ; it 
agrees, however, with the essential characters of Acteon, 
but differs in general form, and in having a plain surface ; 
it comes nearer in shape to Yolvaria, but that has a trun- 
cated or notched base, and crenated lip to the aperture, 
besides several plaits upon the columella. It has been 
proposed to form a new Genus of it, to be called Cylin- 
drites, but the following species having a conical spire, 
connects it with Acteon Nose, (tab. 374.) 
Figured from the Rev. George Cookson’s Collection 
of Fossils found at Ancliffe. Fig. 1. A. is magnified. 
