113 
EUOMPHALUS. 
TAB. LIL 
I have placed the following under this new Genus* 
as rather agreeing with it than with Delphinula* 
where the penetrating Mr. Parkinson has doubted 
the propriety of placing them. 
EUOMPHALUS discors, 
TAB. LIL —Fig. 1. 
Spec. Char. Above subimbricated with four spiral 
projections* beneath nearly smooth, 
KuAther conical, with three or four volutions, the im- 
brications are most prominent over the spiral projections, 
one of which forms the margin of the whorl ; the diameter is 
about two inches, the length little more than three quarters s 
aperture nearly circular. 
The specimen was presented to me by Richard Duppa, 
Esq. in 1810 , it is a beautiful one from Colebrook Dale, 
The lower figure shows the under side, which differs so 
much from the upper as to constitute a peculiar character, 
I have therefore called it discors. 
EUOMPHALUS rugosus. 
TAB. LIL —Fig. 2 S 
Spec. Char. Above subimbricated* with four 
spiral projections; beneath plaited* margin 
rather acute. 
The general shape of this shell is much like the last; the 
form of the mouth, which has two sharpish angles, and the 
undulating plaits beneath, distinguish it well. In this 
species one of the spiral projections forms the margin, and 
the other the inner edge of the whorl. 
I am favoured with this from Colebrook Dale by 
Mr. Ryan, 
