fame minute Britifh Shells . i 65 
(hell is ground down or divided in that diredtion. Fig. 6. (hew- 
ing the (hell ground away in part, with its umbilicated fide 
uppermod. Fig. 7. the fame more deeply and evenly ground, 
with the depreffed or more convex fide uppermoft. 
The fecond fhell I (hall take notice of has much of the 
fame external face with the preceding, and is nearly of the 
fame fize and colour, but materially differs from it in having 
an uninterrupted cavity from the mouth to the center; that is, 
no divided chambers or compartments . This therefore evi- 
dently belongs to the genus of Helix . 
It is drongly umbilicated on one fide, and almod plane on 
the other, the central wreaths being nearly of equal height, or 
but (lightly depreffed and deftitute of that narrow border or 
fillet mentioned in the preceding (hell. It con fids mod com- 
monly of three volutions, convex on both fides, with an obtufely 
carinated margin, and femioval mouth. 
It may be named, 
Helix (J'ontana ) teda comp refill obtufe carinata, hinc urn- 
bilicata, anfradtibus tribus utrinque convexis, apertura 
femiovata. 
Fountain Helix. 
The figures here given reprefent this (hell, on both fides, im 
its natural and magnified date, fio that more words to defcribe 
it. are needlefs. 
Fig. 1. (Tab. II ) The (hell of the natural fize, with the 
mod convex fide uppermod. 
2. The fame, with the umbilicated fide uppermod. 
3. The (hell magnified, the mod convex fide uppermod. 
4. The fame magnified, the umbilicated fide uppermod. 
I do not find that it has been noticed by any author. 
It 
