3/4 



H. with a thin, fub-pellucid, yellowifh, horn-coloured 

 (hell, with four fpires; the firft very large and tumid, 

 the others very fmall : a,pex fine, and pointed : volutions 

 wrinkled longitudinally : aperture extremely laige, oval, 

 three fourths the length of the (hell; outer lip thin; pil- 

 lar lip thickened; infide white, or yellowifh : outhde 

 ufually covered with a thick, blackifli, or dulky-^brown 

 epidermis. Length one inch; breadth five-eighths, ufu- 

 ally much lefs. 



This fpecies, the mofl; common of all our frefh-water 

 (hells, is frequently confounded with Helix auriculatia, 

 which is a mucli more local (liell ; whereas this is found 

 in mofl: of our flow rivers, and ftagnant waters. 



Mr. Pennant has given a good figure of it, and has 

 quoted the H. putris of Linnaeus. We do not however 

 think it is that fliell. Da Costa has quoted Pennant's 

 figure, for his trianfraBus, which is probably the H. 

 putris of Linn ^ us. 



The animal is perfc6ily an aquatic fpecies, and is ne- 

 ver found to expofe itfelf on the plants out of water. It 

 is of a ycllowifii colour, with two broad, flat tentacula, a 

 little tapering : eyes at the bafe of the tentacula^ beneath. 



ScHROETER has evidently confounded this fliell with 

 H. auricularia, and has made other fpecies out of 

 varieties. 



Helix 



