381 



This fiiell has Ibmewhat the habit of H. limofa, but 

 not quite fo tumid, and thougli of inferior fize, is always 

 much thicker and ftronger. If, indeed, \t had ever oc- 

 curred, in frefh-water, we< might have been inclined to 

 confider it a variety of that fpecies, but hitherto it has 

 only been found on the fea fhore, and that rarely. 



We have taken it upon the open part of the coafl of 

 South Devon, and believe it has been dredged up in Sal- 

 comb bay, but generally mutilated at the apex, and never 

 alive; from which circumflance doubts may be enter- 

 tained, of its really belonging to that clafs of fliells. All 

 we can fay further on the fubjeft at prefent is, that the 

 fubftance of the {hell is fuperior to any of its affinities, 

 and the number of volutions inferior to thofe, to which 

 it bears the greateft refemblance. If the delicate texture 

 of our frefii-water fliells was capable of bearing the vio- 

 lent agitation of the fea, and the confequent friction, 

 many would undoubtedly be found on our fhores : but 

 this very rarely happens, even in our bays and inlets, 

 and no one inftance has ever occurred to us, on the open 

 or more expofed fliores, except with the Helix vivipara. 



10. 

 Helix liraofa. Lin. Syji.p. 1249. — Gmel. SyJI. p. 5661, Limosa. 



C/iem. Conch, ix. t. 135. f. ]246. 1247. Tab. 16. f. 1. 



Schroder Erdccnch. p. 131. t. 1. f. 3. 

 Turt. Lin. iv. p. 539. 



H. with 



