369 



The figure of this common fpecies is given, for d-e 

 purpofe of comparing with it, what is confidered as the 

 H. fragilis of Linn/eus; for which reafon a medium 

 fpecimen vras chofen for the engraving, in order to 

 ada.pt the fize to that of the other. 



Helix fragilis. Lin, Syft. p. \2A9.—GmeL Syfi. p. 365S. Fragilis. 

 Sdiroeter Flvjfconch. p. 309. t. 7. f.8? Xc,b. 16. f. 



H. with a thin, pelhicid, "horn-coloured (hell, much 

 refembling H. Jtognalis, but is more flender, particularly 

 in the fmaller fpires, and the volutions ai-e ufually more 

 diaphanous, and always turn more oblique. 



There is very little doubt tliat this is the H. fragilis of 

 LiXN/EUS, but whether it is really diftinft is difiBcuIt to 

 determine ; all we can fay is, that till very lately no fliell 

 of fuch flender growth had ever occurred to us, am.ongil 

 the flagnalis, in the various parts of the kingdoin we 

 have taken that fliell : and upon a comparifon of all the 

 varieties 6\\\-\e. flagnalis received from our friends, a con- 

 fiderable difference appears, more particularly in the 

 fmaller fhells, which are much more (lender in the fupc- 

 rior volutions. 



The only place in wdiich this has ever occurred to us. 



is the canal intended to make a juntlion of the Kcnneb 



and Avon, between Chippenham and Laycock, in Wdt- 



Jhire : many, that were collefted from that water, were 



B b b ali 



