383 



Helix Isevi'gata. Walk. Min. Shells, f. 17. 

 Br. Zool. t. S6. f. isy. 

 Helix neritoidea. Chem. Ccnch. x. t. 165. f. 159S. 1599 ? 



H. with a thin, fragile, fub-pellucid, flefh-coloured 

 fhell, with three volutions; the firll extremely large, the 

 others very fmall, very little produced, and placed late- 

 rally: apex comprefled. It is wrinkled tranfverfely, and 

 flightly ftriated longitudinally or fpirally, but always, 

 when alive, covered with a thick, rough, bro\vn epider- 

 mis, which generally rifes into regular, cqui-didant, mem- 

 branaceous, fpiral ridges : aperture fub-orbicular, vaflly 

 large, margin thin ; infide fmooth, light purplifli-brown;. 

 fometimes nearly white : no umbilicus. 



This appears to be rather a fcarce fliell, but Is found 

 fparingly upon fome of our fi:iorcs. We have taken it 

 by dredging at Southampton; and at Torcrofs and Sal- 

 comb in DevonJIiire : have alfo found very fmall fpeci- 

 mens on the fhore at Teignmouih ; and at Falmouth in 

 Cornxoall. The largeil in our cabinet is three-quarters 

 of an inch in length, or rather more, and five-eighths ia 

 breadth; but it is rarely found half an inch long, Mr. 

 Pennant was miftaken in fuppofing it to inhabit 

 frefh-water: it is rather a pelagic fhell, and feldom ta- 

 ken alive but in deep dredging. Do61or Pultexf.v 

 gives it as a Dorfetjliire fliell, and fays it was found on 

 tlie beach at Siudland. We have alfo taken it at that, 

 place, and have received it, very fmall, from Mr. BoY5r 

 at Sandxvich, for the foecies figured by Walker. 



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