390 



{hells that poffefTes a teftaceous operculum^ except the 

 Nerita Jluvtatiiis. 



Ih&fphcerica of Muller is certainly no other than a 

 young, and more venlricofe variety of this fliell ; fuch 

 are not uncommon, perfeftly white. Walker has fal- 

 len into the fame millake, his figure 33, being no other 

 than the young of the H. tcntaculafa ; of which we are 

 confident, having received his fheU from Mr. Boys. 



Animal pale, with two very long, {lender, fetaceous 

 tentacula, which are continually in motion; at the bafe 

 of thefe, are fituated the eyes, which are protuberant. 



15. 

 LuBRiCA. Helix lubrica. G??!^/ .Sjn^ p. S661. 142. 



Ttirt. Lin. iv. p. 539. 



Lift. AngLt.2.f.7. 



Peti-v. Gaz.t. 30. f. 7, 



C/icm. Conch, ix. t. 135. f. 1235. 



Morion Northamp- p. 415 ? 



MuUcr Verm. ii. p. 104. No. 303. 



Schroeter Krdconch. p. 141. t. 1. f. 9. 

 Helix Stagnorum. Ftdt. Cat. Dorfet. p. 49. 

 Turbo glaber. Da Cofta. p. S7. t. 5. f. 18, 



H. with a fmooth, glofTy, pellucid, horn-coloured 

 {liell, with fix fpires very little rounded, and not much 

 raifed, but well defined by the feparating line: apex ra- 

 ther obtule : aperture oval ; outer lip rather thick, but 



not 



