LIMN^AD^i. 237 



Ly nine us stagnalis. Brard, p, 133. t. 5. f. 1. 



Lymnus stagnalis. De Montfort, ii. p. 268. 



Limnea stagnalis. Sowerby, Gen. f. 1. 



Lymnaea stagnalis. Lamarck, vi. ii. p. 159. 



Stagnicola vulgaris. Leach, Mollusc, p. 145. 



Helix stagnalis. Linn. S. N. i. 1249.; Mont. 

 p. 367. t. 16. f. 8. 



Bulimus stagnalis. Brug. E. M. n. 13. 



Lynneus major. Jeffreys, Linn. Trans, xvi. 375. 



Limnaeus stagnalis. Rossm. Icon. i. 95. t. 2. f. 49. 



Var. 1. thinner, whorls rather more oblique and 

 less ventricose. 



Stagnicola elegans. Leach ; Schroer, Fluss. 

 Conch, t. 7. f. 6. ? 



Helix fragilis. Mont. T. B. 369. t. 16. f. 7. 



Limneus fragilis. Turton, Maji.ed. 1. 121.f. 105. 



Var. 2. thicker, with a purple throat 



Buccinum roseo-labiatum. Sturm, Fauna, t. 36, 

 37. 



In stagnant and slow waters. 



Animal yellowish, paler beneath. (Sturm, t. 34 

 and 35.) 



Shell an inch and a half long, and nearly an inch 

 wide, thin and brittle, of a greyish white colour, often 

 covered with an extraneous coat; spire composed of 

 six or seven volutions, which are rounded and tumid, 

 tapering to a fine point ; the larger one striate longi- 

 tudinally, and generally crossed by raised transverse 

 lines, giving it an angular appearance like cut glass ; 

 pillar with the fold very strong, forming a slight um- 

 bilicus, the lip white and spread. 



These shells vary greatly in thickness, according 

 to the nature of the water they inhabit. The outer 



