206 



when we shall have received more specimens and are 

 able to observe the animal. 



92. 3. LIMNJEUS stagnalis. Lake Mud Shell. 

 Shell oval, subulate, pointed, brittle ; spire 

 acute ; whorls five ; lower volution much in- 

 flated, and somewhat angular ; the suture deep, 

 (t. 9. f. 104.) 



Limneus stagnalis. Drop. p. 51. t. 2. f. 38, 39.; Alder, Cat. 

 114.; Turton, Man. ed. 1. 121. f. 104. Lymneus stagna- 

 lis. Brard, p. 133. t. 5. f. 1. Lymneus stagnalis. De 

 Montfort, ii. p. 268. Limnea stagnalis. Flem. B. A. 273. ; 

 Sowerby, Gen. f. 1. Lymnaea stagnalis. Lamarck, Syst. 

 91., Hist. vi. ii. p. 159.; Fleming, E. Ency. vii. 77. Stag- 

 nicola vulgaris. Leach, Syn. Moll. 105. ; Hartm. Gaster. 

 t. 8. 12. Helix stagnalis. Linn. S. N. i. 1249.; Mont. 

 p. 367. t. 16. f. 8. PBuccinum stagnate. Mutter, Verm. 

 327. Bulimus stagnalis. Brug. E. M. 303. Lymneus 

 major. Jeffreys, Linn. Trans, xvi. 375. Limnaeus stagna- 

 lis. Eossm. Icon. i. 95. t. 2. f. 49.; Forbes and Hanley, 

 B. M. \v. 274. t. 124. f. 4, 5. Lymneus lacustris. Studer. 

 L. bicolor. Muhlf. L. appressa. Jay, Turbo stagnalis. 

 Da Costa, B. C. 93. t. 5. f. 11. 



Var. 1., thinner, whorls rather more oblique and less ventri- 

 cose (t. 9. f. 105.) : Stagnicola elegans. Leach, Syn. Moll. 

 104.; Schroet. Fluss. Conch, t. 7. f. 6. ? Helix fragilis. 

 Linn. S. N. 1249. ?; Mont. T. B. 369. t. 16. f. 7. Lymnaea 

 fragilis. Flem. E. Ency. vii. 77. Limneus fragilis. Turton, 

 Mm. ed. 1. 121. f. 105. 



Var. 2., thicker, with a purple throat : Buccinum roseo- 

 labiatum. Wolf, in Sturm, Fauna, t. 36, 37. 



In stagnant, and var. 1. slow running, 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- 



