208 LIMN^JAD^E. 



outer individual impregnates another individual, so 

 that the animals form a more or less long chain 

 floating on the surface of the water. 



In the Danube this species grows to four times 

 the size of the usual English variety, but does not 

 otherwise differ from it. 



The teeth of L. stagnalis are figured by Otto 

 Goldfuss, 48. t. 7. f. &c. 



b. Shell subconical or elongate ; whorls gradually en- 

 larging ; mouth generally shorter than the spire. 

 (Stagnicola Leach.) 



93. 4. LIMNEUS palustris. Marsh Mud Shell. 

 Shell conic-oval, with six rather tumid volu- 

 tions, the lower one somewhat angular by 

 raised transverse and longitudinal stria; ; mouth 

 ovate ; throat brown or violet, (t. 9. f. 107.) 



Buccinum palustre. Mutter, Verm. ii. 131. Helix palustris. 

 Gmelin, 3658.; Mont. p. 373. t. 16. f. 10. Helix stagnalis, 

 var. /3. Perm. B. Z. 86. t. 13. f. 136. B. Helix limosa. 

 Linn. S. N. i. 1249. ? Helix fragilis. Pulteney, Dorset. 48. ; 

 Donov. B. S. v. t. 175. f. 1. Helix fontinalis. Donov. B. S. 

 vi. 175. f. 2. and *. Helix Corvus. Gmelin, S. N. 3665. 

 Helix striolata. Oliv. Adriat. Limnea Corvus. Dupny, 

 Cat. L. obscurus; L. limbatus; L. lamnosus. Ziegl. L. 

 fusciis. Pfeiff. Deut. Moll. 92. t. 4. f. 25. L. vogesiaca, 

 and L. disjuncta. Put. Moll. Vog. 58. Limneus palustris. 

 Drop. p. 52. t. 2. f. 4042., and t. 3. f. 1, 2. ; Alder, Cat. 

 114. ; Turton, Man. ed. 1. 123. f. 107. Limnaeus palustris. 

 Rossm. Icon. i. 96. f. 51, 52.; Forbes and Hanley, B. M. iv. 

 180. t. 124. f. 2. Lymneus palustris. Brard, p. 136. t. 5. 

 f. 6, 7. Lymnaea palustris. Fleming, Ency. Edinb. vii. 77. ; 

 Lamarck, vi. ii. p. 160. Stagnicola communis. Leach, Syn. 

 Moll. 103. Limnea palustris. Flem. B. A. 274. Bulimus 

 palustris. Brug. E. Meth. 302. Lymnea fragilis. Kenyan, 

 Mag. N. Hist. ii. 425. f. 182. e. 1829. Limneus communis. 



