208 LIMN^AD^. 



outer iudiviclual 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 Z. stagnalis are figured by Otto 

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



b. Shell suhconical or elongate ; zvJwrls gradually en- 

 larging ; mouth generally shorter than the spire. 

 (Stagnicola Leach.^ 



93. 4. LiMN^us palustris. Marsh Mud Shell. — 

 Shell conic-oval, with six rather tumid volu- 

 tions, the lower one somewhat angular by 

 raised transverse and longitudinal striae ; mouth 

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



Buccinum palustre. Miiller, Verm. ii. 131. — Helix palustris. 

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

 var. /3. Penn. B. Z. 86. t. 13. f. 136. b. —Helix limosa, 

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

 Donov. B. S. V. t. 175. f. 1. — Helix fbntinalis. Donov. B. S. 

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

 — Helix striolata. Oliv. Adriat. — Liranea Corvus. Dupuy, 

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

 fuscus. Pfciff. Dent. Moll. 92. t. 4. f. 25. — L. vogesiaca, 

 and L. disjuneta. Put. Moll. Vog. 58. — Limneus palustris. 

 Drop. p. 52. t. 2. f. 40—42., and t. 3. f. 1, 2. ; Alder, Cat. 

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

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

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

 f. 6, 7. — Lymnaea palustris. Fleining, Ency. Edinh. vii. 77. ; 

 Lamarch, 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, 

 Masc. N. Hint. ii. 425. f. 182. e. 1829. — Limneus communis. 



