PALUDINIDiE. 93 



These animals are oviparous, their eggs being de- 

 posited in oblong groups, like the Limncei or Pond 

 Snails, on the stems and leaves of fresh-water plants. 

 (See Pfeiffer, Moll, t. 6. f. 10, 11, 12.) 



5. 1. Bithinia tentaculata. Tentacled Bithinia. (t. 

 8. f. 120.) Shell oval-oblong, yellowish horn- 

 colour, smooth, semitransparent, with five rather 

 flat volutions, and without umbilicus. 

 Helix tentaculata. Linn. Fauna Snec. 531. (List. 



Ang. t. 2. f. 19.) ; Gmel. 3662. ; Mont. 389. 

 Bulimus tentaculatus. Poiret, 61. 

 Lymnea tentaculata. Flem. 

 Nerita jaculator. Mutter, Verm. ii. 185. 

 Turbo nucleus. Da Costa, t. 5. f. 12. 

 Paludina tentaculata. Flem. 



impura. Lam. vi. 175.; List. Conch, t. 



132. f. 32. ; Brard, 183. t. 7. f. 2. ; Turton, Man m 

 134. f. 120. 

 Cyclostoma impurum. Drap. 36. t. 1. f. 19. ; 



Sturm, Fauna, t. vi. 3. 1. 

 Young. 



Turbo lsevis. (?) Walker, f. 33. 

 Nerita sphaerica. Mutter. 

 Var. 1. Shorter, less, and more conical. Drap. 1. 1. 



f.20. 

 In ditches and canals ; common all over Britain. 

 Animal blackish, with golden dots ; foot two-lobed 

 in front, narrow and subacute behind; tentacle seta- 

 ceous, long ; the eyes black. 



Shell half an inch long, and three tenths wide, 

 often covered with a blackish foul coat ; spire com- 

 posed of five volutions, the first very tumid, the others 

 hardly raised ; pillar without umbilicus. 



