134 



119. PALUDINA achatina. Shell thin, conic-oval, 

 acute ; volutions six, tumid, with three reddish- 

 brown bands ; the sutures well defined. 



Paludina achatina. Lamarck, vi. ii. p. 174. 

 Cyclostoma achatinum. Drap. p. 36. t. \.f. 18. 



Shell resembling the last, but is of a more oblong 

 shape, with six volutions, which are not so much 

 swollen, and consequently the sutures are not so 

 deep. 



Found with the last. 



120. PALUDINA impura. Shell oval-oblong, yellow- 

 ish horn-colour, smooth, semitransparent, with five 

 flat volutions, and without umbilicus. 



Paludina impura. Lamarck, vi. ii. p. 175. 



Brard, p. 183. t. 7./. 2. 



Cyclostoma impurum. Drap. p. 36. t. l.f. 19. 

 Helix tentaculata. Mont. 389. Turt. Diet. 68. 



b. shorter, less, and more conical, Drap. t. l.f. 20, 



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. 



In ditches and canals. 



