129 



with an elongate pointed spire : aperture oval- 

 lanceolate. 



Physa Hypnorum. Drap. p. 55. t. 3.f. 12, 13. 



Limnea turrita. Sorverby, Gen.f. 10. 



Bulla Hypnorum. Mont. p. 228. 



Nauta Hypnorum. Leach, Mollusc, p. 152. 



Shell half an inch long, and a third part as broad, 

 dark horn-colour, glossy and transparent : spire 

 composed of five or six produced and hardly 

 raised volutions, ending rather acutely : aperture 

 narrow-oval, covering about half the shell ; the 

 pillar a little sinuate, often of a pale rose-colour. 



In ponds and slow streams. 



