52 



Valvata Paludina. 



1003 1 tricarinata Lesueur. 

 V. carinata Sow. 



Am. bor. 



1004 



1005 



1006 2 



1007 4 



Paludina JLam. 



(Bithinia Pride aux.) 

 2 tentaculata L. 



P. impura Lam. 

 (Viviparus Mtf.) 

 4 Listeri Forb. 



N. vivipara Mull. 

 V. lacustris Bk, 1847. 

 vivipara L. 

 N. fasciata Mull.' 

 P. achatina Drp. 

 V. Linnaei Bk. 1847. 

 dissimilis Miill. 



P. carinata Sw. 

 unicolor Olivier 

 Swainsoni n. 



P. unicolor Sw. 

 angularis Miill. Ch. 



var. (3. c. op.) 

 sp. 

 carinata Val. 



P. Burroughiana Lea. 

 decisa Say. 

 subcarinata Say. 

 Bui. carinatus Brug. 



Paludoimis Sws. 



1016 1 chilinoides Reeve. 

 M. ceylanica Fer! 



Dania. 



Germania, 



Ind. or. 



Africa. 

 China. 



Manila. 

 Am. bor. 



Ceylon. 



