100 



SYSTEMATIC LIST. 



BIVALVES. 

 FAM. UNIONHLE contd. 



Anodonta cygnea, 34. 

 anatina, 40. 



FAM. DEEISSENID^E. 



Dreissena polymorpha, 40. 



UNIVALVES. 

 Pulmonobranchiata. 



FAM. LIMN^IDJE. 



Planorbis lincatus 

 nitidus, 48. 

 nautileus, 48. 

 albus, 46, 48. 

 glaber 

 spirorlis, 48. 

 vortex, 48, 49. 

 ,, carinatus, 46, 48, 



49. 

 complanatus, 46, 



48. 



corneus, 16, 45. 

 contortus, 48. 

 Pliysa liypnoruin, 50, 51. 

 fontinalis, 50, 51. 

 Limncea glutinosa, 49. 

 involuta, 

 ,, peregra, 13, 49. 

 auricularia, 13, 49. 

 stagnalis, 13, 49. 

 palustris, 13, 49. 

 truncatula 

 glabra, 49. 



fluviatilis, 18, 56. 

 lacustris, 18, 56. 



Ancyli 



