32 



Fig. 



Cerithium 24 



Pleurotoraa 25 



Fusus 26 



TROCHUS. PI. 5. 





Monoilonta. 

 Helicina .. . 

 Monodonta. 



Rotella. 



TROCHUS. PI. 6. 

 Monodonta 



TURBO. PI. 6. 



Cyclostoma 



Paludina . . . 

 Cvclostoma. 



7 

 10 

 18 

 19 

 21 

 22 

 24 

 25 

 26 

 29 

 SO 



35 

 36 

 37 

 46 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



Cyclostoma 1 1 



Pupa 12 



13 



14 



Auricula 15 



Scalaria 16 



17 



18 



— . 19 



20 



Cyclostoma 21 



22 



23 



Bulimus 24 



Phasianella 25 



26 



Paludina 27 



28 



Cyclostoma 31 



32 



Clausilia 35 



36 



37 



38 



39 



40 



Turritella 41 



Cyclostoma 42 



Phasianella 46 



47 



Paludina 48 



HELIX. PI. 7. 



Succinea 9 



Planorbis 12 



