THE L1XXEAN GENERA. 



XIX 



Linneati Genera. 



Lamarckian Genera. 



25. Strombus 



27. Trochus 



28. Turbo 



26. Murex -< 



29. Helix ^ 



("Strombus . . 



Pirena 



Cerithium . 



Rostellaria . 

 (^Pteroceras . 



Mures 



Fasciolaria . 



Fusus 



Pyrula ..... 



Struthiolaria 



Ranella 



Triton 



^Ricinula . . . 



[Trochus . . . 



J Pyramidella . 



j Solarium . . . 



LRotella 



("Turbo 



| Pupa 



J Clausilia . . . 



J Scalaria 



J Delphinula . 

 (jTurritella . . . 



f Helix 



Paludina . . . 

 Caracolla . . . 

 Anostoma . 

 Bulimus ... 

 Succinia ... 

 Cyclostoma . 

 Planorbis . . . 

 Lymnaea ... 

 Melania . . . 



Valvata 



Ampullaria . 



Janthina . . . 



Sigaretus ,. . 



b.S 



