THE LINNEAN GENERA. 



XIX 



Linnean Genera. 



Lamarckian Genera, 



I 



i 



37. Trochus 



28. Turbo 



26. Murex .< 



rStrombus , . 



Pirena . . . . . 

 25. Strombus ^ Cerithium . 



Rostellaria . 

 [^Pteroceras . 



Murex 



Fasciolaria . 



Fusus 



Pj^rula 



Struthiolaria 



Ranella 



Triton 



^Ricinula . , . 

 pTrochus . . . 

 f Pyramidella. 

 \ Solarium . . . 



LRotella 



pTurbo 



I Pupa 



/ Clausilia .. . 



\ Scalaria 



1 Delphinula . 

 ^Turritella . . . 

 fHelix 



Paludina ... 



Caracolla . . . 



Anostoma . 



Bulimus ... 



Succinia . . . 



Cyclostoma . 



Planorbis . . . 



Lymnaea . . . 



Melania ... 



Valvata 



AmpuUaria . 



Janthina ... 



Sigaretus . . . 

 b2 



29. Helix < 



