XV111 



LAMARCK S DIVISIONS OF 



Linnean Genera. 



19. Nautilus 



20. Conus 



21. Cypraea Cypraea 



"Bulla.. 



Lamarckian Genera. 



Nautilus 



Orthoceras 



Nodosaria 



J Spirula 



^Cristellaria 



Conus 14- 



22. Bulla 



Bulksa .. 



Bulimus 



Achatina 



^ Achati 

 J Physa 

 { Ovula 



23. Voluta •< 



l^Terebellum 



Voluta 



Auricula .. 



Ancilla 



Tornatella 

 Turbineila 

 Cancellaria 

 Columbella 

 Mitra .... 

 Marginella 

 Y r olvaria . . 

 Oliva 



24. Buccinum ■< 



Buccinuni.. . 

 Concholepas 

 Phasianella . 

 Cassidaria . 



Cassis 



Purpura ... 

 Monoceros . 



Harpa 



Dolium 



Eburna 



Terebra...,. 



Plate. 



13 



13 



13 



13 



14 

 -16 



17 



18 



18 



34 



18 



18 



18 



18 



21 



19 



18 



19 



21 



20 



20 



21 



20 



19 



19 



22 



22 



23 



22 



22 



22 



22 



22 



22 



23 



24 



