THE LINNEAN GENERA. 



Linnean Genera, 



12. Chama, 



13. Area 



14. Ostrea. 



15. Anomia 



16. Mytilus 



17. Pinna.. . 



18, Argonauta 



Lamarckian Genera. Plate. 



Charaa 



Cardita...., 

 Cypricardia 

 Isocardia . . . 

 Tridacna . . , 

 .^IJippopus . . . 



TArca 9 



J Cucullasa 9 



\ Pectunculus 10 



(_^Nucula 9 



Ostrea 11 



Crenatula 11 



Perna il 



Malleus n 



"^ Pedum 11 



Lima ii 



Gryphaea 10 



Pecten lo 



TAnomia 



I PlacuHa. . . . , 

 1 Crania . . . . , 

 ^ Orbicula . . , 

 1 Terebratula 

 (^Hyalaea . . . . , 



11 



11 

 11 

 11 

 11 



pMytilus 



j Saxicava , 



J Anodon , 



\ Modiola 



j Avicula 12 



LMeleagrina 12 



Pinna 



12 



t Argonauta 13 



^Carinaria 13 



b 



xvu 



Figure. 



18 



4 



17 



2 

 3 



3 



16 

 36 

 27 



74 



82 

 80 

 58 

 75 



54 

 1 



1 



3 



30 



1 



2 



24 



28 



9 

 32 

 31 

 42 



4 



1^20 



1—3 

 6 



