Genus IV.— Diplodonta, Broicn. 



DiPLODONTA ROTUND ATA, MofU. 



Family X.-CARDITID/C, Gray. 

 Genus Cyamium, Phil. 

 Cyamium minutum, Fabr. 



Family XL— GARDIID/C, ^r^^. 



Genus Cardium, Liim. 

 Cardium aculeatum, Z. 



Cardium aculeatum, v depressa, Mar. 

 Cardium echinatum, Z. 



Cardium echinatum, v expansa, Jejf. 



Cardium echinatum, v ovata,y"^. 

 Cardiuim tuberculatum, Z. 

 Cardium papillosum, FoIL - 



Cardium papillosum, v lactea,/"^ 

 Cardium exiguum, Gjne/. 



Cardium exiguum, v subquadrata, Jef: 

 Cardium fasciatum, Mo7if. 



Cardium fasciatum, v globosa,y^^. 



Cardium fasciatum, v alba, Jeff. 

 Cardium nodosum, Tini. 



Cardium nodosum, v ovata, y^ 



Cardium nodosum, v rosea, Lain. 

 Cardium edule, Z. 



Cardium edule, v rustica, CJieni. 



Cardium edule, v crenulata, La7n. 

 Cardium minimum, Fhil. 

 Cardium Norvegicum, Spengler. 



Cardium Norvegicum, v gibba, y^^ 



Cardium Norvegicum, v rotunda, Jeff. 



Cardium Norvegicum, v pallida, y^^ 



Family XII.— CYPRINJD/C, Geiiiih 



Genus I.— Isocardia, Lam. 

 Isocardia cor, Z. 



