81 



Family Ostreidee — 

 Ostrea 



Class PALLIOBEAyCHIAXA 



Family TerebratMlid^e — 

 Terebratula 

 Waldlieimia 

 Terebratulina 

 Magasella 

 Megrerlia 



11 



Family Terebratulidse — 



Kraussina 

 Family Rhynchonellidge — 



Atretia 

 Family Craniidae — 



Crania 

 Family Discinidge — 



Orbiciila 

 Family Lingulidge — 



Lingula 



