INDKX OF GENERA. 



^4 canthocera* 

 Aconeceras 

 Adolphia . 

 Aelurognathus . 

 Aetonyx . 

 Akidnognathus . 

 Alopccognathus . 

 Anisoccras 

 Anomalina 

 Archaegryllodcs 

 Arctognathus 

 Aristosaurus 

 Atherstonia 



Baculitcs . 

 Bairdia 

 Barroisiceras 

 Bostrychoceras . 

 Bubalus 



Caruichthys 



Cheloniceras 



Chelyrhynchus . 



Cobus 



Connochaetes 



Cristellaria 



Cymatoceras 



Cynosuchus 



Cythere 



Cytherina . 



Cyzicus 



I! 



C 



XI 



