34 



THE QUARTERLY REVIEW OF BIOLOGY 



TABLE i — Continued 



Delphinidae— Cont: 



Protopbocaena. . . . 



Pseudorca 



Rbabdosteus 



Steno 



Stereodel-phis 



Tretospbys . . . ... . 



Tursiops 



Ziphiodelphis 



Delpbinapterus. . . 



Monodon 



Lonchodelphis . . . . 



Pontistes 



Pontivaga 



Stenodelphis 



Platanistidae: 



Zarbachis 



Kogiidae : 



Kogia 



Physeteridae: 



Aulophyseter 



Balaenodon 



Diaphorocetus 



Dinofiphius 



[?] Graphiodon. . . 



Hoplocetus 



Idiopbyseter 



Idiorophus 



Ontocetus 



Orycterocetus 



Phystter 



Pbyseterula 



Pbysetodon 



Placozipbius 



Priscopbyseter 



Prephyseter 



Scaldicetus 



Scaptodon 



Thalassocetus 



Incertae sedis : 



Agriocetus 



Arcbaeodelpbis . . . 



Patriocctus 



?E 

 Au 



N 

 N 



N 

 E 



E-J 



E 

 Au 



?Au 



N 

 N 



