ROAN, SABLE, AND ORYX 323 



most highly speciaKzed seem to be the gazelles, although 

 they really extend far back geologically to the Miocene age. 



Dik-dik 

 Bhynchotraginae 



Klipsprincrers 

 Gazelles, etc. / Oreotraginae 



.Jjitilopinae 



. Duikers 

 Cephalophinae 



JTartebeests, etc. 

 Bubalinae 



Btishbucks, etc. 

 Tragelaphinae 



Waterbucks, etc. 

 Kobinae 



Buffaloes and Oxen 

 Bovinae 



Diagram of the family BovidcB showing relationships of the 

 subfamilies 



There are no really remote ancestral types known, the oldest 

 fossil species being quite as distinctly antelope as the living 

 species; so that as yet the paleontological records afford 

 us little clew to the evolution of the group. 



