Recent 

 Pleistocene 

 Upper Pliocene 



ELETPHAS 

 (short chin) 



Lower Pliocene TETRABELODON 



[longirostris stage] 

 upper Miocene (shorteningchin) 



Middle Miocene TETRABELODON 



fANCUSTIDENS STAGE] 



Lower Miocene (long chin j 



Upper Oligocene ^'9rahon from Africa 

 ' ' "^ into Europe -Asia 



bMer Oligocene' 

 UpfierEocene 

 Middle Eocene 

 Lower Eocene 



PALAE0MA5T0D0N 

 (^lengthening chin) 



NOERITHERIUM 

 (short chin) 



Ancestry of Elephants. Progressive stages of development. 

 — From "A Guide to the Elephants (recent and fossil) in the British 

 Museum (Natural History Division)," Dr. A. Smith Woodward. 



