EVIDENCES FROM PALAEONTOLOGY 



77 



North America, Europe and Asia; Stegodon from the PUocene of 

 southern Asia; and Elephas from the Pleistocene of the Americas, 

 Europe, and Asia, as well as the Hving elephants of Asia and Africa. 



Fig. 5. — Evolution of head and molar teeth of mastodons and elephants. 

 A, A', Elephas, Pleistocene; B, Stegodon, Pliocene; C, C, Mastodon, Pleistocene; 

 D, D', TrUophodoH, ^Miocene; E, E' , Palacomaslodon, Ojigocene; F, F' , Moe- 

 ritheriimi, Eocene. (From Lull.) 



