524 



GENERAL CONSIDERATIONS 



Parelephcis 

 Pleistocene 



Sfegodon 

 Upper Pliocene 



Sfe go mas to don 

 Pliocene 



Te frabelo don 

 Pliocene Sc Miocene 



Palaeo mastodon 

 Oligocene - Upper Eocene 



Mo e ritherlum 

 Loiver Eocene 



Fig. 320. — A series illustrating several types of extinct elephant-like mammals, and 

 showing on the left the skulls and hypothetical outlines of the heads and probosces, and 

 on the right the grinding surfaces of the corresponding last lower molar teeth. While 

 arranged in a series, beginning with the earliest known form, Moeritherium, the types above 

 probably do not represent a single line of descent; Parelephas is an extinct cousin of the 

 modern Elephas and not an ancestor. Moeritherium and Palaeomastodon are found only 

 in the Old World, the others in North America. The magnification is indicated for each 

 figure. (From several sources, in general after Lull.) 



