£/epAas '/a 



Sfs^odon ^ 



fi£C£m- 



PLEISTOCENE 



UPPER pliocene}] 



LOmRPUOCEL\/E 

 UPPER MIOCENE ] 



Mostoc/on '/q 



MIDDLE M/OCENE \ 



Migration Mo XGomphotJierium 



^rth America [/o„^ chin), 



Tetrabelodor,Y^ LOm MIOCENE) 



Gomphot/terium 



< /onfirosfris iitam 



(^horteninq 



chin) 



UPPER OLIGOCENE 



LOWPROUGOCENE 



7hlaeomastodu\ 

 Pglaeomstodon'/tf UPPER EOCENE \ U^/^/lifninfcAm 



) Moeritherium. 

 MIOOLE EOCENE J i^horicAin) 



L OM^£/i EOCPA/P (oacesTor un*nom). 



Moeri then urn /^ 



Fig. 229. — Evolution of the Proboscidea : on the right, a series of skulls ; on the left, 

 last lower molar. (After Lull, modified by Sinclair.) N.B. ^Telrabelodon should 

 read iGomphotherium. 



(437) 



