46 



ELEPHANTS. 



exclusively terrestrial and gave rise to the elephants as described 

 above. 



\ 

 TABLE SHOWING THE RIDGE-FORMULA OP THE TRUE MOLARS IN THE 



APPROXIMATE LINE OF DESCENT OF THE ELEPHANTS FROM 



Moerith eriuti i. 



Moeritherium 

 Palaeomastodon 

 Tetrabelodon a 

 k 



Mastodon cautleyi 



latidens 



Elephas (Stegodoi 



31 JJ 



)) 



Elephas planifrons 

 7 , hysudricus 

 , 9 indicus 

 primiyt 



A series of specimens illustrating the gradual increase in the 

 number of ridges on the molars is shown in table-case 24. 



Printed by TAYLOR and FRANCIS, Bed Lion Court, Fleet Street. 



