OF EVOLUTION. 57 



being the true progenitor of the tapir and tapir- 

 oid animals. This is the Palaeotherium, several 

 species of which, ranging in size between the 



Palseotherium. Ancestral form of the European horse (Lower Tertiary 

 of the Paris Basin). 



deer and horse, have been described, and whose 

 remains from the early Tertiary strata of the 

 Paris Basin furnished the material for one of 



