16 GEOGRAPHICAL DISTRIBUTION. 



can continent to the early Miocene period, whereas such types are 

 almost wholly w r anting in the range of equivalent deposits of the 

 Old World. Yet, if this is the true history of the family, it is 

 certainly a surprising fact that the true camel itself (Camelus), 

 which is entirely unknown on the American continent, should al- 

 ready be found fossil in the Miocene (or older Pliocene) deposits 

 of India. Nor is it at all unlikely that ancestral forms leading up 

 to this type may yet be found in deposits of still older age hereafter 

 to be discovered. 



