IX THE LAST HALF- CENTURY. 123 



heretofore unknown ; and demonstrative 

 evidence of the existence of human con- 

 temporaries of the extinct animals of the 

 latest geological epoch has been obtained, 

 physical science has thus been brought 

 into the closest relation with history and 

 with archaeology ; and the striking inves- 

 tigations which, during our time, have 

 put beyond doubt the vast antiquity of 

 Babylonian and Egyptian civilisation, are 

 in perfect harmony with the conclusions 

 of anthroxDology as to the antiquity of 

 the human species. 



Classification is a logical process which 

 consists in putting together those things 

 which are like and keeping asunder those 

 which are unlike ; and a morphological 

 classification, of course, takes notes only 

 of morphological likeness and unlikeness. 

 So long, therefore, as our morphological 

 knowledge was almost wholly confined to 

 anatomy, the characters of groups were 

 solely anatomical ; but as the phenomena 



