126 THE MAMMALIA. 



have furnished one huge Edentate, Ancylotherium. 

 Finally a few remains from the Upper Eocene of 

 Quercy corroborate what is demanded by our theory 

 and common sense. With this division of the 

 living world, we may be said, upon the whole, 

 to stand utterly helpless as regards geological 

 antiquity, in so far as the question refers to a 

 special proof for the origin of species, and the 

 perfectly justifiable proof of a general deduction is 

 not accepted. 



4. THE TJNGULATA, OE HOOFED ANIMALS. 



The usual classification of the living mammals 

 furnished with hoofs into many-hoofed, double- 

 hoofed, and single-hoofed animals appears as 

 natural and self-evident as convenient. However, 

 it becomes utterly inapplicable and proves alto- 

 gether incorrect when tested by our present 

 scientific principles, and when we further consider 

 the palaeontological material that has gradually 

 been acquired. Of no other group have such 

 numerous fossil remains been found, and in no 

 other have so many lines been evolved from the 

 earliest Tertiary periods, partly up to the present ; 

 hence the remark of a recent writer, that 'the 

 genus Horse is the true " show horse " of the theory 



