54 THE MAMMALIA. 



opposed to the doctrine of descent, has left us a 

 fuller report only of the Pig family as regards what 

 he had to say in opposition to Rutimeyer. He 

 never published a full account of his valuable com- 

 parative investigations respecting the domestic ox. 

 But Rutimeyer has published a later and admirable- 

 paper on this very subject, his object being to show 

 the connection between the living oxen and all 

 those belonging to the Diluvial and Tertiary periods. 1 

 We shall presently have to quote from Rutimeyer, 

 and may here supplement our remarks on his works 

 by mentioning his treatise on the genus Deer, 2 which 

 is carried out in the same spirit. All of these con- 

 tributions are masterpieces as regards method, for 

 although starting from a limited horizon, they 

 extend over the whole earth, according to space 

 and time, and the claims of a practical speculation 

 are set forward in opposition to a system of phi- 

 losophy, according to which our investigations in 

 natural science would not have advanced beyond 

 the scheme of Plato's Ideas and Aristotle's Ente- 

 lechiae. 



Riitimeyer's investigations are not confined 



1 Eiitimeyer, 'Versuoh einer natiirlichen Geschichte des 

 Eindes ' in the Reports of the Swiss Palceontological Society, 

 xxii. 1877. 



2 Die natilrliche Geschichte der Hirsche I.e. 1880. 



