64 



TRANSACTIONS OF WAGNER 



UINTA SELENODONTS 



MEASUREMENTS. 



7 lie Systematic Position of Leptoreodon. 



Wortnian does not express himself very definitely upon this question. 

 In one place he speaks of " the Oreodonts other than Leptoreodon" ('98, p. 

 96, foot-note) and in another place he says : " Upon the whole, I think it may 

 be safely concluded, from the evidence at hand, that Leptoreodon held the same 

 position with reference to the American Oreodontida; that Xipliodon did to 

 the European Anoplotheriidcs." (P. 97.) 



I have reached a different conclusion. The phylogenetic position of this 

 genus is not so clear and definite as that of Protylopus, because we have as 

 yet found no White River genus which is so obviously descended from 

 it as Poebrotherinvi is from the former. Leaving aside for the present the 



