6 4 



TRANSACTIONS OF WAGNER 

 UINTA SELENODONTS 







MEASUREMENTS. 













No. 11,225 









Length of face 





0.057 



Mandible, 



depth at m^ 





O.OIO 



Forehead, width . 





•034 



" 



" " P2 





.012 



Palate, length 





.066 











" width at m-3. 





.017 











Metacarpal ii., length . 





?.o3o 



Metacarpal iv., length . 





.036 



" " breadth, prox. 



end 



.004 



" 



" breadth, prox 



end 





dist. 



" 



.003 



" 



dist. 



" 



.006 



iii., length . 





.0385 



" 



v., length . 





.031 



breath, prox. 



end 



.006 



" 



" breadth, prox 



end 



.0035 



dist. 





.0055 



No. 



1,223 



dist. 





.005 



Tibia, length 





O. 108 



Metatarsa 



ii., length . 





.044 



breadth, proximal end 





.OI I 



, 1 



' ' breadth, prox. 



end 



.0025 



" thickness, 





.021 



" 



dist. 



" 



.004 



breadth, distal end 





.OI2 



" 



iii., length . 





.052 



Fibula, thickness, " 





.008 



■• 



" breadth, prox. 



end 



.006 



Calcaneum, length 





•034 



" 



dist. 



" 



.007 



Astragalus, " 





.017 



" 



iv., length . 





.053 



" breadth, proximal 



end 



.007 



" 



breadth, prox. 



end 



.0045 



*' " distal 



" 



.00S 



■■ 



dist. 



" 



.006 



Cuboid, length 





.009 



■• 



v., length . 





■043 



width 





.005 



,, 



" breadth, prox. 

 dist. 



5nd 



.003 

 .0045 



The Systematic Position of Leptoreodon. 



Wortman 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 Xiphodon did to 

 the European Anoplotheriidce." (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 Poebrothcrhtm is from the former. Leaving aside for the present the 



