Antilocapra 





female 180 



Eatios 



m. 



lto80 



•2000 



1-75 



•0192 



1-88 



•0505 



1-80 



0370 



1-72 



•0250 



1-92 



•0564 



1-83 



•0308 



1-63 



116 M. S. Lull — Neiv Tertiary Ariiodactyls. 



are very minute, such as the precise position of the vari- 

 ous nutritive foramina and the relative proportions as 

 seen in the following table of measurements.- 



Aletomeryx 



1 (young) 2 



m. m. 



Length over all -1140 -1159 



Width, lateral, mid-shaft -0102 0095 



Width, prox. end 0280 0275 



Width, dist, end -0215 0217 



Width, ant.-post,, mid-shaft .. . -0130 -0136 

 Width, ant.-post., prox. end. . . -0307 -0327 

 Width, ant.-post., distal end .. -0189 0192 



Av. 179 



Radius (fig. 16). — The distinctions between this bone 

 and that of Antilocapra are so slight as to be incapable of 

 description, as the figures show. The table of measure- 

 ments follows : 



Aletomeryx Antilocapra 



m. 



Length over all • -1245 



Prox. end, ant.-post. diameter -0114 



Prox. end, transverse diameter -0197 



Mid-shaft, ant.-post. diameter -0080 



Mid-shaft, transverse diameter .... 0134 

 Distal end, ant.-post. diameter .... -0134 

 Distal end, transverse diameter. . . . 0195 



Ulna (fig. 16). — No complete ulna of Aletomeryx is 

 present. Several proximal ends, however, are available 

 for study, one of which articulates perfectly with the 

 radius which has just been described. Of this, about half 

 the total length is preserved and it differs from that of 

 Antilocapra in two respects. The most conspicuous of 

 these is the grooved character of the summit of the ole- 

 cranon, so that, as in the dog, it bears three prominences, 

 of which the posterior one is large and rounded and the 

 anterior ones, which bound the groove, are thin and elon- 

 gated, the outermost being the longest. In the prong- 



female 180 





m. 



Eatio 



•2065 



1-66 



•0225 



1-97 



0370 



1-88 



•0120 



1-50 



•0210 



1-56 



•0244 



1-82 



•0340 



1-74 



Av. 



1-73 



