296 



University of California Publications. [Geology 



is not appreciably different from that of Antilocapra. The 

 upwardly projecting spine has about the same relative dimen- 

 sions as in Antilocapra. 



The calcaneum is similar to that of Antilocapra. At the pos- 

 terior end of the internal ridge of the trochlea of the astragalus 

 there is a noticeable prominence which extends downward and 

 slightly inward over the sustentacular portion of the calcaneum. 



74 



Fig. 74. llingoceros schizoceras, n. sp.? Posterior metapodial. No. 

 19419, X V12. Thousand Creek Beds, Thousand Creek Nevada. 



Figs. 75a and 75fr. llingoceros scliisoceras, n. sp. Proximal portion of 

 scapula. No. 11892, natural size. Thousand Creek Beds, Thousand Creek, 

 Nevada. Fig. 75a, outer view; fig. 75b, proximal view. 



Fig. 76. llingoceros schizoceras, n. sp.'? Superior side of unciform; 

 a, articulation with lunar. No. 19420, natural size. Thousand Creek Beds, 

 Thousand Creek, Nevada. 



Fig. 77. Antilocapra americana Ord. Superior side of unciform; a, 

 articulation with lunar. No. 8299, Calif. Mus. Vert. Zool.; natural size. 



