624 Troxell — Vertebrate Fossils of Rock Creek, Texas. 



With the fragment of maxillary and its teeth and the scapula 

 just mentioned, there were other parts such as a cervical 

 vertebra, the proximal end of a cannon-bone (fig. 12) and a 



Fig. 9. 



Fig. 10. 



Fig. 9. Auchenia hesterna. glenoid aspect of scapula. One-third nat. 

 size. 



Fig. 10. Eschatius conidens, glenoid aspect of scapula. One-third nat. 

 size. 



small phalanx (fig. 13), which seemed further to indicate a 

 rather slender agile animal with the browsing adaptation. 



The small phalanx is specifically distinct from the larger 

 phalanges. It may belong to Eschatius conidens, since its 

 ratio is but 6 per cent lower than that of the Eschatius teeth. 



Fig. 11. 



Fig. 12. 



Fig. 11. 

 Fig. 12. 



Auchenia hesterna, head of cannon-bone. 

 Eschatius coyiidens, head of cannon-bone. 



One-third nat. size. 

 One-third nat. size. 



Measurements and Ratios of Phalanx No. 200. 



Recent 

 No. 1551 



Phalanx (considered as hind) Hind Ratio 



Length over all....- -._ 9*0 108 



Prox. width transverse 3*8 66 



Prox. thickness ant. -post 3*2 88 



Distal width 3*5 60 



Distal thickness 2'6 77 



Shaft, least trans, diam 2*1 67 



Shaft, least ant.-post. diam 1*6 88 



Speed index... 4*29 



79 



Fossil 

 No. 200 



9-7 

 2-5 

 2'8 

 2-1 

 2*0 

 1-4 

 1-4 

 6-96 



