GEOLOGICAL SURVEY OF THE TERRII OKIES. 589 



M. 



Length centrum axis to odontoid 057 



Width neural canal do 030 



Sfore and aft 040 

 vertical, (total) 043 

 transverse 059 



Diameter neural arch of same J i^^i^rse:::""::"::::""::::::":::"::: :o:S 



( anterior-posterior 041 



Diameter centrum of lnmbar< vertical, (total) 050 



( transverse 063 



Diameter head of femur 060 



Length astragalus fore and aft 050 



Width astragalus 065 



Length navicular facet 049 



Width navicular facet 020 



Width cuboid facet 018 



Length cuboid facet 016 



Width (fore and aft) anterior calcaneal , 018 



Length ]>osterior calcaneal facet OQ'2 



Length fibular, (axial) 041 



Length terminal phalange 012 



Width do. proximally 015 



Width distally " 030 



vertical 051 



transverse 080 



Diameter glijnoid cavity scapula < 



From the beds of the Green Eiver epoch uear Evanstou, Utah, (uow 

 Wyoming.) 



METALOPHODON, Cope. 



Proceedings American Philosophical Society, 1872, jy. 542. (Published September 20.) 



In distinguishing this genus from Bathmodon, I stated that the differ- 

 ences were in the dentition so far as known; i. e., that the crests of the 

 true molars are not united internally and that the premolars are two (not 

 three) crested. I would now add to the characters, that there are 

 three molars on each side, with transverse crests, which do not unite at 

 the apex, except in the case of the anterior, when they are slightly con- 

 nected. In Bathmodon there is but one such tooth, the posterior. The 

 inner or third crest of the posterior premolar of that genus is only a cin- 

 gulum, and is not probably a generic character. 



Metalophodon aematus, Cope. Loc. cit. 



This species is represented by the greater part of the dental series of 

 both jaws, which I took from a decayed cranium myself, and can thus 

 be assured of their mutual relations. One of the trite molars, at least, 

 belonged to the milk series, as indicated by the unworn crowns of the 

 successional teeth accompanying. Some of the premolars are but little 

 worn. 



The incisors are well developed, those of the premaxillary subequal in 

 size. The crown has a convex cutting edge and flat inner face. The 

 outer face is convex. In some the inner face is more concave, and is 

 bounded by a cingulum next the root. 



The premolars present a siugle external crescent of acuminate outline, 

 and a smaller, more transverse one, within. A cingulum bounds the 

 crown fore and aft, but is wanting at both base and apex of the triangu- 

 lar base. In the more posterior the crescent is more open, and the 

 crown less transverse. 



The molars present an increase in transverse extent of the external 

 crescent, and the interior one is wanting. In the posterior two the an- 



