1884.] ^^ [Cope. 



tween the Auchenia weddelU Gerv. and the Eschatius conidens, having just 

 about the dimensions of the Camelus dromedarius or the Palauc7ierda 

 magna Ow. It difiers from the Eschatius conidens in the much longer 

 inferior diastema, longer, coossified symphysis, and smaller true molar 

 teeth ; the comparison being made with superior molars of the E. conidens. 

 The alveolus of the inferior canine tooth is small, and is a short distance 

 posterior to the third incisor, being separated by a short diastema. The 

 mental foramen is very large, three times the size of that of the E. conidens, 

 and its anterior edge is 20 mm. posterior to the canine alveolus. The 

 alveolar parapet of the diastema is not so elevated as in E. conidens, but is 

 distinct. The dentition shows that the animal is an old one. The fourth 

 premolar has two divaricate roots, which spread nearly as far anteropos- 

 teriorly as those of the first true molar. The crown is compressed. Apex 

 broken. The crowns of the molars are worn ; that of the first to the 

 roots. The heel of the third true molar is lost. 



Measurements. M. 



Width of mandible at inferior canines 027 



Length of inferior postcaniue diastema 110 



" " molar series 132 



P-m. iv 027 



M.i 029 



M. ii 034 



Widthof " M. ii 022 



Depth of ramus at middle diastema 043 



P-m. iv 058 



From the Oregon desert ; Professor Condon's collection. 



BOS Linn. 

 Bos LATiFKOXS Harlan. 



This species is represented by numerous remains, and must have been 

 abundant in Mexico during the Pliocene epoch. 



On the structure of the feet in the Extinct Artiodactyla of North America, 

 By E. D. Cope. 



{Read before the American Philosophical Society, August 15, IS84.) 



The structure of the feet of a number of the Artiodactyles of the Ter- 

 tiary beds of North America has already been described. In this paper 

 I enumerate these, and add descriptions of some types which have been 

 hitherto unknown. I commence with the Bunodonta. 



BUNODONTA. 



Pantolestes Cope. 



The structure of the tarsus only of this Eocene genus is known.* 



* Cope, Proceedings American Philosophical Society, 1881, p. 188. Pal. Bul- 

 letin, JSo. 34. 



