Nov. 1847.] 



325 



mal having very similar characters, but I should think its general structure 

 would entirely preclude the idea of its having been able to catch liviDg 

 animal prey, and doubt very much whether its food could have been other 

 than vegetable. The anterior trenchant molars were more probably in- 

 tended for cutting branches and twigs of bushes, or tough grasses, which 

 afterward underwent a finer trituration with the true molars. 



The position which the genus should occupy. Poebrotherium in its denti- 

 tion approaches the Ruminantia to the Pachydermata, for in the number of the 

 molar teeth and the trenchant nature of the anterior premolars it is closely 

 allied to the Xiphodent Anoplotherium, while in the true molars it is charac- 

 teristically Ruminant, and its position would, therefore, probably stand thus : 

 Dorcatherium, Poebrotherium, Anoplotherium. 



Measurements* of the head. 



In. 

 Meatus auditorius externus to infra orbitar foramen ... 3.1 



From point of hook-like process of inferior maxilla to anterior mental 



foramen 4.35 



Greatest width of orbit 1.15 



Narrowest part of face, below ossa nasi ..... .2 



Width at the corono-condyloid depressions of inferior maxilla . 1.6 



Width at the coronoid processes 2. 



Greatest width at the ossa tympani 2.1 



Distance between ossa tympani .375 



Width of os tympanum . .85 



Length of row formed by the posterior six superior molars . 2.5 



Notch between the first and second superior premolars . . .333 



Length of row formed by the posterior six inferior molars . . 7. 



Notch between the first and second inferior premolar . . .45 



Measurements of superior molar teeth. 



Length. 

 .375 



.4 



.333 



.2 



.15 



.1 



.15 



Breadth. 

 .6 



.55 



.45 



.375 



.4 



.35 



.3 



Thickness. 

 .2 



.25 



.275 



.25 



.1 



.1 



.075 



Measurements of inferior molar teeth. 



Length. Breadth. 



7th molar . . .3 .35 



6th 

 5th 

 4th 

 3rd 



2nd 



.3 



.25 



.15 



.1 



.1 



.5 



.4 



.45 



.35 



.35 



* The measurements are taken in English inches and parts of do. 



