OKEODON. 31 



in tlie Camel and Anoplotherium ; whereas, in the Deer, and other ruminants, it is 

 beneath the anterior part of the orbit. (II. 1, 2.) 



Internal to the position of the malar bone, the face is deeper than in Anoplotlie- 

 rium, but relatively is not as deep as in the Camel. 



The infra-orbitar foramen is placed above the position of the third premolar, and 

 is more advanced than in the Anoplotherium or Camel, but is less so than in the 

 Deer, Ox, Sheep, and other ruminants. The :^ce, from the post-orbital arches to 

 the nose, constitutes very nearly an equilateral triangle, being relatively broader 

 between the post-orbital arches, or at the base of the triangle, than in Anoplothe- 

 rium. The side of the face, in advance of the orbit, is vertically convex, and 

 one of the most remarkable features of the genus exists upon this surface, viz., a 

 large lachrymal depression gradually commencing at the borders of the bones in 

 sutural connection with the lachrymal bone. This depression is rather more 

 elevated in its position than in the Deer, and is hemispherical, as in the extinct 

 genus of pliocene Oxen, the Bootherium. Anterior to the infra-orbitar foramen 

 the face is slightly depressed, and just in advance of this position is a gentle rise, 

 corresponding to the course of the fang of the canine tooth. 



The lateral view of the extremity of the nose resembles more that of the Anoplo- 

 therium than of any existing ruminants, presenting the same slope lateral to the 

 convex termination of its floor, which is constituted by the incisive alveoli. The 

 intermaxillary bone, however, is very much smaller than in this genus, projecting 

 as it does at the lateral margin of the nose only very slightly beyond the end of 

 the maxillary, and at the incisive alveoli a very small distance relatively beyond 

 the anterior line of the canine tooth. (II. 1.) 



Superior View. — (PI. IV. Fig. 1 ; V. 4; VI. 1.) The upper view of the cranium 

 proper, much resembles that of the Camel. The sagittal crest is prominent, and 

 pyramidal, with concave sides ; and it bifurcates immediately at the position of the 

 coronal suture. The forehead generally is convex; and it has very nearly the 

 form of that of the Camel, but it is less prolonged outwardly towards the orbits, and 

 is not so prominent above these, and also is relatively not quite so much depressed 

 at the bifurcation of the sagittal crest. 



The supra-orbitar foramen varies in its exact position in different individuals, but 

 is usually situated a short distance from the frontal suture, and nearer to the fronto- 

 nasal, than to the coronal suture. It is directed forward, and is continuous with a 

 shallow groove passing to the outer side of the fronto-nasal suture. (IV. 1.) 



The muzzle is relatively short, as in Anoplotherium, and superiorly is usually 

 transversely convex, with the sides vertical; but in some specimens it is nearly flat 

 at the nasal bones. 



As far as can be ascertained in any of the specimens, but principally from an im- 

 pression upon a portion of matrix, the anterior extremity of the nose, as constituted 

 by the ends of the ossa nasi, appears to have been like that of the Deer; and the 

 lateral margin and incisive alveoli are convex; and the latter project relatively 

 to their position in Anoplotherium, or recent carnivora, very little beyond the front 

 of the canines. 



Posterior 'View.—{V\. IV. Fig. 2.) The occipital surface resembles a good deal 



