566 THE BRIDGER EPOCH. 



like that of Uintatherium mirahUe, Avhicli I only know from Marsh's figure, 

 but is abundantly distinct. It is much more elongate, especially above 

 the (?) posterior part of the crest, and is flattened, and not triangular in 

 section as in that species. 



Measurements of horn-core. 



The total length above crest (5.5 inches) 135 



The total length above anterior base (7J inches) 180 



Width across apex (in front) 095 



Thickness across apex (in front) • 028 



Thickness at base 040 



The supposed remainder of the sj^ecimen (Plates XXXII, XXXIII, 

 Figs. 1-5) includes various parts of the cranium, without teeth; portions 

 of the atlas, femur, and fore and hind feet. 



The fore part of the nasal bone is preserved. The apex is rather 

 acuminate, and its profile forms a descending curve continuous with the 

 superior plane. The tuberosities are mainly lateral, and cause an abrupt 

 expansion of the lateral outlines. Their obtuse external face is longitudi- 

 nally oval, and descends slightly backward. The inferior lateral marginal 

 ridge is contracted, and incloses a concave median space. The tuberosity 

 sinks to the level of the median suture. The posterior part of the nasal 

 rises to the apex of the middle horn-core, forming its inner face. The 

 postero-superior angle of the premaxillary reaches to near the base of the 

 horn, and is not drawn out to a narrow apex as in L. cornutus. The horn 

 is compressed anteroposteriorly at the base; at the apex obliquely inward 

 and forward. The outer face is concave on the lower half, the inner, con- 

 vex. The posterior face is concave and the anterior convex, when viewed 



from the side in profile. 



Measurements of front. 



if. 



Width of both nasal bones at tuberosity 124 



Width of both at base of distal cone 060 



Depth of suture at front of tuberosity 030 



Length of suture, from premaxillary to horn-core 035 



Length of born-core (in front), (6 inches) 150 



Diameter (externally) 080 



Diameter of apex . 048 



The occipital region is furnished with an enormous transverse crest 

 which extends upward and backward. Its margin is gently convex, and its 



