GEOLOGICAL. SURVEY OF THE TEREITORIES. 579 



The portion of tdnajnst measured belongs to the individual of which 

 so many fragments were found, or Xo. 2. 



The dorsal vertehrie of the same are somewhat distorted by pressure; 

 1 will therefore describe a cervical o^' natural form. The centrum is very 

 short, and the articular face is a wide, transverse oval. Both are slightly 

 concave, and the axis 'being- slightly oblique, the anterior is the more 

 elevated. The surface of the latter is quite rugose, except on the mar- 

 gins. The cervical canal is wide, and the neurapophyses and para- 

 pophyses narrow. Inferior surface regularly convex. 



Measurements of cervical vertebra. 



M. 



Length ceDtrnm 044 



Length basis neurapophysis 040 



Length anterior articular face 102 



Depth anterior articular face 081") 



Width neural canal at base 060 



Belations. — Besides the difference in the development of the anterior 

 nasal tuberosities, whicli might be sexual only, this species differs from 

 L. cornutus in the simple nasomaxillary horn -cores, which want the 

 interior tuberosity of that species, and in the fact that they are com- 

 posed exclusively on their inner sides of the nasal bones to the apex, 

 the maxillaries forming the outer face. U. pressicornis has also a much 

 wider and less massive supraoccipital basin, with lighter horn-cores, 

 if present. Minor differences have been already mentioned. 



The measurements given by Marsh for his Titanotherium (f) anceps 

 (later Tinoceras anceps) are considerably smaller than those of corre- 

 sponding parts of EohasUeus pressicornis, but represent more nearly a 

 species of the size of Uintatlierium robustum. When the species is suffi- 

 ciently described, we shall be able to determine to which of the genera 

 it should properly be referred. 



Restoration. — 3.'he elevation of this anim;il was not much less than 

 that of the Loxolopliodon cornutus., but the proportions were more slender ; 

 as in all the species of Uintatlierium in which the horns are known, 

 these appendages stood in front of the orbits, and nearer thenareal open- 

 ing than in the type of the former genus. The muzzle, too, is materially 

 shorter and more contracted, and the true apex of the muzzle was not. 

 overhung by the great cornices seen in Loxolopliodon. The horn-sheaths 

 were probably simple, while in L. cornutus they were probably palmate. 

 The occipital and parietal crests are much more extended in this species 

 than in the L. cornutus, so that in life the snout and muzzle had not such 

 a preponderance of proportion as in that species. All the species of this 

 genus were rather more rhiuocerotic in the proportions of the head, 

 although the horns and tusks produced a very different physiognomy. 

 The extremities of the nasal bones, though not excavated as in that 

 species, are strongly pitted and exostosed, and this, taken in connection 

 with the elevation of the head, renders it probable that this species also 

 possessed a proboscis. 



History. — This species was originally described by the writer in a short 

 paper, which was published and distributed August 19, 1872, under the 

 generic name Loxolopliodon. I shortly afterward referred it to the new 

 genus Eobasileus, under the name cornutus, under the impression that it 

 was the same as the Loxolopliodon cornutus; but finding this was not the 

 case, I again used the specific name here adopted. 



