GEOLOGICAL SURVEY OF THE TERRITORIES. 0<0 



ber 21, 1872, under the name of Tinoceras grandis, wliicli thus becomes 

 a s.ynouyui of Loxolophodon cornntus. As the name Tinoceras had never 

 been described prior to tbat date, althouftii applied to tbe Titanothe- 

 riiwi {?) aneeps, Marsh, previously without descri[)tion, this name becomes 

 a synonym of Loxolophodon or Eohasileus^ should the two latter ulti- 

 mately prove to be identical. 



Locality. — The remains of the Loxolophodon conmfns were found by 

 the writer in Auj^ust, 1872, in a ravine of the bad lands of Wyoming. 

 The greater part of the cranium, femur, «&c., were excavated from the 

 base of a cliff of perhaps 250 feet in height, on the side of a ravine ele- 

 vated about 1,000 feet, in the Mammoth Buttes, on South Bitter Creek. 

 As the basin of Bitter Creek is 7,500 feet above the sea, the fossil was 

 taken from an elevation of 8,500 feet. The horizon is the Bridger 

 Group of the Eocene of Hayden. 



EOBASILEUS, Cope. 



Proceedings of tbe American Pbilo80i)liical Society, 1872 p. 485, (separata, August 20.) 



As pointed out above, this genus resembles Loxolophodon in the 

 cervical vertebrae, but agrees with Uinfniherium in the rudimental con- 

 dition of the nasal liorn-cores, whi(,'h are mere tubercles. Tbe poste- 

 rior or third pair of horn-cores are also very different, and probably 

 stand on the largely developed lateral crests of the superior surface of 

 the cranium, as in Uintathcrium. They are apparently preserved in E. 

 furcatum, (which is not the ty]>e of tbe genus,) and are compressed from 

 base to summit; in Loxolophodon the base is nearly cylindric. 



The characters of tbis genus bad not been indicated in any of the 

 descriptions published by paleontologists prior to its establishment as 

 above cited. 



The cervical vertehne in E. pressicornis are very short. The limbs are 

 much as in Loxolophodon, as are the scapula and pelvis. The si/m2)hpsis 

 pubis of L. pressicornis, or an ally, is short, and was separated from the 

 ischiadic symphysis; but w^hether tbis belongs to the genus is not 

 entirely certain. 



Tbe unciform bone, of perhaps the same species as the above, displays, 

 as in living proboscidians, three inferior facets. The external facet is 

 deeply concave, and unites with the superior face by au acute angle. It 

 supported the small outer toe by its metatarsus directly. The other two 

 are more nearly on one plane, and are deeper than wide. The unciform 

 is in form a little less than a quarter of a circle, and tbe external (anterior) 

 deptb is one half its transverse length. Its superior surface is slightly 

 convex. 



EOBASILEUS PRESSICORNIS, Cope. 



Loxolojyhodon pressicornis, Cope. Proceed. Amer. Philos. Soc, 1872, p. 580, (published 

 Auftust 19.) Loc. ci(-., p. 4H8, (August 22.) Eohadleus cornnius, Cope, 1. c, p. 485, 

 CAugust 20,) not Loxolophodon cormiius, Cope, 1. c., August 19. 



Eepresented by numerous portions of the cranium, with fragments of 

 ]imbs of one individual; of almost all portions of the skeleton, except 

 the cranium, of a second. A humerus, with astragalus of a third, is of 

 uncertain reference, while a single humerus of another s))ecimen may 

 belong here. Fragments of several other individuals of appropriate 

 size may pertain to it. 



The cranium is represented by nasal, maxillary, malar, occipital bones, . 

 &c. The hrst named has a half-conic apex, and an oblique compressed 



