DINOCERATA. 585 



not used for rooting in the earth is evident from the elevation of the head, 

 Avhich would render this impossible. 



This huge animal must have been of defective vision, for the orbits 

 have no distinctive outline, and the eyes were so overhung by the horns 

 and cranial walls as to have been able to see but little upward. The muz- 

 zle and cranial crests have obstructed the view both forward and backward, 

 so that this beast probably resembled the rhinoceros in the ease with which 

 it might have been avoided when in pursuit. 



Synonymy. — According to Marsh, he described this species September 

 21, 1872, under the name of Tinoceras grandis, which thus becomes a syn- 

 onym of Loxolopliodon cornutus. As the name Tinoceras had never been 

 described prior to that date, although applied to the Titanotherium (?) anceps 

 Marsh, previously without description, this name becomes a synonym of 

 Loxolopliodon. 



Locality. — The remains of the Loxolopliodon cormitus were found together 

 by the writer in August, 1872, in a ravine of the bad lands of Wyoming. 

 The greater part of the cranium and the femur were excavated from the 

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

 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 Washakie Group of the 

 Eocene, of Hayden. ^ 



An account of the remarkable locality in which I found the specimen 

 was published in the Penn Monthly Magazine for August, 1873. 



LOXOLOPHODON GALEATUS Cope. 



Hobasileus galeatua Cojie, Annual Report U. S. Geol. Surv. Terrs., 1873 (1874), p. 456, pi. i. Paleonto- 



logical Bulletin No. 17, p. 1, October 25, 1873. 

 Plates xliii, xliv. 



Represented by the upper portion of a cranium of an individual of 

 the size of the Loxolojihodon cormitus. The maxillary, palatal and basi- 

 cranial regions and teeth ai-e wanting, and there is no lower jaw. 



The species possesses a greatly elevated occipital crest, whose superior 

 border presents a median angle upward. A short distance in front of it, 

 and connected by a very stout, lateral ridge, there arises, on each side, 



