PLATE I, 
SSIrrercirr 
The darkly shaded portions are those in my possession; the feet and me rat cer- 
Original, from AMERICAN NATURALIST, 1882, p. 1029. 
Loxolophodon cornutus Cope, restored to sy nat. size. 
vical vertebrae are restored after Marsh (Uintatherium); the lower jaw after Osborn. 
