30 Department of Vertebrate Palceontology. 



short, the head rather small, the body extremely thick and 

 barrel -like, the belly almost reaching the ground. 



OsBORN, Bull. Mus. Comp. Zool., XX, p. 92 ; Bull. Am. Mus. Nat. Hist., 



X, 1898, p. 51. 

 WiLLiSTON, Restoration oi Aphelops fossiger, Kans. Univ. Quar., 1894, 



p. 289, pi. viii. 



II. Caenopus tridactylus (Osborn). 



Am. Mus. No. 538. 



This skeleton was found by the American Museum Field 

 Party in 1892, and was the first skeleton mounted by the 

 Department; although very complete it is considerably 

 crushed, and has been mounted in low relief. The skeleton as 

 it lay in the rock was doubled over on itself; it has been 

 straightened out and a missing fore limb modelled in plaster, 

 otherwise it is in the position that it had in the rock. The 

 matrix is chiefly plaster, colored and chipped to imitate the 

 surface of the gray sandstone original. Length from tip of 

 nasals^to bend of tail, 7 feet 9 inches. The animal was about 

 the size of the living Sumatran Rhinoceros, but was hornless, 

 or with rudimentary paired horns on the male. 



Osborn & Wortman, Fossil Mammals of the Lower Miocene White 

 River Beds, Bull. Am. Mus. Nat. Hist., VI, 1894, pp. 206-207, pl- 

 iii. 



Osborn, Mem. Am. Mus. Nat. Hist., Vol. I, Pt. IV, Oct., 1899. 



12. Phenacodus wortmani Cope. 



Am. Mus. No. 4378. 



This small species of Phenacodus was found by Dr. Wort- 

 man in the same beds as P. primcevus. This skeleton was 

 mounted in the original matrix in the Cope Collection, but has 

 been chiselled out of the rock and remounted in low relief, the 

 missing parts of the bones being restored in plaster. Each 

 bone is easily removable for separate study. 



Cope, Tertiary Vertebrata, p. 464, pl. xxixe. 



