1884.] The Condylarthra. 899 
published in the NATURALIST, 1883, p. 535, one-seventh natural 
size, and is here reproduced (Pl. XXIX). 
Of the Phenacodus vortmani Cope, Mr. Wortman brought por- 
tions of four mandibles from the Wind River bad lands, and 
thirteen from those of the Big Horn (see Figs. 20, 21). 
The limbs of this species are rather elongate for an Eocene 
mammal, and the anterior limbs are distinctly shorter than the 
posterior. The size of the animal is that of a bull-dog, but the 
head is smaller and the neck rather shorter, and not nearly so 
g. 21. 
epresented in Pl. XXX, one- 
The skull is somewhat dis- 
Original. 
n Plate XXX, 
b, do., dist na and radius from 
; 2, left metatarsus an part of tarsus, exter- 
iew; f, metatarsus, proximal view, hallux displaced. 
robust. The limbs have about the same proportions to the body 
as those of a bull-dog, but the anterior ones are shorter. The 
Ere nops of the parts of the limbs, and of the fore and hind 
imbs to each other, excepting the feet, are much as in the col- 
Phe cary. The feet of the latter animal are longer than in 
nacodus vortmani (Plate XXX). sue 
We can thus imagine the Phenacodus vorimant as an‘animal o 
VOL, XVIII.—nNo, Ix, = s 
