_ and Mesonyx. The epi- 
1884.] The Condylarthra. 895 
coelous and depressed. No anapophyses on either dorsals or 
lumbars. The latter have well-developed flat diapophyses, and 
the centra are keeled below. The postzygapophyses are not rev- 
olute, but they become oblique, so that the external parts of the 
surfaces are nearly vertical. The caudal vertebrae were probably 
numerous; the proximal have strong transverse processes, and 
the median are robust in the P. primevus. Some of them have 
chevron bones. ` 
The tuberosities of the humerus (Fig. 16, 4 4’) are as well 
developed as in tapi- 
roids, The condyle has 
no intertrochlear ridge, 
but the cylindrical part 
is smaller, as in Oreo- 
don, Anoplotherium 
trochlear foramen is a 
transversely oval, with- 
out inferior interlock- 
ing angle, The distal 
extremity is truncate, 
distinctly separated. 
The distal extremity 
of the ulna is a com- 
Pressed tuberosity 
which is produced be- 
yond the radius, to 
which it is oblique 
(Fig. 16, d). 
The distal keels of 
the metapodial bones Fic 
are distinct, but are” 
quite short and en- front; B/, do. head; ¢, head of radius from below; 
a ar end; 2’, do., distal end. Original, 
tirely posterior. 
Th A ê, tibia, p , Revon U 
e pelvis is of nor- from Wasatch epoch gi Nr From Repo a 
x ol. S ‘ H. 
mal proportions. The S. Geol. Surv. Terrs., I 
