438 UNGULATA 
1846 from a fragment of a jaw from the London Clay. — Other 
remains were afterwards discovered in France, and lately in great 
abundance, indicating many species from the size of a Tapir to that 
of a Rhinoceros, in the Lower and Middle Eocenes of New Mexico 
and Wyoming in the United States. Coryphodon had forty-four 
teeth; the canines of both jaws were large and sharp pointed, 
and the molars had strongly pronounced oblique ridges. The 
general proportions were those of a Bear, but the tail was of 
moderate length, and the feet short and wide. The femur had 
a third trochanter ; and the cranium was devoid of protuberances. 
Fic. 191.—Palatal aspect of the cranium of Coryphodon hamatus, from the Wasatch Eocene of 
New Mexico. # natural size. (After Cope.) 
The genus should be regarded as the type of a distinct family 
Coryphodontide. 
Suborder CONDYLARTHRA. 
The term Condylarthra has been proposed by Professor Cope 
for a number of generalised and mostly comparatively small Ungu- 
lates, which were probably allied both to the Perissodactyla and 
Artiodactyla, but present characters separating them from those 
divisions as commonly defined. In the structure of the carpus 
and tarsus these forms (which are chiefly known to us from 
the Eocene of the United States) come nearer to the Hyracoidea 
than to any other existing type. As a rule they have the full 
dental formula; the molars are brachydont, generally bunodont, 
and in many instances also tritubercular ; while the premolars are 
always simpler than the molars. 
The humerus is quite peculiar among Ungulates in having an 
