x HYVRACODON 2Gs 
molar teeth are strikingly like those of the genus Rhinoceros. 
The fore-feet are pentadactyle, but functionally tetradactyle ; 
(After Osborn and Wortman. ) 
1 
Fic. 136.—Skeleton of Metamynodon planifrons. 
the hind-feet tridactyle. The ulna is less reduced than in 
Hyracodon, and the dorso-lumbar vertebrae are twenty-five. 
The Amynodonts were short, heavy types, probably marsh- 
haunting in habit, and possibly with a proboscis like that of the 
Tapir. The orbit is higher than it is in the purely terrestrial 
