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molar teeth are strikingly like those of the genus Rhinoceros. The fore-feet are pentadactyle, but functionally tetradactyle; the hind-feet tridactyle. The ulna is less reduced than in Hyracodon, and the dorso-lumbar vertebrae are twenty-five.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/be/Cambridge_Natural_History_Mammalia_Fig_136.png/550px-Cambridge_Natural_History_Mammalia_Fig_136.png)
Fig. 136.—Skeleton of Metamynodon planifrons. × 1⁄22. (After Osborn and Wortman.)
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