The tapir makes a footprint much like that of a small rhinoceros, being one of the odd- toed ungulates.

More than 200 species of mammal are distinguished by possession of hooves, known as ungulates, and are divided into two orders, even- toed and odd- toed ungulates.

Mr. Burr was so loudly praised for "throwing Darwinism to the dogs," Marsh was completing his series leading from the five- toed ungulates to the horse.