Peccaries.

Ruminants--
Camels, Llamas,
Chevrotains,
Giraffe,
Antelopes,
Sheep, Goats,
Musk-ox,
Oxen,
Deer.

The non-ruminant artiodactyls need not detain us long. Hippopotamuses
are little more than large pigs with four toes; they were never
American, though many species, some very small, are found in the
European Tertiary. The two existing species are African.

In the western hemisphere swine are represented by the peccaries,
differing from them chiefly in having six less teeth, one less accessory
toe on the hind foot, and in a stomach of more complex character.
Peccaries also have the metapodial bones supporting the two functional
digits fused together at their upper ends, forming an imperfect "cannon
bone," which is a characteristic of practically all the ruminants, but
of no other hoofed beasts. One species only enters the United States
along the Mexican border.

All non-ruminant ungulates have from four to six incisors in the upper
jaw; the canines are present, and sometimes, as in the wart hogs, reach
an extraordinary size.