In Asia they gave rise to the elephants, while they themselves originated in Africa from ungulates of more normal type.
It also shows that the anterior molars of elephants do not correspond to the premolars of other ungulates, but to the milk-molars, the early loss of which in consequence of the peculiar process of horizontal forward-moving (From Owen.) FIG.
Size.) occurrence in the fossil state of perissodactyle ungulates allied to the horse, although it was long before the relationship was recognized.
The Perissodactyla have been brigaded with the Artiodactyla to form the typical group of the ungulates, under the name of Diplarthra, or Ungulata Vera, and the features distinguishing the combined group from the less specialized members of the order Ungulata will be found under the heading of that order.
These tiny animals, commonly known as mousedeer, are in no wise nearly related to the true deer, but constitute by themselves a special section of artiodactyle ungulates known as Tragulina, for the characteristics of which see ARTIODACTYLA.
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