Geology . Fig. 429.—Dinoceras mirabile, restoration of skeleton by Marsh, about 13 feet long, Middle Eocene, Wyoming. (After Marsh.) The divergence of the ungulates into odd- and even-toed.—Early inthe Eocene, the hoofed animals began to diverge into their present divi-sions, the odd-toed (perissodactyls) and the even-toed (artiodactyls). 234 OEOLOOY The disimetion is not so nuicli a matter of toes as oi mode of the odd-toed, the main line of support lies in the axis of the middletoe (Mesaxonia); in the even-toed, il lies between the third and fourthIocs (Paraxonia); in other words,
Geology . Fig. 429.—Dinoceras mirabile, restoration of skeleton by Marsh, about 13 feet long, Middle Eocene, Wyoming. (After Marsh.) The divergence of the ungulates into odd- and even-toed.—Early inthe Eocene, the hoofed animals began to diverge into their present divi-sions, the odd-toed (perissodactyls) and the even-toed (artiodactyls). 234 OEOLOOY The disimetion is not so nuicli a matter of toes as oi mode of the odd-toed, the main line of support lies in the axis of the middletoe (Mesaxonia); in the even-toed, il lies between the third and fourthIocs (Paraxonia); in other words, one main line of support in the first case, and two in the second. In the course of time, the lateral toes fell.
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