. The origin and evolution of life, on the theory of action, reaction and interaction of energy. Fig. 112. The Tree Shrew , considered to be near the pro-totype form of all the higher placentalmammals. Origin of the Mammals, Insec-tivorous, Arboreal To the descent of the mammalsHuxley was the first, in essaying thereconstruction of the great ancestraltree, to apply Darwins principleson a large scale and to prophesythat the very remote ancestralform of all the mammals was of aninsectivore type. Subsequent re-search has all tended in the samedirection, pointing to insectivorou


. The origin and evolution of life, on the theory of action, reaction and interaction of energy. Fig. 112. The Tree Shrew , considered to be near the pro-totype form of all the higher placentalmammals. Origin of the Mammals, Insec-tivorous, Arboreal To the descent of the mammalsHuxley was the first, in essaying thereconstruction of the great ancestraltree, to apply Darwins principleson a large scale and to prophesythat the very remote ancestralform of all the mammals was of aninsectivore type. Subsequent re-search has all tended in the samedirection, pointing to insectivoroushabits and in many ways to arborealmodes of existence as characteristic.


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