Page:The Scientific Monthly vol. 3.djvu/619

 ORIGIN AND EVOLUTION OF LIFE

��massive head, dependiDg on its short, powerful limbs and broad, spread- ing feet for land propulsion and in a less degree upon its tail for pri>-

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OHcQtia, Bhort-bodled C trial Xjvf, the large, s and Deckert.

��, the free-swlmmlDg

��pulsion in the water. This form may be a collateral ancestor of the Labyrinthodonts ; it belongs to a type which spread all over Kurope and North America and persisted into the Metopias of the Trtassic.

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��Fio. 84. Chief AupniBiiN Typbb of tub Carbomfebods. the early ihort-talled. Jand-llTing AmpMbamut, the silaroander-Iike Bumlcravelon, the eel-bodied PlyonliM, tbe broad-headed, bottom living Dtploeaulut. RestoratloDS lor the Botbor bjr Gregory and Deckert.

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