. Biology in America. Biology. p^-'-- J -«.*i. An Imaginary Landscape of the Coal-Forming Period Showing stegocephalans and a giant insect in the foreground, with coal-forming plants in the background. After Williston, "Water Kep- tiles of the Past and Present'' (adapted from Neumayr), By permission of the University of Chicago Press. centipedes, insects and snails, while the plants indulged in a veritable riot of luxuriant growth. We may perhaps picture to ourselves the conditions of the evolution of land from water vertebrates in some such way as this: With the gradual recedence of the
. Biology in America. Biology. p^-'-- J -«.*i. An Imaginary Landscape of the Coal-Forming Period Showing stegocephalans and a giant insect in the foreground, with coal-forming plants in the background. After Williston, "Water Kep- tiles of the Past and Present'' (adapted from Neumayr), By permission of the University of Chicago Press. centipedes, insects and snails, while the plants indulged in a veritable riot of luxuriant growth. We may perhaps picture to ourselves the conditions of the evolution of land from water vertebrates in some such way as this: With the gradual recedence of the sea and elevation of the land extensive swamps were formed in which developed a luxuriant vegetation consisting of giant club mosses, "horse tail" and tree ferns and primitive representatives of our modern pines and spruces. In the dense forests bordering the stagnant pools, no touch of bright color was there to enliven the monotony of the scene, for neither bird nor butterfly. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger
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