. Darwin, and after Darwin. An exposition of the Darwinian theory and a discussion of post-Darwinian questions. Evolution; Heredity. Evidences of Theory of Natural Selection. 317 Protective Colouring. A vast number of animals are rendered more or less inconspicuous by resembling the colours of the surfaces on which they habitually rest. Such, for example, are grouse, partridges, rabbits. &c. Moreover, there JiUTUMN. '^'XW -WINTER, Fig. 108.—Seasonal changes of colour in Ptarmigan {Lagofus fiiiitus). Drawn from stuffed specimens in the British Museum, \ nat. size, with appropriate surroundi
. Darwin, and after Darwin. An exposition of the Darwinian theory and a discussion of post-Darwinian questions. Evolution; Heredity. Evidences of Theory of Natural Selection. 317 Protective Colouring. A vast number of animals are rendered more or less inconspicuous by resembling the colours of the surfaces on which they habitually rest. Such, for example, are grouse, partridges, rabbits. &c. Moreover, there JiUTUMN. '^'XW -WINTER, Fig. 108.—Seasonal changes of colour in Ptarmigan {Lagofus fiiiitus). Drawn from stuffed specimens in the British Museum, \ nat. size, with appropriate surroundings supplied. are many cases in which, if the needs of the creature be such that it must habitually frequent surfaces of different colours, it has acquired the power of changing its colour accordingly—e. g. cuttle-fish, flat-fish, frogs, chameleons, &c. The physiological mechanism whereby these adaptive changes of colour are pro-. 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 Romanes, George John, 1848-1894. Chicago The Open Court Pub. Co
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