. Darwinism : an exposition of the theory of natural selection, with some of its applications. Natural selection; Evolution. 72 DARWINISM. 12 3 4 5 6 7 (From Table by Gray. 1864. pJOO.) Fig. 15.—Variation of S skulls (Ursus labiatus).. 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 Wallace, Alfred Russel, 1823-1913. London : Macmillan

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