. Darwinism; an exposition of the theory of natural selection, with some of its applications. Natural selection; Evolution. 48 DARWINISM Length of Head famBBi^BaBa) fa/fen as: t/i; standard in each of the above-named species Fio. 2.—Variation of 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 and New York, Macmillan and co.

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