. Darwinism; an exposition of the theory of natural selection, with some of its applications. Natural selection; Evolution. Ill OF VARIATION 67 30 32. 5 10 15 20 25 30 32 Fio. 13.—Sciurus carolinensis. 32 specimens. 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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