. The descent of man, and selection in relation to sex. Evolution; Natural selection; Sexual selection in animals; Human beings -- Origin; Sexual dimorphism (Animals). Chap. XIL] REPTILES. 33 gascar, is produced into two great, solid, bony projec- tions, covered with scales like the rest of the head; and of this wonderful modification of structure the female ex- hibits only a rudiment. Again, in Chamceleon Owenii (Fig. 36), from the West Coast of Africa, the male bears. Fig. 35.—Chamseleon bifurcus. Upper figure, male ; lower figure, female. * on his snout and forehead three curious horrls, of
. The descent of man, and selection in relation to sex. Evolution; Natural selection; Sexual selection in animals; Human beings -- Origin; Sexual dimorphism (Animals). Chap. XIL] REPTILES. 33 gascar, is produced into two great, solid, bony projec- tions, covered with scales like the rest of the head; and of this wonderful modification of structure the female ex- hibits only a rudiment. Again, in Chamceleon Owenii (Fig. 36), from the West Coast of Africa, the male bears. Fig. 35.—Chamseleon bifurcus. Upper figure, male ; lower figure, female. * on his snout and forehead three curious horrls, of which the female has not a trace. These horns consist* of an ex- crescence of bone covered with a smooth sheath, forming part of the general integuments of the body, so that they are identical in structure with those of a bull, goat, or other sheath-horned ruminant. Although the three horns. 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 Darwin, Charles, 1809-1882. New York : D. Appleton and Co.
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