Mr. Darwin’s theory of ‘Sexual Selection,’ pp. 240, _et seq._—Contradiction between the theories of natural and sexual selection, pp. 241, _et seq._—The colours of flowers, pp. 242, _et seq._—Mr. Wallace’s theory of the sexual colours of animals, p. 243.—The sexual colours make it easier for the sexes to find each other, pp. 243, _et seq._—They occur exactly in those species whose habits and manner of living make these colours most visible, pp. 244, _et seq._—The odours of flowers, p. 246.—Sexual odours and sounds among animals, pp. 246, _et seq._—The sexual colours, odours, and sounds of animals complementary to each other in the way that is best suited to make the animals easily discoverable, pp. 247-249.—The untenableness of Mr. Darwin’s theory, p. 249.—The secondary sexual characters due to natural selection, pp. 249, _et seq._—Mr. Wallace’s views, p. 250.—Animal ‘ornaments,’ pp. 250, _et seq._—Further arguments against Mr. Darwin’s theory, p. 251.—The variability of the secondary sexual characters, pp. 251. _et seq._—Their stability in wild species, p. 252. CHAPTER XII THE SEXUAL SELECTION OF MAN: TYPICAL BEAUTY Female selection among animals and the indifference of the males, p. 253.—Woman more particular in her choice than man, pp. 253, _et seq._—Female appreciation of manly strength and courage, pp. 255, _et seq._—Men attracted by healthy women, p. 256.—The connection between love and beauty not peculiar to the civilized mind, p. 257.—Different notions of personal beauty, pp. 257, _et seq._—Mr. Spencer’s theory of ‘facial perfection,’ pp. 258, _et seq._—Men find beauty in the full development of the visible characteristics belonging to the human organism in general, p. 259.—Of those peculiar to the sex, pp. 259, _et seq._—Of those peculiar to the race, pp. 261-264.—The connection between love and beauty due to natural selection, pp. 265, 273, _et seq._—Individual deviations from the national type less considerable among savages than among civilized men, pp. 265, _et seq._—Racial peculiarities in some way connected with the external circumstances in which the various races live, pp. 266-271.—Acclimatization, pp. 268-270.—Professor Weismann’s theory of heredity applied to the origin of the human races, pp. 271-273.—Physical beauty the outward manifestation of physical perfection, pp. 273, _et seq._—Rejection of Mr. Darwin’s opinion on the connection between love and beauty, pp. 274, _et seq._—Rejection of his theory as to the origin of the human races, pp. 275, _et seq._—The hairlessness of man, pp. 276, _et seq._—The influence of sexual selection on the physical aspect of mankind, p. 277. CHAPTER XIII THE LAW OF SIMILARITY