Page:Descent of Man 1875.djvu/677

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* Moles, numerical proportion of the sexes in, 247; battles of male, 500.
 * Mollienesia petenensis, sexual difference in, 337.
 * Mollusca, beautiful colours and shapes of, 263; absence of secondary sexual characters in the, 262.
 * Molluscoida, 159, 262.
 * Monacanthus scopas and M. Peronii, 331.
 * Mongolians, perfection of the senses in, 34.
 * Monkey, protecting his keeper from a baboon, 103, 110; bonnet-, 151; rhesus-, sexual difference in colour of the, 539, 550; moustache-, colours of the, 537.
 * Monkeys, liability of, to the same diseases as man, 7; male, recognition of women by, 8; diversity of the mental faculties in, 27; breaking hard fruits with stones, 50; hands of the, 50, 51; basal caudal vertebræ of, imbedded in the body, 59; revenge taken by, 69; maternal affection in, 70; variability of the faculty of attention in, 74; American, manifestation of reason in, 77; using stones and sticks, 81; imitative faculties of, 87; signal-cries of, 87; mutual kindnesses of, 101; sentinels posted by, 101; human characters of, 150; American, direction of the hair on the arms of some, 151; gradation of species of, 175; beards of, 531; ornamental characters of, 549; analogy of sexual differences of, with those of man, 558; different degrees of difference in the sexes of, 561; expression of emotions by, 572; generally monogamous habits of, 590; polygamous habits of some, 590; naked surfaces of, 600.
 * Monogamy, not primitive, 144.
 * Monogenists, 176.
 * Mononychus pseudacori, stridulation of, 305.
 * Monotremata, 157; development of the nicitating membrane in, 17; lactiferous glands of, 162; connecting mammals with reptiles, 165.
 * Monstrosities, analogous, in man and lower animals, 30; caused by arrest of development, 35; correlation of, 44; transmission of, 173.
 * Montagu, G., on the habits of the black and red grouse, 219; on the pugnacity of the ruff, 361; on the singing of birds, 368; on the double moult of the male pintail, 393.
 * Monteiro, Mr., on Bucorax abyssinicus, 383.
 * Montes de Oca, M., on the pugnacity of male Humming-birds, 360.
 * Monticola cyanea, 456.
 * Monuments, as traces of extinct tribes, 181.
 * Moose, battles of, 501; horns of the, an incumbrance, 515.
 * Moral and instinctive impulses, alliance of, 111.
 * faculties, their influence on natural selection in man, 127.
 * rules, distinction between the higher and lower, 122.
 * sense, so-called, derived from the social instincts, 120, 121; origin of the, 124.
 * tendencies, inheritance of, 124.
 * Morality, supposed to be founded in selfishness, 120; test of, the general welfare of the community, 121; gradual rise of, 125; influence of a high standard of, 132.
 * Morgan, L. H., on the beaver, 67; on the reasoning powers of the beaver, 75; on the forcible capture of wives, 144; on the castoreum of the beaver, 529; marriage unknown in primeval times, 588; on polyandry, 593.
 * Morley, J., on the appreciation of praise and fear of blame, 146.
 * Morris, F. O., on hawks feeding an orphan nestling, 409.
 * Morse, Dr., colours of mollusca, 264.
 * Morselli, E., division of the malar bone, 39.
 * Mortality, comparative, of females and males, 216, 243.
 * Morton, on the number of species of man, 174.
 * Moschkau, Dr. A., on a speaking starling, 85.
 * Moschus moschiferus, odoriferous organs of, 529.
 * Motacillæ, Indian, young of, 468.