Selection of male by female birds.
Selection, methodical, of Prussian grenadiers.
Selection, sexual, explanation of; influence of, on the colouring of
Lepidoptera.
Selection, sexual and natural, contrasted.
Self-command, habit of, inherited; estimation of.
Self-consciousness, in animals.
Self-preservation, instinct of.
Self-sacrifice, by savages; estimation of.
Semilunar fold.
Semnopithecus, long hair on the heads of species of.
Semnopithecus chrysomelas, sexual differences of colour in.
Semnopithecus comatus, ornamental hair on the head of.
Semnopithecus frontatus, beard etc., of.
Semnopithecus nasica, nose of.
Semnopithecus nemaeus, colouring of.
Semnopithecus rubicundus, ornamental hair on the head of.
Senses, inferiority of Europeans to savages in the.
Sentinels, among animals.
Serpents, instinctively dreaded by apes and monkeys.
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