Shaw, J., on the decorations of birds.
Sheep, danger-signals of; sexual differences in the horns of; horns of;
domestic, sexual differences of, late developed; numerical proportion
of the sexes in; inheritance of horns by one sex; effect of castration;
mode of fighting of; arched foreheads of some.
Sheep, Merino, loss of horns in females of; horns of.
Shells, difference in form of, in male and female Gasteropoda;
beautiful colours and shapes of.
Shield-drake, pairing with a common duck; New Zealand, sexes and young
of.
Shooter, J., on the Kaffirs; on the marriage-customs of the Kaffirs.
Shrew-mice, odour of.
Shrike, Drongo.
Shrikes, characters of young.
Shuckard, W.E., on sexual differences in the wings of Hymenoptera.
Shyness of adorned male birds;
Siagonium, proportions of the sexes in; dimorphism in males of.
Siam, proportion of male and female births in.
Siamese, general beardlessness of the; notions of beauty of the; hairy
family of.
Sidgwick, H., on morality in hypothetical bee community; our actions
not entirely directed by pain and pleasure.
Siebold, C.T., von, on the proportion of sexes in the Apus; on the
auditory apparatus of the stridulent Orthoptera.
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