Beard, development of, in man; analogy of the, in man and the
quadrumana; variation of the development of the, in different races of
men; estimation of, among bearded nations; probable origin of the.
Beard, in monkeys; of mammals.
Beautiful, taste for the, in birds; in the quadrumana.
Beauty, sense of, in animals; appreciation of, by birds; influence of;
variability of the standard of.
Beauty, sense of, sufficiently permanent for action of sexual
selection.
Beaven, Lieut., on the development of the horns in Cervus Eldi.
Beaver, instinct and intelligence of the; voice of the; castoreum of
the.
Beavers, battles of male.
Bechstein, on female birds choosing the best singers among the males;
on rivalry in song-birds; on the singing of female birds; on birds
acquiring the songs of other birds; on pairing the canary and siskin;
on a sub-variety of the monk pigeon; on spurred hens.
Beddoe, Dr., on causes of difference in stature.
Bee-eater.
Bees, pollen-baskets and stings of; destruction of drones and queens
by; female, secondary sexual characters of; proportion of sexes;
difference of the sexes in colour and sexual selection.
Beetle, luminous larva of a.
Beetles, size of the cerebral ganglia in; dilatation of the foretarsi
in male; blind; stridulation of.
Belgium, ancient inhabitants of.
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