Spiritual agencies, belief in, almost universal.
Spiza cyanea and ciris.
Spoonbill, Chinese, change of plumage in.
Spots, retained throughout groups of birds; disappearance of, in adult mammals.
Sprengel, C.K., on the sexuality of plants.
Springboc, horns of the.
Sproat, Mr., on the extinction of savages in Vancouver Island; on the eradication of facial hair by the natives of Vancouver Island; on the eradication of the beard by the Indians of Vancouver Island.
Spurs, occurrence of, in female fowls; development of, in various species of Phasianidae; of Gallinaceous birds; development of, in female Gallinaceae.
Squilla, different colours of the sexes of a species of.
Squirrels, battles of male; African, sexual differences in the colouring of; black.