Farre, Dr., on the structure of the uterus.
Fashions, long prevalence of, among savages.
Faye, Prof., on the numerical proportion of male and female births in Norway and Russia; on the greater mortality of male children at and before birth.
Feathers, modified, producing sounds; elongated, in male birds; racket-shaped; barbless and with filamentous barbs in certain birds; shedding of margins of.
Feeding, high, probable influence of, in the pairing of birds of different species.
Feet, thickening of the skin on the soles of the; modification of, in man.
Felis canadensis, throat-ruff of.
Felis pardalis and F. mitis, sexual difference in the colouring of.
Female, behaviour of the, during courtship.
Female birds, differences of.