Sexual selection, supplemental note on.
Sexual similarity.
Shaler, Prof., sizes of sexes in whales.
Shame.
Sharks, prehensile organs of male.
Sharpe, Dr., Europeans in the tropics.
Sharpe, R.B., on Tanysiptera sylvia; on Ceryle; on the young male of Dacelo Gaudi-chaudi.
Shaw, Mr., on the pugnacity of the male salmon.
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.