On the Origin of Species by Means of Natural Selection / or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)

by Charles Darwin

Skulls of young mammals, [197], [436].

Slave-making instinct, [219].

Smith, Col. Hamilton, on striped horses, [164].

——, Mr. Fred., on slave-making ants, [219].

——, on neuter ants, [239].

——, Mr., of Jordan Hill, on the degradation of coast-rocks, [283].

Snap-dragon, [161].

Somerville, Lord, on selection of sheep, [31].

Sorbus, grafts of, [262].

Spaniel, King Charles's breed, [35].