SCHWALBE, G., on "The Descent of Man".

Sclater, P.L., on geographical distribution.

SCOTT, D.H., on "The Palaeontological Record (Plants)". --elsewhere.

SCOTT, W.B., on "The Palaeontological Record (Animals)".

SEDGWICK, A., on "The Influence of Darwin on Animal Embryology".

Sedgwick, A., Darwin's Geological Expedition with.

Selection, artificial. --germinal.

Selection, natural (see Natural Selection). --organic. --sexual. --social and natural. --various.