Somatic reproduction, [35], [52].
Somato-plasm and germ-plasm, [29].
Specialized congenital changes, [65].
Species, Weismann on the origin of new, [100-101].
Spencer, Herbert, theory of heredity, [2];
on Telegony, [191] et seq.
Stability of germ-plasm, see [Germ-plasm].
Stirp, and gemmules, [58-59], [61];
and somatic tissues, [60];
and the germinal cells of Hydromedusae, [73];