examination of Weismann’s theory of, [48], [105], [117];

comparison of Weismann’s, Darwin’s, and Galton’s theories of, [51], [105-106];

criticism of Weismann’s theory of by Strasburger, [51];

the material basis of, [61], [63].

Hertwig, O., theory of heredity, [2];

on polar bodies, [46], [125].

Hildebrand, or effect of pollen upon somatic tissues (Xenia), [80];

on Orchideae, [80].

His, theory of heredity, [2].