Algae, De Vries on the chromatophores of, [83], [111].

Amphigony, the cause of individual hereditary variation, [91], [100-101].

Amphimixis, see [Sexual propagation].

Ancestral germ-plasm, [123].

Atavism, [3], [91], [105].

B.

Bary, De, on Weismann’s theory, [152].

Basidiomycetes, [90].

Begonia, regeneration in, [4], [52].

Biophores, [123].