Begonia, propagation of, [211].
Beneden, van, on fertilization in Ascaris, [177], [188], [355], [360];
on polar bodies, [214], [340], [345], [353];
on Polkörperchen, [216];
on spermatogonia in Ascaris, [220], [375];
on nuclear division, [231];
on sexual reproduction, [282].
Berthold, on male parthenogenesis, [247].
Bessels, on importance of fertilization, [235].
Beyerinck, on the formation of galls, [302].