figure of, [203].
Pangenesis, theory of, [77], [165], [166], [193], [316], [327].
Panmixia, principle of, [90], [140], [291], [430].
Papaver, production of double flowers of, [408].
Paranucleus, [376];
of the sperm-cell, [221].
Parrots, length of life of, [36].
Parthenogenesis, the origin of, [225], [290], [323], [339];
not ancestral, [228];
of bees, [235];