Polar bodies, Weismann on, [40], [46], [125];
examination of Weismann’s explanation of, [42];
Protophyta, natural selection and, [114].
Protozoa, immortality of, [7];
and natural selection, [15], [114];
origin of species of, [15], [102];
action of environment on, [15];
Maupas on, [101].
R.