modifications of theory of heredity, [28], [46], [52], [65], [68], [75], [163] et seq.;
and of self-multiplication of idio-plasm, [34];
on “ontogenetic grades,” [35], [53];
on the modification of germ-plasm, [36];
on chromatin, [38];
on individual differences, [39], [41], [43];
on the size of ova, [39];
on polar bodies, [40], [42], [46], [125];
on the number of germ-cells, [44-45];