and idio-plasm, [31], [187];

and germ-plasm, [36];

on inheritance of acquired characters in plants, [93].

Natural selection, the cause of death, [8];

action of, [20];

the material for the operation of, [13], [57];

not the cause of sexual propagation, [13-14];

and the Protozoa, [15], [101-102];

and germ-plasm, [21];

sole cause of organic evolution, [25], [59], [111], [114].