Echinodermata, origin of germ-cells, [202].
Echinus, polar bodies of, [351].
Ectocarpus, male parthenogenesis in, [247].
Eggs, number laid by various birds, [12], [37];
of insects, [17].
Eider-ducks, length of life of, [11].
Eimer, on the inheritance of mutilations, [426].
Eleodes grandis, and dentiper, length of life of imago of, [47].
Elephants, length of life of, [6];
gestation of, [7].