Coleoptera, length of life of, [46].

Colpoda cucullus, fission of, [148].

Conjugation, [282], [286].

Continuity of germ-plasm, [104].

Copepods, unequal length of life in the two sexes of parasitic, [58].

Coryne, origin of sexual bud, [205].

Cossus ligniperda, length of larval life of, [15].

Crayfish, length of life of, [6].

Cuckoo, length of life of, [11], [36].

Cyclas, length of life of, [56].