Chapters on Evolution

adult air-bladder animal or plant animal world animalcule animals and plants appear appendages ascidian Axolotl barnacle become biological bird body bone buds Campodea cells changes chiton cilia colonial common connected constitution crab cross-fertilisation crustaceans curious Darwin degeneration descent discover epoch evolution evolutionist exhibit existence extinct fact favour fertilisation firstly fish flowers formation fossils frog geological germ gills higher animals idea illustrated individual insects jaws lampshells lancelet larva larvæ latter life-history likewise limbs living lobster marsupials ment metamorphosis missing links modification named naturalist nature Nauplius neighbours notochord organisation organs origin pairs period phases pistil pollen pollen-grains possess present primitive primrose produced protoplasm pteropod quadrupeds race regarded remarks represented reptiles resemblance Sacculina scientific sea-squirt seen skull special creation species sponge stage stamens Starfishes structure tail theory tion to-day trace variation vertebrate whilst wings worm young zoophyte