Evolution: Its Nature, Its Evidences, and Its Relation to Religious Thought

according adaptive modifications Agassiz already amphibians aortic arches appendages arthropods beautiful become birds brain breeding called cause cells cerebellum cerebrum CHAPTER commencing completely continued cross-breeding cross-sterility crustaceans Darwin digitigrade direction distinct divergent variation Divine earth embryonic development environment Eocene evidence example fact faunas and floras fishes forces function genera germ-cells gradual groups higher animals higher plane homology horse human evolution idea individual infinite inherited intermediate links isolation kind Lamarckian Lamarckian factors law of evolution lower mammals material ment mind Miocene mode natural process natural selection necessary offspring ontogenic ontogenic series optic lobes organic evolution organic forms organic kingdom origin of species perissodactyl phenomena physical Pliocene progress psychical race rational relation reproduction reptiles scientific separated sexual sexual selection spirit stages structure successive supernatural supposed taxonomic series theory of evolution thought tion toes traced true truth varieties vertebrate whole wholly