The Descent of Man and Selection in Relation to Sex

acquired action adult American anthropomorphous apes appear Ascidians baboon Bates beautiful become beetles believe birds births body brain breed Brehm butterflies chimpanzee common crustaceans degree developed distinct species domestic doubt elytra existing extremely fact faculties feel fishes Fritz Müller genus given greater number habits hair higher Hist horns imitation individuals infanticide inhabitants inherited insects instance islands kind large number larvæ latter Lepidoptera less likewise lower animals Lubbock males mammæ mammals manner Marsupials mental powers modified monkeys moral moths Müller muscles natural selection naturalist observed offspring organs Origin of Species ornaments Orthoptera period polygamous possess present probably Proc produced Prof proportion Quadrumana races rasp reason remarks resemble respect rudimentary savages secondary sexual characters seems sexes sexual selection shew shewn skull social instincts stridulating structure sulci surface sympathy tion transmitted tribe variable Variation of Animals various vertebrate Wallace wings young Zoolog