id author title date pages extension mime words sentences flesch summary cache txt 22428 Wallace, Alfred Russel Contributions to the Theory of Natural Selection A Series of Essays .txt text/plain 103256 4282 60 origin of species (by means of what was afterwards termed by Mr. Darwin--"natural selection,") as conceived by me before I had the least a number of closely allied representative species exist peculiar to variations in the colour, form, and structure of all animals, has The facts presented by the sexual differences of colour in birds law of protective adaptation of colour and form, which appears to have light-coloured insects are not females of a distinct species, the males _The Law which connects the Colours of Female Birds with the mode of _The Law which connects the Colours of Female Birds with the mode of best known cases in which the female bird is more conspicuously coloured animals resemble the embryonic forms of existing species; but as the _Different effects of Natural Selection on Animals and on Man._ _Different effects of Natural Selection on Animals and on Man._ ./cache/22428.txt ./txt/22428.txt