We should not be able to recognise a species as the parent of another and modified species, if we were to examine the two ever so closely, unless we possessed most of the intermediate links; and owing to the imperfection of the geological record, we have no just right to expect to find so many links.
Ez genuke modurik espezie bat beste espezie eraldatu baten gurasoa dela esateko, arretarik handienaz biak aztertu ahal izanik ere, bitarteko katenbegirik gehienak ukan ezean; eta geologi erregistroen ezosotasuna dela eta, ezin dugu espero izan horrenbeste katenbegi aurkitzerik.