but with respect to important characters, I have repeatedly noticed in works on natural history, that when an author remarks with surprise that some important organ or part, which is generally very constant throughout a large group of species, DIFFERS considerably in closely-allied species, it is often VARIABLE in the individuals of the same species.
baina garrantzizko ezaugarriei dagokienez, behin eta berriz konturatu naiz historia naturaleko liburuetan, autore batek organo edo atal inportante bat harriduraz ohartematen duenean, eskuarki espezie talde handi batean oso iraunkorra dena, espezie oso hurbiletan aski ezberdina dela, eta organo hori espezie bereko banakoetan maiz oso aldagarria izaten dela.