Hence, as has often been remarked, a species may depart from its allies in several characters, both of high physiological importance, and of almost universal prevalence, and yet leave us in no doubt where it should be ranked.
Horrexegatik, maiz ohartarazi den moduan, ezaugarri ezberdinek, garrantzi fisiologiko handia eta iraunkortasun ia orokorra dutenek, bereiz dezakete espezie jakin bat bere kideengandik, duda izpirik utzi gabe espezie horri dagokion sailkapenaz.