the points in which all the species of a genus resemble each other, and in which they differ from allied genera, are called generic characters; and these characters may be attributed to inheritance from a common progenitor, for it can rarely have happened that natural selection will have modified several distinct species, fitted to more or less widely different habits, in exactly the same manner:
generoko espezie guztiak elkarren antzeko eta genero hurbilen diferente egiten dituzten puntuei ezaugarri generikoak deritze, eta puntuok arbaso komun batengandiko herentziari iratxeki dakizkioke; izan ere, nekez gerta zitekeen hautespen naturalak modu berberean eraldatu izana aztura gutxi-asko diferenteetara egokituriko zenbait espezie ezberdin;