We have also seen that it is the most flourishing or dominant species of the larger genera within each class which on an average yield the greatest number of varieties, and varieties, as we shall hereafter see, tend to become converted into new and distinct species.
Ikusi dugu, halaber, genero handiagoetako espezie arrakastatsuenak, edo espezie nagusiak klase bakoitzaren barruan, proportzioz aldaki kopuru handiagoa ematen dutenak direla; eta aldakiek, gero ikusiko dugun legez, espezie berri eta bereizi bihurtzeko joera dute.