and if individuals alone exist, how can the differences which may be observed among them prove the variability of species?"

He was watching a little group of stars in the Milky Way, in one of which his chief had seen or fancied a remarkable colour variability.

The color of the Polynesians may be out and out from natural causes different, "their entire physical appearance indicates the greatest variability."

With great interest I had studied natural selection, the variability of animals under different conditions of struggling existence, the law whereby one animal struck down and devoured another.