felt bound to remodel their earlier conceptions by the light of the new Darwinian hypotheses. Those who failed by congenital constitution to do so, like Carlyle and Carpenter, were, philosophically speaking, left hopelessly behind and utterly extinguished. Those who only half succeeded in thus reading themselves into the new ideas, like Lewes and Max Müller, lost ground immediately before the eager onslaught of their younger competitors. 'The world is to the young,' says the eastern proverb; and in a world peopled throughout in the high places of thought by men almost without exception evolutionists, there was little or no place for the timid group of stranded Girondins, who still stood aloof in sullen antique scientific orthodoxy from what seemed to them the carmagnoles and orgies of a biological Thermidor. At the same time, it must be steadily remembered that there are many naturalists at the present day, especially among those of the lower order of intelligence, who, while accepting evolutionism in a general way, and therefore always describing themselves as Darwinians, do not believe and often cannot even understand the distinctive Darwinian addition to the evolutionary doctrine--namely, the principle of natural selection. Such hazy and indistinct thinkers as these are still really at the prior stage of Lamarckian evolutionism. It is probable that in the future, while a formal acceptance of Darwinism becomes general, the special theory of natural selection will be thoroughly understood and assimilated only by the more abstract and philosophical minds. Our children will be taught as a matter of course the doctrine of development or of descent with modification; but the rationale of that descent will still remain in all likelihood always beyond the grasp of most of them: just as thousands accept on authority the Copernican astronomy, who would never even be capable of comprehending the simplest proofs of the earth's annual movement round the sun. Thus the name of Darwin will often no doubt be tacked on to what are in reality the principles of Lamarck.