Page:On the Fourfold Root, and On the Will in Nature.djvu/295

 ANATOMY. 263

of the classification of animals in vertebrata and non-vertebrata, so admirable in depth of view. For he quite seriously maintains and tries to prove at length, that the shape of each animal species, the weapons peculiar to it, and its organs of every sort destined for outward use, were by no means present at the origin of that species, but have on the contrary come into being gradually in the course of time and through continued generation, in consequence of the exertions of the animal's will, evoked by the nature of its position and surroundings, through its own repeated efforts and the habits to which these gave rise. Aquatic birds and mammalia that swim, he says, have only become web-footed through stretching their toes asunder in swimming; moor-fowl acquired their long legs and necks by wading; horned cattle only gradually acquired horns because as they had no proper teeth for combating, they fought with their heads, and this combative propensity in course of time produced horns or antlers; the snail was originally, like other mollusca, without feelers; but out of the desire to feel the objects lying before it, these gradually arose; the whole feline species acquired claws only in course of time, from their desire to tear the flesh of their prey, and the moveable coverings of those claws, from the necessity of protecting them in walking without being prevented from using them when they wished; the giraffe, in the barren, grassless African deserts, being reduced for its food to the leaves of lofty trees, stretched out its neck and forelegs until at last it acquired its singular shape, with a height in front of twenty feet, and thus De Lamarck goes on describing a multitude of animal species as arising according to the same principle, in doing which he overlooks the obvious objection which may be made, that long before the organs necessary for its preservation

1 De Lamarck, Philosophie Zoologique, vol. i. c. 7, and ''Histoire Naturelle des Animaux sans Vertèbres," vol. i. Introd. pp. 180-212.

264