The human breast is larger in proportion than that of other animals; and none but man, and those animals which make use of their fore feet as hands, such as monkeys, squirrels, &c. have collar-bones. The breasts, in women are larger than in men; they however seem formed in the same, manner; and sometimes milk is found in the breasts of the latter. Of this there have been many instances about the age of puberty, and I have seen a young man press a considerable quantity out of one of his breasts. Among animals there, is a great variety in this part of the body. Some, as the ape and the elephant, have but two teats, which are placed on each side of the breast, Bears have four. Sheep have but two, placed between the hinder legs. Other animals, such as the bitch and sow, have them all along the belly. Birds and other oviparous animals have no teats; but viviparous fishes, as the whale and the dolphin, have both teats and milk. The form also of the teats varies in different animals, and in the same animal at different ages. Those women whose breasts are shaped like a pear, are said to make the best nurses. In the belly of the human race the naval makes a conspicuous figure, but which is scarcely perceptible in other animals. The arms of men but very little resemble the fore legs of quadrupeds, and much less the wings of birds. The ape is the only animal that is possessed of hands and arms; and they are fashioned more rudely, and with less exact proportion, than in men. The shoulders are also much larger in man than in any other animal, and of a form widely distinct. The form of the back differs not much from that of many quadrupeds, only that the reins are more muscular and strong. The buttock, however, in man is different from that of all animals whatsoever. What goes by that name in other creatures is only the upper part of the thigh, and by no means similar: man being the only animal that can support himself perfectly erect, the peculiar hardness of this part enables him to sustain that position. The human feet are also different from those of all animals, even apes not excepted. The foot of the ape is rather a kind of aukward hand; its toes, or rather fingers, are long, and that in the middle longest of all; the foot also wants the heel. In man the sole of the foot is broader and more adapted to maintain the equilibrium of the body in walking, dancing, or running. The nails are smaller in man than those of any animal. If they were much longer than the extremities of the fingers, they would obstruct the management of the hand. Such savages as suffer them to grow long, make use of them in flaying and tearing animals, but though their nails are considerably larger than ours, they are yet by no means to be compared to the hoofs or the claws of other animals.