But these great advantages are counter-balanced by imperfections still greater. The seal may be said to be deprived of the use of his limbs, as his arms, thighs, and legs are almost entirely shut up within his body, while nothing appears without but his hands and feet, which are, it is true, furnished with five fingers or toes, but which are scarcely moveable, being united by a strong membrane, so that they might more properly be called fins than hands and feet, being more adapted for the purpose of swimming than walking. Besides the hind feet are turned backwards, therefore entirely useless upon land, so that when the animal is obliged to move, he drags himself forward like a reptile, and with efforts much more painful, for as he cannot bend himself in an arch, like the serpent, to obtain the support of different parts, and so advance by the reaction of the ground, he would remain like a lump on the earth if it were not for his hands and tail, and with which he seizes any thing within his reach with such dexterity that he drags himself up the steepest shores, rocks, and even shoals of ice, however steep or slippery. By this method he moves with a much greater degree of swiftness than could be expected, and often, though wounded, escapes the pursuit of the hunters. The seal is a social animal, at least great numbers generally frequent the same places. Their natural climate is the north, but they live in the temperate and even hot countries, for they are seen on the shores of almost all the seas of Europe and even in the Mediterranean; they are found also in the southern seas of Africa and America; but they are infinitely more common and more numerous in the northern seas of Asia, Europe, and America. This species varies in size, colour, and figure, according to the difference of climates. We have seen some of these animals alive, and many of their skins have been sent to us; out of these we have chosen two for our present subject; the first is the common seal of our European sea, of which there are many varieties. We have seen one, the proportions of whose body seemed to differ from any other, its neck being shorter, its body longer, and its claws larger; but these differences are not sufficient to constitute a distinct species. The second is the seal of the Mediterranean and southern seas, which we presume to be the _phoca_ of the ancients, and a distinct species, for it differs from the others in the quality and colour of the hair, which is flowing, and almost black, whereas that of the common kind is grey, and of a bristly nature. Its teeth and ears are also different, for it has a very small external ear, which the other has not; its incisive teeth are likewise terminated with two points, while the teeth of the other are smooth and sharp, like those of the dog, wolf, and other quadrupeds. Its arms, or fins, are also situated lower, that is to say, more backward. Nevertheless, these discrepancies