It is singular in these animals that their species seem to be entirely distinct by itself, and not connected with any other, which may be considered as principal or accessory, like that of the horse with the ass, or the goat with the sheep; nor is it subject to a variety of races like the dog; it participates of many species, yet essentially differs from all. Let those who would circumscribe the immensity of nature into narrow systems, attend to this animal, and they will find it surmounts their methodical arrangements. In its extremities it has no resemblance to whole-hoofed animals, being rather cloven-hoofed, and yet it does not resemble them fairly, because though it appears to have but two toes, yet it has four concealed within; nor does the hog resemble those which have the toes separated, since he walks only on two toes, and the other two are neither so placed, nor extended sufficiently, to be made use of in that respect. Shall we consider this as an error in nature, and that these two toes so concealed ought not to be reckoned? If so, it should be remembered that this error is constant: that besides, the other bones of the feet do not resemble cloven-footed animals, and that there are striking differences in many other respects, for the latter have horns and no incisive teeth in the upper jaw, they have four stomachs, chew the cud, &c. while the hog, on the contrary, has no horns, but one stomach, does not chew the cud, and has cutting teeth both above and below; thus it is evident, he neither belongs to the species of hoofed or cloven-footed animals, and with as little propriety can he be ranked among the web-footed animals since he differs from them not only in the extremities of the feet, but in the teeth, stomach, intestines, and internal parts of generation. All that can be said is, that in some respects he forms the shade between the whole and cloven-footed animals, and in others between the cloven-footed and digitated animals; for he differs less from the whole-hoofed quadrupeds in the form and number of his teeth than from others; he also resembles them in the length of his jaw, and, like them, has but one stomach; but by an appendage annexed to it, as well as by the position of the intestines, he seems nearly to approach the cloven-footed animals, or those who chew the cud. He likewise resembles them in the external parts of generation, and at the same time in the make of his legs, habits of body, number of young, he approaches very near to the digitated quadrupeds.