He differs also from the hog in a number of characteristics, both external and internal. He is less corpulent, and his legs are shorter; in the stomach and intestines, there is a difference of conformation. He has no tail, and his bristles are much stronger than those of the wild boar; and, lastly, he has on his back, near the crupper, an opening from which there is discharged an ichorous humor of a very disagreeable smell. This is the only animal which has an opening in this part of the body. In the civets, the badger, and the genet, the reservoir for their perfume is situated beneath the parts of generation; and in the musk-animal, and the musk-rat of Canada, we find it under the belly. The moisture which exudes from this aperture in the back of the Mexican hog, is secreted by large glands, which M. Daubenton has described with much attention, as well as the other singularities of this animal; Dr. Tyson also in the Philosophical Transactions, No. 153, has given a good description of it. Without minutely detailing the observations of these two able anatomists, I shall barely remark, that the latter was mistaken in asserting that this animal has three stomachs, or, as Mr. Ray says, a gizzard and two stomachs. M. Daubenton plainly shews, that it is only one stomach divided by two similar pouches, which give it the appearance of three; that only one of these pouches has a pyrolus, or orifice below, for the discharge of its contents; that, consequently, we ought to consider the two others merely as appendages to, or rather portions of, the same stomach. The Mexican hog might be rendered a domestic animal like the common kind; he has nearly the same habits and natural inclinations; feeds upon the same aliments, and his flesh, though more dry and lean, is not unpalatable, and may be improved by castration. When killed, not only the parts of generation, if the flesh is intended to be eaten, (as is also done with the wild boar) must be taken instantly away, but also the glands at the opening in the back, and which are common to both male and female, must likewise be removed, for if this operation be deferred for only half an hour, the flesh becomes utterly unfit to be eaten.