We are not certain whether these two names denote animals of different species; we only know that the jackal (_fig. 181._) is larger, more ferocious, and more difficult to be tamed, than the adil; but in other respects they bear a perfect resemblance. The adil, therefore, may possibly be the jackal become smaller, weaker, and more gentle, than the wild race, from being tamed and rendered domestic; for the adil is nearly the same, with respect to the jackal, as the lap-dog, or the little water spaniel, is to the shepherd's dog. However, as this fact is only exemplified in a few particular instances; as the jackal is not, in general, domestic like the dog, and, as such great differences are seldom found in a free species, we are inclined to believe that the jackal and the adil are really two distinct species. The wolf, the fox, the jackal, and the dog, though they approach very nigh each other, form four distinct species. The varieties in the dog species are very numerous; the greatest part of which seems to proceed from their domestic state, to which they have been so long subjected. Man has multiplied the race in this species by mixing the great with the small, the handsome with the ugly, the long haired with the short, &c. But there are many varieties in the dog species, independently of those races produced by the care of man, which seem to derive their origin from the climate. The English bull-dog, the Danish dog, the spaniel, the Turkish dog, the Siberian dog, and others, derive their names from the countries of which they are natives; and there seems to be greater differences between them than between the jackal and the adil. The jackals, therefore, may have undergone several changes from the influence of different climates; and which supposition corresponds with the facts we have collected. From the writings of travellers it appears, that there are different sized jackals in all parts, that in Armenia, Silesia, Persia, and in all that part of Asia, called the Levant, where this species is very numerous, troublesome, and very hurtful; they are generally about the size of our foxes; but their legs are shorter, and the colour of their hair is of a glossy and bright yellow; and this is the reason why they have been called the _yellow_, or _golden wolf_. This species seem to have undergone many varieties in Barbary, the East Indies, the Cape of Good Hope, and in other provinces of Africa and Asia. In these hot countries they are large, and their hair is rather of a reddish brown than of a beautiful yellow; and some of them are of different colours. The species of the jackal is spread all over Asia, from Armenia to Malabar; and is found also in Arabia, Barbary, Mauritania, Guinea, and at the Cape of Good Hope. It seems to supply the place of the wolf, which is wanting, or at least, is very scarce in all these hot countries.