6. _The bison of America might come originally from the bison of Europe._ We have already laid down the foundation of this opinion in our discourse on the animals of the two continents; they are the result of the experience of M. de la Nux, who has given much information on this subject. He has informed us, that the bisons, or hunched oxen, of India and Africa, copulate with the bulls and cows of Europe, and that the hunch is only an accidental character, which diminishes in the first generation, and disappears in the second or third. Since the bisons of India are of the same species as our oxen, and have, consequently the same origin, is it not natural to extend this organ to the bison of America? Every thing seems to concur in support of this supposition. The bisons appear to be originally of cold and temperate regions; their name is derived from the German language; the ancients say that they were found in that part of Germany which borders on Scythia; and there are now bisons in the north of Germany, in Poland, and in Scotland; they might, therefore, have passed into America, or even have come from thence, as they are animals common to the two continents. The only difference between the bisons of Europe and those of America is, that the latter are less. But even this difference is a new presumption that they are of the same species, for we have already remarked, that generally both domestic and wild animals, which have passed of themselves, or have been transported, into America, have, without any exception, diminished in size; besides, all the characters, even the hunch, and the long hairs at the hinder parts, are the same in the bisons of America and in those of Europe; thus we cannot refuse to regard them, not only as animals of the same species but also of the same race. 7. _The urus, or aurochs, is the same animal as the common bull, in his wild and natural state._ This position is clear, as the figure and constitution of the body of the aurochs is perfectly similar to that of our domestic bull. The aurochs is only larger and stronger, like every other animal who enjoys his liberty. The aurochs are still to be met with in some provinces of the north. The young aurochs have been taken from their mothers, and being reared, when of a proper age have copulated with the domestic bulls and cows, so that we cannot doubt but they are of the same species.