By comparing and combining the above testimonies, it appears to me, that the forests of Gaul and Germany were stocked with elks and rein-deer, and that the passages in Cæsar's Commentaries, can only be applied to those two animals. As the land was cultivated, and the waters became gradually dried up, the temperature of the climate became more mild, and those animals, who delight in cold, immediately abandoned the flat countries, and retired into the snowy region, where they lived in the time of Gaston de Foix; and if they are no longer to be found there, it is because this temperature has been ever since increasing in heat by the almost entire destruction of the forests, by the successive lowering of the mountains, the diminution of the waters, the multiplication of mankind, and by the continual increase of culture, and every other improvement. I am likewise of opinion that Pliny has borrowed from Cæsar almost all he has written of these two animals, and that he was the first author of the confusion in their names. He mentions at the same time the _alce_ and the _machlis_, from which we ought naturally to conclude, that these two names mean two different animals: however, if we remark, 1. That he only simply names the alce without any description whatever. 2. That he alone has used the name _machlis_, which word is not to be found in either Greek or Latin, but appears to be coined, and which, according to Pliny's commentators, is changed into that of _alce_ in many ancient manuscripts. 3. That he attributes to the machlis all what Julius Cæsar gives to the alce; we cannot doubt but the passage in Pliny is corrupted, and that these two names mean the same animal, namely, the elk. This question once decided will also decide another. The _machlis_ being the _elk_, the _tarandus_ must be the _rein-deer_. This name of _tarandus_ is not to be found in any author before Pliny, and in the interpretation of which, authors have greatly varied; however, Agricola and Elliot have not hesitated to apply it to the rein-deer; and for the reasons just deduced, we subscribe to their opinion. Besides, we must not be surprised at the silence of the Greeks on the subject of these two animals, nor at the ambiguity with which the Latins have spoken of them, since the northern climates were absolutely strangers to the first, and only known to the second by relation.