The inference which we are forced to draw from these _data_, is this: _As no such tropical and equatorial animals or plants have been known to exist there, nor even herbage of any kind, on which such animals might subsist, since the memory of man, there was a time anciently when the climate suited their growth, and of course was very much warmer than it is known to be now, its temperature then corresponding to the temperature of the present equatorial regions, as it produced and subsisted anciently the animals and plants which the tropical regions produce and subsist at the present time, and which cannot subsist in any other climates._ In proof of the above position, it is well known that animals and plants have their peculiar climates, in which they are _indigenous_, and out of which they cannot thrive, or even live, if too far removed. It is also well known, that the warmer, and more moist the climate is, the more luxuriant the vegetation, and the more huge the animals. Hence we are in the habit of denominating animals and plants by the climates in which they are indigenous, as _arctic_, or northern; _tropical_, or southern. Let us now see if the tropical animals and plants once lived and flourished in high northern latitudes. The best authorities follow. “We proceed now to examine the remains of quadrupeds: _these are found accumulated in regions where similar animals do not_ NOW _exist_. Some are buried deep in gypsum.--Some present themselves to view, accumulated in vast caverns, and destitute of any envelope. The islands of Lachof, situated to the NORTH _of Siberia_, are, according to a modern traveller, _only heaps of sand, ice, and bones of elephants and rhinoceros_, mixed with those of great cetaceous animals, and even, agreeably to the latest accounts, with the remains of gigantic birds. “There have been found in _Siberia, whole carcases of the elephant, covered with their_ FLESH and SKIN, preserved by the frosts which prevail in those regions.--Germany has furnished the greatest number (of bones:)--In France a great many bones of the elephant have been met with. “These discoveries, though as yet scarcely commenced, have thrown already _a new light upon the revolutions which our globe must have undergone, and upon the_ STATES WHICH MUST HAVE PRECEDED THE PRESENT COURSE AND CONSTITUTION OF NATURE.