The bottom and walls of this cave are furnished with the same mud as the others, but blacker. The bones were pretty numerous, and tinged with the same colour, but only two tolerably entire skulls were obtained. That of which M. Kocher gives a figure, is the species of bear named Ursus spelæus. There are also caves of this kind in Westphalia. J. Es Silberschlag, in the Mem. des Naturalistes of Berlin (Schriften, vol. vi. p. 132), describes the one called Kluter-hœhle, near the village of Oldenforde, in the county of Mark, on the edge of the Milspe and Ennepe, two streams which fall into the Ruhr, and with it into the Rhine. Its entrance is about half-way up a hill called Kluterberg, is only three feet three inches high, and faces the south. The cave itself forms a true labyrinth in the interior of the mountain.

Not far from this, in the same county, at Sundwich, two leagues from Iserlohn, is another cave, which, for about twenty-five years back, has furnished a very large quantity of bones, part of which has been carried to Berlin, and the rest has remained in the country in the hands of various individuals[435].

If we cast a glance upon a general map, it is not difficult to perceive a certain continuity in the mountains in which these singular caves occur. The Carpathians join with the mountains of Moravia and those of Bohemia called Bœhmerwald, to separate the basin of the Danube, from those of the Vistula, Oder and Elbe. The Fichtelgebirge separates the basin of the Elbe from that of the Rhine. The Thuringerwald and the Hartz continue to limit the basin of the Elbe, by separating it from that of the Weser.

These different chains have but slight intervals between them. The caves of Westphalia alone are not connected in so evident a manner with the others.

Very lately, bones have been discovered in a cavern, which extends more towards the south, and is even situate on the other or Italian side of the Alps. It is that of Adelsberg in Carniola, a place situate on the great road from Laybach to Trieste, and about half way between these two cities. The whole of this country is full of caverns and grottoes, which have given rise to numerous sinkings of the surface, thus giving a very singular appearance to the country. Several of these caverns have long been celebrated among naturalists. That of Adelsberg is generally visited by travellers, on account of its being near the highway, and because a river called the Piuka or Poike is lost there, forming a subterranean lake, and emerging again on the north side, under the name of Unz. A hole which the Chevalier de Lowengreif discovered in 1816, in one of its walls, at the height of 14 fathoms, conducted him to a series of new caves of vast extent, and of incomparable beauty, from the lustre and variety of their stalactites.

A part of these caves was, however, known, and must be, or have been accessible, by some other place, for inscriptions were found in them with dates, from 1393 to 1676, together with human bones, and entire carcases, that had been buried there. A German pamphlet was published at Trieste, in which are described all the windings of these subterranean passages, their different halls, their domes, their columns, and all the other appearances produced by their stalactites. We shall not follow the author (M. de Volpi, Director of the School of Commerce and Navigation at Trieste) through this immense labyrinth. Let it suffice to say, that this zealous naturalist asserts his having proceeded more than three leagues, almost in a straight line, and that he was only stopped by a lake which rendered it impossible to go on. It was about two leagues from the entrance that he discovered bones of animals, of which he gives figures, and which he describes under the name of Palæotheria. He had the politeness to communicate to me, says Cuvier, his drawings the year before, but it appears my reply did not reach him, for he makes no mention of it in his book.

Be this as it may, his figures clearly shewed that the bones in question belonged to the great cave-bear. In fact, several of these bones having been presented to the Congress of Laybach, Prince Metternich, whose enlightened taste for the advancement of knowledge has already been of so much service, had the goodness to address them to Cuvier, who disposed them in the Royal Cabinet, where any one may satisfy himself as to their species.

There are, without doubt, caves in many other chains, and several are known in France. Caves occur in Suabia, but no bones have been found in them; and, in general, it appears, that, before the last discoveries, and especially that which has been made in Yorkshire, none were known but those of Germany and Hungary that were rich in bones of carnivora. In truth, the rock of Fouvent, and which contains in one of its cavities bones of hyenas, and at the same time those of elephants, rhinoceroses and horses, might be considered as belonging to this order of phenomena; but as it was not explored to any depth, it cannot be certain that it is so.

The case is different with the Kirkdale Cavern. It having been visited immediately after its discovery by several well informed persons, and especially by Mr Buckland, every thing has been made known with respect to it. It is situated in the East Riding of the county of York, twenty-five miles NNE. of the city of York, and at about the same distance to the west from the sea and the town of Scarborough. The small river of Hodgebeck is lost under ground in the neighbourhood, much in the same way as the Piuka, near Adelsberg. It is placed in one of the limestone hills which form the northern boundary of the vale of Pickering, the waters of which fall into the Derwent. Mr Buckland compares the stone to that of the last strata of the Alpine limestone, such as are seen near Aigle and Meillene.