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.