Besides these broad crania, M. Lagneaux[162] calls attention to a fragment, sufficiently perfect to indicate a skull of the long type (très dolicho-céphale), and that differed from them in many other particulars. In the Trou du Frontal, therefore, there is proof that a long and a short-headed race lived in Belgium side by side, just as a similar association in the cave of Orrouy establishes the same conclusion as to the neolithic dwellers in France. And since skulls of both these types have been discovered in the neolithic caves of Sclaigneaux and Chauvaux, the interment in the Trou du Frontal may probably be referred to that date. _The Cave of Gendron._ The sepulchral cave of Gendron[163] on the Lesse, in which fourteen skeletons were discovered lying at full length, and in regular order, along with one flake and some fragments of pottery, is of uncertain age, since those articles were found at the entrance, and have no necessary connection with the interments. And if they were deposited at the same time, M. Dupont’s view that they stamp the neolithic age is rendered untenable by the fact that flakes and rude pottery were in use as late as the date of the Roman conquest of Britain, and are frequently met with in association with articles of bronze and of iron. And for the same reasons the neolithic age of the human bones in the Trou de Sureau and of the Trou de Pont-à-Lesse is open to considerable doubt. The contents, however, prove these caves to be post-pleistocene. _Cave of Gailenreuth._ The same uncertainty overhangs the age of the interments in the cave of Gailenreuth, in Franconia, from which Dr. Buckland[164] obtained a human skull of the same broad type as that from Sclaigneaux, along with fragments of black coarse pottery, one of which is ornamented with a line of finger-impressions. The skull is remarkable for the great width of the parietal protuberances, and the flattening of the upper and posterior region of the parietal bone. Its measurements are given in the Table, p. 236, from which it will be seen that it belongs to the same class of skulls as those from the neolithic caves and tumuli of France. _Cave of Neanderthal._