The cave of Saint Jean d'Alcas (Aveyron), explored at different times by M. Cazalis de Fondace, was used as a place of sepulture. It was first examined about twenty-five years ago, and at that time five human skulls, in a good state of preservation, were found, but have been lost, as their importance was not then known. Intermingled with these bones were flint, jade, and serpentine implements, carved bones, remains of rough pottery, stone amulets, and the shells of shell-fish, but no remains of funeral banquets. At the mouth of the cave were two large flag-stones lying across one another. The most recent discoveries in the cave have furnished metallic substances, which would place it, as a habitation, to the last of the neolithic. _Danish Kjökken-Möddings, or Shell-Mounds, or kitchen-refuse heaps._--The refuse heaps of Denmark were carefully examined by Professors Steenstrup, the naturalist, Forchammer, a geologist, and Worsaae, the archæologist, commissioned by the Danish government, their reports being presented to the Academy of Sciences at Copenhagen. They are found chiefly on the north coast of Denmark, and consist of the shells of edible mollusks, such as the oyster, cockle, mussel, and periwinkle. These deposits are from three to ten feet in thickness, from one hundred to two hundred and fifty feet in width, and sometimes as much as one thousand feet in length. In them are found weapons and other instruments of stone, horn, and bone; fragments of rough pottery, stone-wedges, knives, etc., in great abundance, accompanied with charcoal and ashes; no traces of coin, bronze, or iron, or domestic animals, except the dog. The bones of animals are very numerous, but no human bones have ever been discovered. Professor Steenstrup estimates that ninety-seven per cent. of the bones belong to the stag, the roe-deer, and the wild boar. The other remains are those of the urus (_Bos primigenius_), dog, fox, wolf, marten, wild-cat, hedgehog, bear (_Ursus arctos_), and the mouse, and the bones of birds and fishes. The auroch, musk ox, domestic ox, elk, hare, sheep, and domestic hog are absent. The mollusca of these shell-mounds are of a size which are never obtained by the representatives of the same species now living on the Baltic. They are not more than one-half or even one-third the size. At the time of the formation of these mounds, the Baltic was a true sea, or an arm of the ocean, and these mollusks were taken from it. Now the Baltic has not the character of a true sea, but is merely brackish, and the oyster does not occur in the Baltic except at its entrance into the ocean. These deposits have been found several miles inland, which would indicate that the sea had once covered the intervening space. On the western coast they have not been found, in consequence of their having possibly been swept away by the encroachments of the sea. They are also found on the adjacent islands.