The cromlechs consist of from three to five large stones standing upright, and so placed as to form a ring, with a large block or boulder on the top. These were intended for a single body, buried in a sitting position, with flint implements and weapons. The walls of the chamber were made by large stones, smooth inside, and the floor consisted of sand or gravel. Certain marks on the tops of stones seem to indicate that sacrifices to the dead were prevalent; holes about 2 inches in width are found on the roofs of some cromlechs and passage graves. These cromlechs always occur near the sea, seldom more than seven miles from the coast. The other graves of the stone age are often found far inland, but they are almost always near a lake or river having connection with the sea. [Illustration: Fig. 2.—Cromlech near Haga, Bohuslän. ] [Illustration: Fig. 3.—Cromlech (stendös) with concave recesses on the roof-stone, near Fasmorup, in Skåne. ] The cromlechs which appear to be the latest graves of this age have a much wider distribution than the other forms; they are found in nearly all the provinces where the older forms of graves occur. Most of them were in or on the top of a mound, which almost always had the roof, and in most cases part of the wall, uncovered. The mound, which is generally round, sometimes oblong, is surrounded at its base by stones often very large; when this was oblong, the grave was nearer the one end than the other. [Illustration: Fig. 4.—One of three oblong cromlechs, distance between each about 120 feet, length 52 feet, and width 20 feet, position north and south, Lille Rorbœk, Zeeland. The central one had two stone-built chambers, both with the entrance from the east. The southern burial chamber is now destroyed, while the northern is completely preserved. It is 5½ feet long, and 3 feet wide, and has four walls of stone, three of which support a stone roof. ] [Illustration: Fig. 5.—Sepulchral chamber covered with a mound, Kallundborg, Zeeland; height about 16 feet. In levelling the mound the earth was found to contain articles which tend to show the existence of a “kjókkenmödding.” ] [Illustration: Fig. 6.—Passage grave on Axvalla heath, near Lake Venern, Vestergötland, Sweden, situated on a hill overlooking a flat country. Numerous graves belonging to that period are found in the neighbourhood. The walls are made by large slabs, those in the passage being lower than the slabs of the quadrangle. The roof is of flat slabs of granite, 5 to 6 feet above the floor, a similar one serving as a door, closing the outer end of the passage, which is 20 feet long, and 2½ to 3 feet broad, and 3 feet high. The mortuary itself (the quadrangle) is 32 feet long by 9 feet broad.