The chipped implements are of flint and very rude, thick, and heavy towards the edge, with a blunt point. They resemble the Palæolithic type, and are found in the raised beaches of Larne, and are known as the ‘Larne Implements.’ Of an equally rude kind are those found in hut-sites round the coast, in the Bann Valley, and elsewhere. Implements of a similar type are found in the shell-mounds of Denmark, in Scandinavia, and other parts of Europe. They are named the ‘kitchen-midden’ type, and are considered to be the earliest worked by Neolithic man. Of the second class many are of flint: the lower part is polished down, giving a fine cutting edge, and the upper portion is left with a rough flaked surface. Many of the larger implements belong to this class, and were the more readily fastened into the haft. These and the polished celts are made of basalt, porphyry, felstone, greenstone, shale, and other rocks; the felstone was much sought for, on account of the fine cutting edge that could be obtained in sharpening. They vary greatly in size, the average being 6 to 8 inches in length, and in breadth 2 to 3½ inches. The largest yet found is in the National Museum: it is of clay slate and about 22 inches long. They vary greatly, too, in shape, and are ovate--that is, of a somewhat egg-shaped form--or triangular, according to the general cast of the sides and edge. [Illustration: Polished Celt of Felstone--scale two-thirds.] [Illustration: Various Types of Stone Celts--scale one-eighth.] [Illustration: Mounted Celt.]