which frequently occurs among American flint implements, of which I am not aware that any example has hitherto been noted in Europe. In its more common form it might be mistaken at the first glance for a broken arrow-head. But the repeated occurrence of examples of this type, with the well-finished edge invariably inclining, with a curve, to the one side, leaves no room for doubt as to its purpose as a scraper, designed to be fastened to a haft, and used for fashioning needles, bodkins, lance-heads, and other implements of ivory, bone, or horn. This type is shown in Fig. 16, picked up in the neighbourhood of Newark. Fig. 17 is another common form, with the edge wrought to one side, but with slighter curve, or inclination otherwise to the side. Both of these are figured the full size; but many specimens occur of larger sizes, and varying curves of the blade, from a long horse-shoe to a broad crescent shape. There are also arrow-heads of analogous forms, but with no curve in the blade. Similar arrow-heads are now made by the Blackfeet Indians out of iron hoops obtained from the Hudson Bay fur traders, and it is said that with those a skilful marksman will behead a bird on the wing. Others of the rarer forms of flint implements include foliated, flamboyant, or fantastically-shaped arrow-heads, and the like implements, of which an example is shown in Fig. 18, and for which it is difficult to assign any specific use. Some of them, indeed, look like the sports of an ingenious workman tempted by chance forms of the fractured flint to try his hand at some fanciful knife, arrow-head, or other implement of unwonted design. [Illustration: FIG. 18.—Foliated Arrow-head.]