Flint, indeed, though so widely used as the primitive tool-maker’s material, is unknown in many localities. We are familiar with regions at the present time, where man not only subsists, but supplies himself with implements and weapons adapted to his need, though neither flint nor stone is available. This fact has been practically ignored in the accepted terminology of the science. As now reduced to system, it proceeds in retrospective order thus:—Historic, prehistoric, neolithic, palæolithic, with a possible protolithic period of still older geological epochs. An awkward misnomer inevitably results from this assumption of stone as the sole basis of primitive art: as where the archæologist speaks of palæolithic bone implements, or neolithic pottery. I have therefore substituted here the more comprehensive terms palæotechnic and neotechnic. They suffice equally for the classification of implements and personal ornaments of flint, stone, bone, ivory, or even of metal: as in the neotechnic gold and bronze work; and also for those made from marine shells. Many of the latter have been recovered under circumstances which establish their claim to be classed with other examples of primitive art; and even find illustration among the rarer disclosures of the ancient cave-drift. In the great Archipelago of the Caribbean Sea, as well as in widely scattered islands of the Pacific Ocean, the primeval stage of native art might indeed be more correctly designated a shell period; for until their discovery by Europeans, the large shells which the mollusca of the neighbouring oceans produce in great abundance, furnished to the native artificers the most convenient and easily wrought material. For the natives of the coral islands of the Pacific especially, marine shells supplied the want not only of copper and iron, but of flint and stone; and left them at little disadvantage when compared, for example, with the Indians of the copper regions of Lake Superior. [Illustration: FIG. 22.—Bone Spatula, Keiss. FIG. 23.—Bone Comb, Burghar. FIG. 24.—Bone Comb, Burghar.] Alike in the ivory and bone carvings of the modern Esquimaux, and in the rare but invaluable evidences of primitive art furnished by those of the ancient Cave-Folk of the Dordogne and other oldest human dwellings, it is seen how favourable such easily wrought material was to the development of a mechanical skill and artistic ingenuity such as must have lain dormant had the primitive artificers been wholly limited to flint and stone. The same result is traceable, though in a less degree, to the analogous material of the Islanders’ shell-period. But implements and ornaments made of marine shells have a further interest from the evidence they occasionally afford of distant traffic, or interchange of foreign commodities.