We may mention, for instance, the arrow and javelin-heads. Some are slender and tapering off at both ends; in others, the base terminates in a single or double bevel. Among the latter, the greater part seem made to fix in a cleft stick; some are ornamented with lines and hatching over their surface. Others have notches in them, somewhat similar to an attempt at barbing. [Illustration: Fig. 52.--The Chase during the Reindeer Epoch.] We now come to the barbed dart-heads, designated by the name of _harpoons_. They taper-off considerably towards the top, and are characterised by very decided barbs, shaped like hooks, and distributed sometimes on one side only, and sometimes on both (figs. 53, 54). In the latter case the barbs are arranged in pairs, and are provided with a small furrow or middle groove, which, according to some naturalists, was intended to hold some subtle poison. Like the present race of Indians of the American forests, primitive man may possibly have poisoned his arrows; and the longitudinal groove, which is noticed in so many reindeer arrow-heads, may have served to contain the poison. [Illustration: Fig. 53.--Barbed Arrow of Reindeer Horn.] [Illustration: Fig. 54--Arrow of Reindeer Horn with double Barbs.] We must not, however, fail to state that this opinion has been abandoned since it has been ascertained that the North American Indians used in former times to hunt the bison with wooden arrows furnished with grooves or channels of a similar character. These channels are said to have been intended to give a freer vent to the flow of the animal's blood, which was thus, so to speak, sucked out of the wound. This may, therefore, have been the intention of the grooves which are noticed on the dart-heads of the reindeer epoch, and the idea of their having been poisoned must be dismissed. These barbed darts or harpoons are still used by the Esquimaux of the present day, in pursuing the seal. Such arrows, like those of the primitive hordes of the reindeer epoch which are represented above (figs. 53, 54), are sharply pointed and provided with barbs; they are fastened to a string and shot from a bow. The Esquimaux sometimes attach an inflated bladder to the extremity of the arrow, so that the hunter may be apprized whether he has hit his mark, or in order to show in what direction he should aim again. We give here (fig. 55) a drawing of a fragment of bone found in the cave of Les Eyzies (Périgord); a portion of one of these harpoons remains fixed in the bone. [Illustration: Fig. 55.--Animal Bone, pierced by an Arrow of Reindeer Horn.]