The specimen shown in Fig. 4 was obtained from a mound on Fain's Island, Tennessee. The disk is somewhat more convex on the front than is indicated in the engraving. It is two and a half inches in diameter, and is quite thin and fragile, although the surface has not suffered much from decay. The margin is ornamented with twenty-four very neatly made notches or scallops. Immediately inside the border on the convex side are two incised circles, on the outer of which two small perforations for suspension have been made; inside of these, and less than half an inch from the margin, is a circle of seventeen sub-triangular perforations, the inner angle of each being much rounded. Inside of this again is another incised circle, about one and one-fourth inches in diameter, which incloses the highly conventionalized figure of an insect resembling a spider. In a general way--in the number and arrangement of the parts--this figure corresponds pretty closely to the very realistic spiders of the three other disks; in detail however, it is quite unlike them. It is much more highly conventionalized--the natural markings of the body being nearly all omitted, and the legs being without joints and square at the tips. The cross does not appear on the body, but its place is taken by a large conical perforation, made entirely from the convex side. The central segment of the body is round, as in the other cases; to this the four pairs of legs are attached. Without reference to the other specimens, it would be difficult to distinguish the anterior from the posterior extremity, and even with this aid we cannot be quite certain. The larger extremity is somewhat triangular in outline and is ornamented with two cross lines and two eyes. Were it not for the fact that these eyes resemble so closely those found in the other specimens I should call this the posterior extremity, as the opposite end terminates in a pair of well-shaped mandibles, the triangular space between them being cut quite through the disk. The section of the body between this and the central circle also resembles the head, which suggests the conclusion either that the eyes are misplaced or that, as drawn, they are only intended to represent the bright spots of the insect's body. The rarity of these spider gorgets makes it seem rather remarkable that specimens should occur in localities so widely separated as Fain's Island and Saint Louis, but the races inhabiting this entire region, are known to have had many arts in common, and besides this it is not impossible that the same tribe or clan may, at different times, have occupied both of these localities. The marked differences in the design and execution of these specimens, however, indicate a pretty wide distinction in the time or art of the makers. [Illustration: PL. LXI--SPIDER GORGETS. 1. From a mound, Missouri. 2. From a stone-grave, Illinois. 3. From a mound, Illinois. 4. From a mound, Tennessee. (1/1)] THE SERPENT.