I shall include under the head of beads all small objects having a central or nearly central perforation, made for the purpose of stringing them in numbers. In shape, they range from straw-like cylinders, three, four, and even five inches long, with longitudinal perforations, to thin, button-like disks, two or more inches in diameter. In general the cylinders are made from the columellæ of univalves, and the disks from the outer walls of the same, or from the shells of bivalves. Of course, there are forms that fall under no classification, such as disks with perforations parallel with the faces, or cylindrical forms with transverse perforations, while many small, pendant-like objects, of varied shapes, are strung with the beads, and might be classed with them; but these are exceptions, and can be described along with the classified objects most nearly resembling them.
The grinding down and the perforating of natural shells is easily accomplished, so that any savage could afford to decorate his person with this jewelry in profusion. But the class of beads illustrated in Plates XXXIII, XXXIV, and XXXV could not have been made without the expenditure of much time and labor, and doubtless owe their existence, in a measure, to mercenary motives. As they were made from the walls or columellæ of massive shells, they must have been broken or cut out, ground smooth about the edges, and perforated; this, too, with most primitive tools.
DISCOIDAL BEADS.
In shape discoidal beads range from the concavo-convex sections of the curved walls of the shell to totally artificial outlines, in such forms as doubly-convex disks, cylinders, and spheroids. In size the disks vary from very minute forms, one-tenth of an inch in diameter and one-thirtieth of an inch in thickness, to two inches in diameter and nearly one-half an inch in thickness. The thickness of the finished beads is governed in a great measure by the thickness of the shell from which they are manufactured.
The Venus mercenaria of the Atlantic coast and the heavier Unios of the Mississippi Valley give a general thickness of from one-eighth to three-eighths of an inch, while others, such as the heavy clams of the Pacific, are very much thicker. The walls of univalves, especially near the base, are often extremely heavy, while the smaller varieties of shells furnish specimens of wafer-like thinness.
In Plate XXXIII a series of beads of this class is given, beginning with the smaller disks and ending with those of large, though not the largest, size.
In Fig. 1 I present two views of a minute disk, obtained, with many others of similar shape and size, from a mound on Lick Creek, Tenn. The perforations in these specimens, as well as in most of those that follow, are bi-conical, and sufficiently irregular in form to indicate that they are hand-made. Beads of this general appearance have been found in a multitude of graves and mounds, distributed over a large part of North as well as of South America. A vast majority of these beads are doubtless of aboriginal make, as they are found in the oldest mounds.
Fig. 2 represents a minute form from Santa Cruz Island, Cal. The peripheral surface is ornamented with a net-work of incised lines.
Fig. 3 illustrates a small cylindrical bead, with large perforation, from a mound near Prairie du Chien, Wis. It was found, with a number of others, near the neck of the skeleton of a child.
Fig. 4 represents a small spheroidal bead from the great mound near Sevierville, Tenn.; it is neatly made and well preserved.