FIG. 71. (S. 1–2 to 1–3.) Lance-heads. Beautiful forms of art in flint. Materials: argillite and jasper. Stephen Van Rensselaer’s collection, Newark, New Jersey. ] Fig. 57 presents long, slender lance-heads, or possibly knives from Mr. Braun’s collection, East St. Louis. The originals of these are about three times the size of the figure. About East St. Louis is the famous Cahokia Mound, with some thirty other mounds. The art in stone of this region is very high, and some of the best implements in the country have been found on either side of the Mississippi River, near the present site of St. Louis. Specimens pointed at both ends are more common on the Pacific Coast and in the Colorado Valley than elsewhere in the United States. Some of the large problematical forms in flint from Tennessee and Kentucky are of this type. Fig. 67 presents two pointed at either end. Some simpler forms are shown in Fig. 55, and in groups of chipped objects of all kinds are some more or less pointed at either end, notably Figs. 68 and 73. [Illustration: FIG. 72. (S. 2–5.) Wisconsin-Michigan types of knives and slightly shouldered objects. S. D. Mitchell collection, Ripon, Wisconsin. ] [Illustration: FIG. 73. (S. 1–2.) Five knives and two spear-heads. These are typical Wisconsin objects of sugar quartz and argillite. The one to the left has two ends and convex sides. The next, E 268, has a straight back and a convex edge. It is a remarkable knife. The others are all interesting specimens. Beloit College collection, Beloit, Wisconsin. ] There are many knives irregular in form, and it is quite difficult to select specimens having one side straight and the other convex, as mentioned by the Nomenclature Committee. However, in Figs. 52, 61, and 65 are several knives having one side straight and the other convex; or the sides may be irregular. It is difficult to classify the knives just cited under an arbitrary rule on this account. Attention is particularly called to these figures. Each one of these knives represents individual fancy on the part of the owner, yet they are more serviceable than the ordinary oval knife so common throughout the country. I would add to the Committee’s classification, as deserving of a special place, knives so chipped that they appear to have handles. Fig. 65. From Central Wisconsin I illustrate six knives, two of which have convex ends. The others are not as pronounced, and two of the specimens show the first steps in shouldering or stemming. All that was necessary to shoulder an implement was to chip a little on either side, thus making a shoulder. The two specimens above and below the shouldered object belong to the shoulder class, but as they are so slightly shouldered I have left them in this illustration to emphasize the observation.