Fig. 197.—Chipped flint, triangular.
Fig. 198.—Chipped flint, concave edges.
3. Concave edges, as in [figure 198] (from Bledsoe county, Tennessee). Other examples of this class are from eastern Tennessee; Scioto valley, Ohio; northeastern and southwestern Arkansas; Kanawha valley, West Virginia; northeastern Kentucky; western and central North Carolina; northeastern Alabama; southwestern Illinois; and Savannah, Georgia.
C. Convex bases. Less abundant than the preceding, and the forms representing it are less variable. Its sub-groups are as follows:
Fig. 199.—Chipped flint, convex base.
1. Convex edges. Some of these have a slight reverse curve at the base, giving a slight barb or shoulder. A few are widest at or near the middle, with bases somewhat pointed, but most of them are widest at the junction of the base and edges. They are mostly of the leaf-shaped type, but quite small. [Figure 199] (Mississippi county, Arkansas) is a good example. Others are from northeastern and southwestern Arkansas; northeastern Alabama and Coosa valley; Kanawha valley, West Virginia; eastern Tennessee; western and central North Carolina; northwestern Georgia; eastern Wisconsin; southwestern Illinois, and Miami valley, Ohio.
2. Edges concave or nearly straight. There are very few of this form, as nearly all with the base convex have the edges also convex. The type ([figure 200]) is from Lawrence county, Ohio; others are from Miami and Scioto valleys, Ohio; Kanawha valley; and southeastern and southwestern Arkansas.
Two exceptional forms, which may be considered modifications of the triangular, come from eastern Tennessee and western North Carolina. The first, which is pentagonal, is shown in [figure 201]; the second, a medium between a perforator and a deeply serrated, triangular arrowpoint, is shown in [figure 202].
