The groups and subdivisions which have been recognized among the smaller chipped flint objects in the Bureau collection may be enumerated as follows:
A. Concave base. The concavity may vary from almost a straight line to one-third the length of the flint. Usually symmetric, as in figures 190 and 191, though sometimes one tang or barb, if it may be called such, is longer than the other, as in [figure 192]. A very few have beveled or serrated edges.
1. Convex edges. The type, shown in [figure 190], is from Jefferson county, Tennessee. Other specimens are from eastern Tennessee; Union county, Mississippi; northwestern Georgia, and Bibb county and Savannah in the same state; central and western North Carolina; Miami and Scioto valleys and central Ohio; Kanawha valley, West Virginia; South Carolina; and southwestern Arkansas.
Fig. 192.—Chipped flint, asymmetric.
Fig. 193.—Chipped flint, concave edges.
2. Straight edges, as in the specimen illustrated in [figure 191], from Ouachita county, Arkansas. Similar specimens are found in northeastern and southwestern Arkansas; western and central North Carolina; Kanawha valley; eastern Wisconsin; northwestern Georgia, and Savannah; eastern Tennessee; South Carolina; southwestern Illinois; Union county, Mississippi; and northeastern Kentucky.
3. Concave edges. This abundant form is illustrated in figures 192 (Cherokee county, Georgia), 193 (Caldwell county, North Carolina), and 194 (Washington county, Virginia). Other specimens are from northwestern Georgia and Savannah; central and western North Carolina; Kanawha valley; eastern Tennessee; northeastern Kentucky; southwestern Arkansas; South Carolina; Union county, Mississippi; and Coosa valley, Alabama. This subdivision of group A is abundant, as well as widely distributed.
