NO. 10 SECOND REPORT ON FOLSOM COMPLEX ROBERTS 



23 



group frequently retain part of the siliceous crust of the nodule from 

 which the flake was struck. In contrast are those which display careful 

 workmanship not only of the edges but of the faces as well. The 

 scraping edges, regardless of the quality of the tools, are straight, 

 convex, or concave. Good examples of the concave form are illustrated 

 in figure 3. Several of the implements combine both straight and 

 convex, concave and convex, or all three types of edges. It is possible 

 to separate the side scrapers into a large number of subforms, but for 

 the purposes of this paper the general grouping just described is 

 sufficient. 



Fig. 3. — Side scrapers with concave cutting edges. (Actual size.) 



The " snub-nosed " scrapers are an interesting series and are per- 

 haps the most consistent in type of all the tools in this general 

 category (pi. 8). They comprise 26.6 percent of the scrapers. 

 Despite the fact that there are a number of subforms, the implements, 

 whether large or small, made from good stone or poor, show no 

 marked deviations from the main pattern. All are characterized by 

 one thick, rounded, convex, carefully chipped end. The treatment of 

 the other end, the edges, and the lateral faces varies. Some are un- 

 touched, on others the sides were chipped, others show the use of the 

 flaking tool on the lateral faces. Rarely was the bottom of the tool, 

 the ventral surface or side which came off the core, altered in any 

 way. The size range in this group is rather pronounced. They vary in 

 length from 21 to 50 mm, in breadth at the cutting edge from 18.5 to 

 40 mm, and in thickness from 4.5 to 12 mm. 



