284. BUREAU OF AMERICAN ETHNOLOGY [BuLu. 185 
Serapers: 409 specimens—Continued 
Group 3: 51 specimens. Similar to Group 2 except that the upper surface 
has been flattened by removal of one or more large flakes. The flake 
scars usually extend the entire length of the scraper. There is usually 
fine pressure-flaking along three edges (pl. 54, m, n, 0). 
Length, mm. Width,mm. Thickness, mm. 
Range: 24-107 16-40 5-13 
Median: 45 24 7 
Group 4: 21 specimens. Medium-sized, irregular-shaped flakes showing fine 
pressure-flaking along two edges, but each edge has been worked from 
the opposite face. Made of chert and jasper. 
Length, mm. Width,mm. Thickness, mm. 
Range: 33-53 23-49 3-9 
Group 5: 75 specimens. Flakes of irregular shapes that have been converted 
for use by the removal of fine chips along one edge. These tools appear 
to have been fashioned from discarded flakes. 
Length, mm. Width,mm. Thickness, mm. 
Range: 25-103 14-56 2-16 
Group 6: 93 specimens. Irregular-shaped pieces that show fine pressure- 
flaking along the greater part of their perimeter. Made of chert and 
jasper. 
Length,mm. Width,mm. Thickness, mm. 
Range: 16-85 19-53 3-16 
Group 7: 1 specimen. A large jasper flake, planoconvex in cross section and 
rectangular inform. There is fine pressure-flaking along the edges of one 
long side and one end. Crude percussion-flaking is present along the 
opposite sides. Large flake scars exist on the convex face. Corners are 
slightly rounded (pl. 53, f). 
Length, mm. Width, mm. Thickness, mm. 
130 68 29 
Choppers: 11 specimens: 3 complete pieces and 8 fragments. One specimen is 
ovoid in form; 103 mm. long, 81 mm. wide, and 24 mm. thick. Large flakes 
have been removed from both faces, and there is smaller and more carefully 
placed flaking along the edges (pl. 53, 7). The 2 other choppers are complete 
except that a small portion of 1 has been broken off. These are more tri- 
anguloid in shape. They are chipped in a manner similar to the specimens 
described above (pl. 53, 7). 
Length, mm. Width, mm. Thickness, mm, 
IPA 79 De 
102 47 25 
The remainder of this group consists of chert and jasper fragments with 
large crude flake scars on the faces and smaller, more precise chipping along 
the edges. 
Length, mm. Width, mm. Thickness, mm. 
Range: 66-1385 44-85 16-27 
Chipped celts: 2 specimens. Large flakes have been removed from both faces. 
Chipping is finer and more precise along the edges. Each has converging 
sides and convex edges. One end on each of the specimens is more pointed 
