106 BUREAU OF AMERICAN ETHNOLOGY [Bull. 189 



are made from quartzite (7), variously colored cherts (14), Badlands 

 chalcedony (6), and agate and petrified wood (2). 



Triangular hlade^ straight base, unnotched (75 specimens). — These 

 points have straight to somewhat irregular bases, with gently convex 

 blade edges. They range in length from 20 to 58 mm,, although 80 

 percent of them are less than 40 mm. long. Width is 12 to 26 mm., with 

 a mean of about 19 mm. Thickness ranges between 3 and 6 mm. The 

 smallest point has a weight of 0.4 gram, and the largest weighs 16 

 grams, but only 5 points exceed 2 grams in weight (fig. 17, a-d). 



Triangular blade, straight base, two side notches (27 specimens). — 

 These points have fairly straight, regular bases, with straight to gently 

 convex blade edges. They range in length from 20 to 41 mm., al- 

 though 80 percent of them are less than 31 mm. long. Width is 10 to 

 18 mm., with a mean of about 14 mm. Thickness is from 2 to 6 mm. 

 The smallest point has a weight of 0.6 gram, and the largest of them 

 weighs 2.3 grams, most of them averaging about 1 gram (fig. 17, 

 e-h). 



Triangular blade, concave base, two side notches (15 specimens). — 

 These points have even, concave bases, with straight to gently convex 

 blade edges. Length ranges from 21 to 44 mm., although 80 percent 

 of them are less than 33 mm. long. Width is from 12 to 18 mm., with 

 a mean of about 14 mm. They are 3 to 7 mm. thick. The smallest 

 point has a weight of 0.7 gram ; the largest weighs 3.0 grams, but only 

 one of them exceeds 1.6 grams in weight (fig. 17, ir-T) . 



Point fragments (13 specimens). — These fragmentary points con- 

 sist of the tips of points wliich have been broken through side notches ; 

 the form of the base is indeterminate. 



End scrapers (226 specimens) : 



The outlines of these specimens tend to be triangular to rectangular, 

 although many of them are irregnilar in form. The working edge, on 

 the end opposite the bulb of percussion, is generally steeply flaked. 

 Most of them bear large flake scars on the convex upper surfaces (fig. 

 19, d-g), but a few of them are flaked on the upper surface (fig. 19, 

 c, h) . The smallest scraper measures 18X19X6 mm., with the largest 

 of them measuring 76 X 46 X 15 mm. ; the average is about 40 X 24 X 10 

 mm. (fig. 19, c-h). 



Expanding base drills (4 specimens) : 



One complete specimen, made of petrified wood, has a short, tri- 

 angular point on one side of a leaf-shaped flake. The specimen is 

 unifacially flaked; it is 32 mm. wide and 29 mm. long (fig. 19, a). 

 The other three specimens have nearly parallel-sided shafts which are 

 broken off a few millimeters from the base (fig. 19, b). Bases are 18 

 to 32 mm. wide, and the shafts suggest lengths originally in excess of 



