54 BULLETIN 1S3, UNITED STATES NATIONAL aiUSEUAI 



at the base and pointed at the opposite end. The cross section varies 

 from thin lenticular to thick diamond-shaped; chipping is relatively 

 coarse. The tip in most cases shows a gloss derived from use. With 

 minor variants, the type is shown in plate 14, /, h. There is a single 

 specimen with blunt point in which a short straight shaft expands to 

 a wide base (pi. 14, ?*). A thick lozenge-shaped drillpoint, 73 mm. 

 long, has one end rounded, the other tapered and broken off. Two 

 other specimens appear to have been made by retouching arrow- 

 points. Both are stemmed. In one the sides curve out slightly from 

 the shoulders and then converge to a fracture where a narrow tip of 

 unknown length has been broken off (pi. 14, j). In the second, the 

 sides converge unevenly to a broad relatively heavy tip, blunted by 

 use (pi. 14, k). Whether these represent standard types for the site 

 or are merely readapted projectile point fragments I do not know. 

 The type of drill in which these several points were used by the 

 natives is conjectural. 



An interesting group of chipped objects is found in the disks and 

 cones, representative examples of which are shown in plate 15. There 

 are 24 of these, including most of the pink, gray, and brown cherts 

 which abound on the site. In general they are characterized by a sub- 

 circular to slightly elongate-rounded outline ; one surface is plane or 

 nearly so, while the other is rather markedly convex, ridged, or pointed 

 (subconical). Sixteen have the bottoms (i. e., plane surface) nearly 

 or quite flat representing the cleavage plane; in the remainder this 

 surface has been chipped. In cross section, however, all are asym- 

 metrical when viewed in the plane of greatest diameter. The smallest 

 (pi. 15, a) is 37 mm. in diameter and 11 mm. thick, whence they range 

 upward in size to a maximum diameter of 63 mm. and a maximum 

 thickness of 37 mm. (pi. 15, d). Some of the thicker conical speci- 

 mens have long narrow flake scars extending from the apex to the 

 edge on about half the upper surface, but others show no such careful 

 control of the j)rimary flaking. A few^ of these objects might have 

 been used as scrapers (e. g., 6, e in pi. 15). As a rule, however, the 

 edges do not show the effects of such service, as do the scrapers de- 

 scribed elsewhere. I do not know whether all are finished artifacts, 

 or whether some are possibly reject cores from the manufacture of 

 flake knives. From their relative abundance and the fact that they 

 seem to have been shaped with some care, I prefer to regard them as 

 specialized artifacts whose function is at present uncertain. So far as 

 I am aware they have not been reported, or at any rate described as 

 a class, from other sites on the Missouri or in the eastern plains. 



Flake knives to the number of 36 were recovered. Complete speci- 

 mens vary from about 40 to SO mm. in length ; the width rarely exceeds 

 25 mm. (pi. 14, a-e). One surface invariably consists of the smooth, 

 slightly curving cleavage plane ; the other has 2 to 5 long narrow flake 



