88 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



NBai (3), NBa2 (3), NBa3 (i), NBc (9) and a doubtful broken 

 example of SCai (i). Although these six specific types are present, 

 the arrowpoints according to size as well as form fall into two main 

 divisions : a small, delicately chipped NB type, usually with from two 

 to five notches (NBai-3) (pi. 7, fig. i, c) and a larger heavy point of 



Not 

 Stemmed 



CLASSIFICATION CHART FOR CHIPPED POINTS 



D. Straight-sided E. Ovoid A. Coniracting Stem B. Parallel -sided 



Stemmed stem 



C. Expanding Stem 



Fig. 7. — Form classification for chipped points (see table 2). 



either NBa or NBc type (pi. 7, fig. i, j, m). A typical specimen of the 

 small, delicate type measures 25 mm in length and 15 mm in breadth 

 at the bast. A typical point of the second unnotched type is 46 mm 

 long by 33 mm wide at the base. Since the two types each vary some- 

 what in size there is a certain amount of blending. However, the dis- 

 tinction is generally clear ])et\veen the heavier, unnotched triangular 



