SMITHSONIAN ARCHAEOLOGICAL COLLECTION. 



9 



arm their arrows with stone points of different forms, the shape of the arrow 

 head being with them merely a matter of individual taste or of convenience. 

 It is here only intended to present the characteristic types of these weapons. 

 Yet any such arrangement must be arbitrary to a great extent, owing to the 

 many intermediate forms in which the distinguishing peculiarities are wanting, 

 and the same difficulty is met in the classification of stone articles in general, 

 may they be chipped or ground. 



AIUJOW-HEAUH (. 



a. Leaf-shaped, base pointed or rounded (Fig- 4, gray semi-opal, California). 



Those with a pointed base imperceptibly pass over into the lozenge form, 

 which is not very frequently met. 



b. Convex-sided with truncated base (Fig. 5, transparent obsidian, Mexico). 



Specimens of this description often approach the triangular shape. 



c. Triangular, forming an equilateral or isosceles triangle (Fig. G, gray jasper, 



New York). Perfectly triangular arrow-points are less frequent than 

 those of the following class. 



d. Straight-sided with more or less concave base. In some the concavity 



assumes the character of a deep indentation by which barbs are produced 



