978 The American Naturalist. [November, 
involving the production of “quarry rejects” of leaf-shaped 
form. And it seems hard to escape the conclusion that if 
in some American cases the finished arrow-head or small 
blade is the fit survivor of a family of leaf-shaped “ rejects;” in 
others (as certainly in the Mexican flake arrow, worked only 
on one side), it sprung from the nearest available chip, no 
more resembling the ovate quarry forms and Trenton speci- 
mens than would a bit of ill-worked bottle glass cast aside by 
California Indians. 
FIG. 9. 3 
Rude hafted flakes of obsidian from Easter Isl 
(Photographed by the kind permission of Mr. mme H. Read, British Museum). 
