BUREAU 0^ ETHNOLOGY 



BULL. U _21, PL. IV 



PROGRESSIVE SERIES OF REJECTS AND Hf^UQ^ Qp ^^^^_ ADVANCED FORMS. 

 The first and second lines illustrate a progressive series of rejects beginning with t e ^* "Material at A and ending with a well-developed blade, R. The third line is a series of 

 rejects indicating the range of blade outlines so far as represented in the qu y refugg Figure 1 is shown full size in plate V. About one-fifth actual size. 



