128 



BUREAU OF AMEEICAN ETHNOLOGY 



[bull. 52 



were used unhafted. Certain others are grooved roughly or in neat 

 fashion and were probably not employed in the stone-shaping work. 

 They were hafted and, it may reasonably be assumed, served some 

 domestic purpose or on occasion for war and the chase. Examples 

 are presented in figs. 13, 14. 



Fig. 5. Bowlder hammer of felslte, with 

 battered ends, {i actual size.) Mira- 

 mar. 



Fig. 6. Hammer of felsite, with battered ends and 

 pitted sides. (J actual size.) Necochea. 



Associated with the hammers and anvils scattered liberally over 

 the surface of the sites near the beach, as described by Doctor 

 Hrdlicka, are the fractured pebbles and the implements and flakage 

 made or derived from them. 



Fig. 7. Hammerof quartzite, with pitted facesand battered Fig. 8. Hammerofquartzite, with deep- 

 end and sides, (i actual size.) Campo Peralta. ]y scarred and pitted faces, (factual 



size.) Mar del Plata. 



The processes employed in fracturing the pebbles have been quite 

 simple. It appears that although the free-hand stroke may have 

 been in common use for other kinds of stone-shaping work, as indi- 

 cated by the occurrence of hammers of the type commonly employed 

 in free-hand flaking and pecking (figs. 10-12), the pebbles, held usu- 

 ally between the fingers and thumb of one hand, were set one end 



