BUREAU OF AMERICAN ETHNOLOGY 



BULLETIN 52 PLATE 10 



ANVIL-STONES 



a, On grassy surface (apparently in situ) at Campo Peralta, south of Mar del Plata. 



6, On denuded surface, near the sea, in vicinity of Arroyo Corrientes. Here is seen also refuse of 



pebble-stone flaking, with numerous unused'pebbles, "bones of seals, shells, and other objects. 

 c, A small collection from an area of lejs than an acre on an elevation just north of Arroyo Corrientes. 



