HEDLiiJKA] STONE INDUSTRIES OF THE ARGENTINE COAST 151 



San Bias. They represent bowls and cups of simple shape, not in any 

 case exceeding 8 inches in diameter. The walls are thin, between 

 one-fourth and three-eighths of an inch in thickness, and are of well- 

 baked clay, gray and brown in color, and tempered with a large 

 percentage of quartz sand. The surfaces inside and out have been 

 well smoothed with a polishing implement. The rims are upright, 

 or curved shghtly inward or outward, and rounded or squared off on 

 the margin. 



Simple decorative designs have been added, in some cases encircling 

 the rim, and again covering a large part of the body. These designs 

 have been incised and indented with implements of varied shape, and 

 display considerable taste on the part of the potter, as will be seen by 

 referring to plate 15. Small fragments of similar, entirely plain ware 

 were collected on the margin of Laguna de los Padres, near Mar del 

 Plata, and also among the dunes and in the play as near the coast. In 

 the grade of culture represented this ware corresponds closely with 

 that of the stone implements and utensils of the same region. It 

 differs but slightly in composition, color, and decoration from the 

 simpler ware of the Atlantic slope in the United States. 



