EXPLANATION OF PLATE IV, 



Globular mortar, with cylindrical pestle, found in 1861, with other 

 stone relics and the bones of fossil mammals in auriferous gravel, about 

 16 feet beneath the surface at Kincaid Flat, Tuolumne County, Cal. 

 The shape of the mortar is symmetrical, and the surface well smoothed 

 by pecking and use. Diameter, 10 inches; height, 7i inches; depth 

 of basin, 5i inches. Material, pinkish hornblende andesite. Referred 

 to by Whitney, p. 263. No. 1), Voy collection. 



The pestle has enlargements at both ends and is not quite symmetri- 

 cal in shape, and the surface shows the marks of the shaping tool quite 

 distinctly, save at the ends, which are worn by use. Length, 11 inches; 

 diameter of middle portion, 1^ inches; of larger end, 2 inches. 

 430 



