PEEFOBATED PEBBLES FEOM CALIFOBNIA. 183 



macher. It is now in the Smithsonian collection, and is represented on 

 Plate X, Fig. 35. 



Another specimen closely resembling the last, but not over an inch 

 thick, is shown by Fig. 31 of the plate. This was found on the island of 

 San Nicholas by Mr. Schumacher (P. M. 9350) 



Two others in the Peabody Museum (13521, 13524) are of the same 

 character as the last, but somewhat larger, being 3£ and 4 inches in diame- 

 ter. These were collected on the island of San Clemente by Mr. Schu- 

 macher. 



Fig. 27 of the plate represents another perforated oval pebble from San 

 Nicholas Island, also obtained by Mr. Schumacher (P. M. 9355). 



A perforated pebble from Santa Rosa Island was obtained by Mr. 

 Bowers (P. M. 13809). This is 1J inches thick and 3 inches in diameter. 

 Another, still smaller, was received from Mr. Schumacher, and came from 

 the island of San Clemente. It is 1 inch thick and 2£ inches in diameter 

 (P. M. 13523). 



A pebble somewhat triangular in shape, 1^ inches thick and 4 J inches 

 in its longest diameter, has a large and evenly pecked hole through its 

 centre. This hole is 1J inches across its narrowest part and widens to 2 

 inches at each face of the stone. This sinker, as I am inclined to regard it, 

 is represented of J its diameter on Plate X, Fig. 32. It was found on San 

 Nicholas Island by Mr. Schumacher, and is now in the Peabody Museum 

 (9349). 



Another rather irregularly-shaped specimen is shown by Fig. 30 of the 

 plate. As will be seen by the figure, this stone has a five-sided outline, 

 which is probably in part the natural shape of the pebble. It is a little less 

 than 4 inches in diameter, and not over f of an inch in thickness. This 

 may be a sinker. It is from the island of San Nicholas, and is in the Pea- 

 body Museum (9356). 



I have now to notice twenty or more of these flattened stones, which 

 differ from the others in their mineralogical character and in the shape 

 of their perforations. These are of steatite, serpentine, and allied min- 

 erals, with one exception, which is apparently made of a very soft clay- 

 stone. They are all smooth, and several are polished. In most, the hole is 



