COLUMBIAN HISTORICAL EXPOSITION AT MADRID. 373 



easily run into the shapes from Uruguay (Nos. 37 and 42), northwest 

 coast (No. 50), United States of Colombia (Nos. 59 and 60), and Mexico 

 (Nos. 79 and 84). 



No. 89, the double-pointed arrowhead from Mexico, is unique, as is the 

 double-based one, No. 10, and the curious No. 19 from North Carolina; 

 so is the eccentric unsymrnetrical No. 26 of white hornstone from Santa 

 Barbara, Cal. 



The saw-edged arrowhead in the United States series (Nos. 1 and 25) 

 occurs in Mexico in Nos. 76 and 77, but there is nothing anywhere shown 



CHIPS OF OBSIDIAN, WOBKED ONLY AT THE BASE AND MOUNTED AS BLADES, by the HOW extinct natives 



of Easter Island. (British Museum.) 



( By the kind permission of Mr. Charles H. Read. ) 



like the Mexican form of obsidian (No. 92), of which the only point spe 

 cialized is the base, the rest being left to the chance of natural cleavage, 

 however unsym metrical, and while we wonder that arrowheads and 

 knives were not more often made in this way, and ask whether future 

 research will not prove the pattern to have been one of the primitive 

 and original forms of the arrowhead, we must rest content to compare 

 it with the larger shapes of obsidian, sometimes 8 inches in breadth, 

 but of the same unspecialized character, made and used by the Easter 

 Islanders. (See two mounted specimens, fig. 6, from the British Museum.) 1 



1 Compare National Museum Report for 1889, article by W. J. Thomson. 



