EXPLANATION OF THE ILLUSTRATION 
Prare XLVI. Typical ears of Harinoso de Ocho, 
a race of flour corn still found occasionally in the 
states of Sinaloa and Sonora in northwestern Mex- 
ico. This race is believed to have originated in 
South America and to have been introduced into 
Mexico prehistorically. Archaeological cobs re- 
sembling those of this race were found in four of 
the caves described in this paper. Scale | em, = 
1.25 em. (From Wellhausen e/ a/, 1952.) 
