EXPLANATION OF THE [ILLUSTRATION 
Prare XLV. Typical ears of Chapalote, a primitive 
race of pop corn found today in the states of Sina- 
loa and Sonora in northwestern Mexico. The ears 
are small, cigar-shaped and bear small flinty ker- 
nels with brown pericarp color. The majority of 
archaeological cobs described in this paper are re- 
lated to this still-existing race. Scale 1 em.=1.17 
em. (From Wellhausen ef a/, 1952.) 
