Prare XI. A. These cobs, of which there were 
only three, appeared in the San Lorenzo phase, 
A.D. 1050-1450. They are similar in their charac- 
teristics to those of the race Tuxpeno, one of the 
most productive of the modern races of Mexico, but 
they may be unusually large cobs of Breve de 
Padilla, the predominating race in the upper levels 
of the refuse. Actual size. B. These cobs may be of 
the race Harinoso de Ocho which is postulated to 
be the putative ancestor of Breve de Padilla, illus- 
trated in Plate X, and of several other productive 
races, 
