This suggests that some of the ears were consumed in 
the green or roasting stage. 
Tonro MAIzE 
This lot of 1902 cobs was obtained from three areas. 
The majority (seventy-nine percent), however, came 
from a single location (Room 16). The material may 
therefore be considered as a unit (Table II). Analysis 
was restricted to a representative sample of 500 cobs 
(twenty-six percent of the total), which included all in- 
tact specimens (162 cobs). The cobs are relatively uniform 
and many are broken. Increased breakage in the Tonto 
cobs (ninety-one percent as compared to seventy percent 
for Richards’ Caves) may be attributed toa significantly 
lower level of teosinte introgression (Table V1). 
Kernel-row Number. WKernel-row number in non- 
fasciated cobs decreases significantly with increasing 
levels of introgression. In contrast to this, the row- 
number of fasciated cobs appears to be independent of 
introgression, or at least the relationship is complicated 
by other factors (Table 7 and Fig. 4). Fasciation is more 
common at Tonto (twenty-five percent as compared to 
fourteen percent for Richards’ Caves) and is associated 
with pure maize (twenty-eight percent fasciation at 
grade-2; twenty-five percent at grade-3; and eleven per- 
cent at grade-4). At the average row-number of ten, 
fasciation prevails in twenty-three percent of the cobs (a 
frequency twice as high as in the ten-rowed cobs from 
Richards’ Caves, and many times that which is charac- 
teristic of most modern races). 
Diameter. 'Tonto cobs are slender, averaging only 16.5 
mm. in diameter (2 mm. less than in Richards’ Caves). 
Teosinte introgression increases the diameter of these 
cobs (Table VII and Fig. 5). 
[ 112 ] 
