Six fragments of a type similar to the modern race 
Cristalino de Chihuahua. Ten- to twelve-rowed; long 
glumes; both upper and lower glumes thick and slightly 
indurated. 
Trench 3, Level 1 (0-6). One intact cob, 4.5 em. 
long, ten-rowed, highly ‘Tripsacoid. Rachis and glumes 
strongly indurated; a few single spikelets. 
Six fragments approaching Chapalote in type; five 
which approach Harinoso de Ocho, and three which are 
similar to those of Cristalino de Chihuahua. 
One kernel, broad, flinty and brown in color. 
Structures 1 and 2 (0-18). The intact cobs comprise 
two distinct groups. The first includes eight cobs of the 
type Cristalino de Chihuahua, which results from the 
blending of the characteristics of earlier elements—Chap- 
alote, Harinoso de Ocho, and teosinte. The cobs are 
medium to long, 10, 12, 13, 18, 14, 17.5 and 23 cm. re- 
spectively. They are predominantly ten- to twelve-rowed 
with long, thick glumes which are slightly indurated. 
The second group, comprising ten intact cobs, are all 
highly Tripsacoid. Lengths 6.5, 7.5, 8, 8.5, 8.5, 9, 9, 
9.5, 9.5, 1l em.; all have indurated glumes and rachises. 
In some specimens, the glumes are crateriform and 
highly indurated. There are no single spikelets; but in 
several of the specimens, the second, or pedicellate, spike- 
let is greatly reduced in size—a condition which repre- 
sents a transition between double and single spikelets, 
and one which is common in segregates of maize-teosinte 
hybrids. 
The cob fragments from this level, comprising 82 
specimens, fall into three more or less distinct groups. 
The largest number, thirteen, are similar to the intact 
cobs of Cristalino de Chihuahua mentioned above. The 
second group, comprising ten fragments, are slender and 
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