The kernels are thick, wedge-shaped and flinty; and, in 
these respects, resemble the kernels of Cristalino de Chi- 
huahua. There are no typical kernels of Chapalote, but 
the influence of this race is apparent in the brown peri- 
carp of a small percentage of the kernels. 
Olla Cave 
Trench 2, Level 1 (0-6"). No intact cobs: ten frag- 
ments which may be related to Chapalote; three frag- 
ments which show some resemblance to Harinoso de 
Ocho; one fragment resembling Cristalino de Chihua- 
hua; and three fragments of Tripsacoid cobs. Six kernels 
(two brown, one red, one yellow, and two white); one 
of the brown kernels is exactly like those of Chapalote; 
one of the white kernels is lke those of the modern 
Cristalino de Chihuahua. 
Trench 1, Level 1 (0-6). Two intact cobs, both 5 em. 
long, both Tripsacoid ; and an additional fragment which 
is ‘'ripsacoid. Of the remaining ten fragments, nine can 
be assigned to Chapalote and one to Harinoso de Ocho. 
Five kernels (two brown, one red, one yellow, one white): 
one brown kernel is typical of Chapalote. 
Tau Cave 
Trench 1 (0-18"). Two intact cobs, 6 and 10 cm. long. 
The first is a highly Tripsacoid cob with stiff, indurated 
crateriform glumes and indurated rachis. There is a slight 
tendency towards the suppression of one spikelet of the 
pair. The second cob has relatively long, soft glumes and 
is similar to Chapalote. Three cob fragments resemble 
Cristalino de Chihuahua, being large in diameter and 
possessing deep pockets, formed by long, thick, slightly 
indurated glumes. Seventy-two kernels, of which 63 are 
brown, one red, and eight white. ‘The brown kernels are 
