corn of some of the Southwestern Indians. We have 
found counterparts of it in both Zuni and Navaho maize. 
Some of the cobs of Cristalino de Chihuahua have a 
very definite ‘‘honeycomb”’ aspect, which results from 
the deep pockets formed by the upper and lower glumes. 
This represents a combination of characteristics provided 
by the three separate elements which have gone into this 
maize. Chapalote has contributed long glumes; as al- 
ready mentioned, it is known to have an allele at the 
tunicate locus. Harinoso de Ocho has contributed thick- 
ness to the glumes; and introgression from teosinte has 
caused the glumes to be slightly indurated. By crossing 
segregates from maize-teosinte hybrids with a stock 
carrying the gene for half tunicate, we have produced 
specimens of modern maize which duplicate these cobs 
very closely. These deep pockets on the cob are charac- 
teristic also of some of the maize of the Indians of the 
Southwest. 
DETAILED DESCRIPTIONS 
The specimens from the several caves are described in 
detail below: 
Swallow Cave 
Trench 3, Level 14 (78-84"). Fragments of a carbon- 
ized cob, containing the same type of cupules that are 
found in the intact cob from Level 18. The cupules are 
about as broad as long, the upper margin being slightly 
indented at the center, giving the cupule a broad, heart- 
shaped appearance. here is an indication that the cu- 
pules are widely spaced; their surface is hairy. These 
fragments probably represent cobs of Pre-Chapalote. 
Trench 3, Level 13 (72-78"). One intact cob carbon- 
ized, slightly flattened, 3.5 em. long, with twelve rows, 
nine kernels per row. Shape of cob similar to those of 
earliest Bat Cave corn. Other similarities : cupules widely 
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