EXPLANATION OF THE [ILLUSTRATION 
Piare VII 
A. Fossil © 7'ripsacum*’’ (Mexico City Belles Artes Core, depth 74 
meters ) 
B. Fossil “‘maize’’ (Mexico City Belles Artes Core, depth 70 meters) 
C. Fossil ‘‘maize’’ (New Mexico, Bat Cave, level VI, age ca. 5000 
years ago 
D. Fossil ‘maize’? (Guatemala, Lake Petenxil, age 3950+ years ago. 
Explanation 
A. Compare with Tripsacum dactyloides, Plate II] (A). 
B. Primitive maize pattern, compare with Nal Tel (a relatively pure 
type), Plate III(B). Both specimens A and B are in slightly eroded 
condition due to post-depositional processes. 
C. 
The specimen had a maize pattern with good contrast, but with 
some clumping of spinules. 
D. 
The specimen is like C, but with slightly greater clumping. 
