Noguchi Plate 20 

~~ lao 
D 
: Venom gland of Crotalus adamanteus. 
A. Longitudinal section. X 9. 
B. Cross-section, showing Tubular Raminous Structure. (Note abundant muscle-fibers 
running into the interacinous spaces.) X 100. 
C. Cross-section. X 9. 
D. Portion of Tubular Acinus, showing Columnar Epithelial Cells with Nuclei near Base 
of Cell Body. X 1000. 
