Noguchi 



Plate 20 











D 



Venom gland ol 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. 



