DECENNIAL PUBLICATIONS, X 



PLATE XXI 



te 



->/*!-; 



,,-.!, -4: : ?v. 



*'.-,. 



Serous acinus 



~ *' 



Proximal zon 

 of coll contain- 

 ing deeply 

 stained 

 prozymogen 



TJistal zone of 

 cell containing 

 a few granules 

 of zymogen 



Fio. (5 



FIG. 7 



(iranules of 

 zymogen fill- 

 ing the distal 

 zone of the 

 scrims cell 



L. H WILDER 



Fio. S 



