Fig 6 Section of gland near its origin from the duct, showing several types of 

 epithelial cells. Acetic osmic bichromate, safranin, acid violet; i, islet cells; 

 m, mucous cells; g, goblet cell; d, undifferentiated epithelium. _ 



Fig. 7 Duct frompancreas of the guinea pig showing multiple connections with 



islets. Pyronin, neutral red. X 77. 



350 



