PLATE 2 



EXPLANATION OF FIGURES 



4 A part of the typical islet, b, b-type of cell; c, c-type; e, e-type; be, blood- 

 capillary; A, acinus cell. Fixed in 4 per cent formaldehyde and stained with 

 iron-hematoxylin. X 1 100. 



5 A part of the typical islet, e, c-type of cell; be, blood-capillary; A, acinus 

 cell. Fixed and stained according to Ciaccio's method for lipoid proper ('11). 

 XllOO. 



6 A part of tj'pical islet, e, c-type of cell; be, blood-capillary; A, acinus cell; 

 Treated according to Cajal's uranic nitrate-silver method for the Golgi's net. 

 XllOO. 



7 A non-typical islet; a group of islet cells at the end of an acinus, where 

 they have not yet their definitive shape and arrangement, the contact line of 

 the opposite acinus cells being in direct continuity with that of the opposite acinus 

 cells. 7, islet cell (e-type); A, acinus cell. Fixation: sublimate-osmic acid; 

 staining: iron-hematoxylin. XllOO. 



