453 



Fig. 8. 



Fig. 9. 



z. ep. 



2. ep. .-.._ 



ft. 



Fig. 8. Pancreas (estuary salmon), 

 showing its distribution in the fat lying 

 between the pyloric appendages. Hsema- 

 toxylin and eosin. 



Fig. 9. Pancreas (trout), showing 

 an acinus in the "resting" stage, with the 

 cells full of zymogen granules. Iron-hsema- 

 toxylin. 



Fig. 10. Pancreas (trout), showing 

 an acinus in the "active" stage, when most 

 of the granules have been discharged. Iron- 

 hsematoxylin. 



c.t.f. 



■■ c. t.f. 



"•c. t.n. 



Fig. 10. 



z.g. 



Av 



C. t.f. 



A^-r. 





where I found the cells completely full of granules was that of a trout 

 which had been preserved immediately after death. All the other 

 trout and all the Berwick salmon showed the cells more or less emp- 

 tied of granules. The pancreas was not often present in the portions 

 of salmon from the rivers fixed for examination, but where it was to 

 be seen the cells were generally shrunken and shrivelled, and con- 

 tained no granules. 



The Liver. 



Comparatively few livers were examined, and these showed no very 



marked difference beyond the presence or absence of fat. Generally 



speaking, however, it was found that the livers of the salmon taken 



at the river mouths contained much fat (Fig, 12), while those of the 



