of the Salmon in Fresh Water. 



101 



The livers of the two exceptional fish 72 and 79 from the mouth of 

 the river in November yielded the following amounts of fat : 

 72 Per Cent, 12-56. Per Standard Fish, 2M. 



79 5-76. 10-2. 



These figures show that the fats stored in the liver while the fish is 

 feeding in the sea are to a great extent lost during the sojourn in fresh 

 water. As much as 20 grin, of fat per fish of standard length may he 

 given off from the liver. 



FEMALE SALMON, 1895. 



Table IX. gives the analyses of fats in the North Esk salmon of 1895. 



It agrees with Table II. except as regards the ovaries. A greater 

 percentage and actual amount of fat is present in these North Esk fish 

 in July than in the 1896 fish of the same month : 



TABLE IX. 



* Analysis lost. Average from others. 



MALE FISH. 



In the male salmon the testes are comparatively poor in fats. For 

 their development there is no need of the same storage of fats as in the 

 case of the growth of the ovaries. It is thus a matter of very consider- 

 able interest to ascertain whether in the male fish the same accumulation 

 of fat in the muscle occurs as in the female, and whether this fat is used 

 up to the same extent. 



Table X. gives the results of the analyses of the fat in male fash 

 during 1896: 



[TABLK. 



