of the Fisher ij Board for Scotland, 



167 



cause of death, which was possibly due to the variations in the tempera- 

 ture of the water, but one of them, 202mm. in length, which should have 

 weighed about 67 grammes, weighed only 63*8 grammes. 



Tank III. 



The particulars in regard to the whiting show that the increment in the 

 first period varied from 9mm. to 24mm., but the fish showing the small 

 increase and another showing an increase of only 11m., were found to 

 have the tail badly ulcerated and they were killed. Omitting these two, 

 the mean increase was 21-3mm., or an average per ten days of 2-13mm. 

 as compared with 16mm. and 17"7mm. in the cold tanks. In the second 

 period the increase was on an average 13"7mm., and therefore under the 

 average for the cold water tanks in the same period, which shows, as well 



