REPORT OF COMMISSIONERS OF INLAND FISHERIES. 241 



for experimentation, for so small a number distributed over three 

 areas could be taken in at a glance, and furthermore twenty seemed 

 a sufficient number to give representative results. In the following 

 account are recorded experiments carried on with the first five stages. 

 All the conditions of light and backgrounds were not brought to bear 

 upon all five stages, and only a sufficient number of reports are here 

 recorded to show the general drift of the results. 



Experiment I. 



Experiment III. 



Conditions: White Background; Sunlight Bright; 

 20 First Stage Larvce. 



Test. Light end. Mid-area. Dark end. Cover. 



1 22 4 4 



2 18 7 5 Reversed. 



3 20 7 3 



30 



