The Salmon 



53 



About the middle of November they leave the pools and come on to 

 the streams. Here they select a bank composed of sand and gravel 



3- 



<U 



O 



to 



0) 

 4= 



t/J 



C 



B 



'5 



C 

 O 



O 



S 



"5 



C/3 



a 



C 



which is not very liable to shift throughout the season. Here the 

 female digs into the gravel with her tail (Fig. 44), turns on her side, 



