Fig. 14.— Diagram ronirasting heads of female Salmon and Sea-trout, 

 (i) Head of female salmon. 

 (2) Head of female sea-trout. 



f^'PT- '5- — ^Diagram of gill-covers of Salmon-Trout, Grev Trout, and Salmon. 



{after Yarrell^ reversed). 



See pages 55 and 56. 



