List of Illustrations. 



Plate I. A Sea-Trout (in Colour) Frontispiece 



Face page 



„ II. Development of the Salmon from the Egg to the Smolt 



Stage (in Colour) 72 



„ III. Development of the Sea-Trout from the Egg to the Smolt 



Stage (in Colour) 76 



„ IV. A Trout, a Loch Leven Trout, a Sea-Trout, and a Salmon 



i ,, £is "Yearlings" (in Colour) 92 



„ V. A Trout, a Loch Leven Trout, a Sea-Trout, and a Salmon 



as " Two Year Olds " (in Colour) - - - - 94 



,, VI. A Silvery Loch Lomond Trout (in Colour) - - - 100 



„ VII. A Young Salmon assuming the Smolt Dress (in Colour) loi 



„ VIII. An Exceptionally Large Sea-Trout Smolt (in Colour) - 104 



„ IX. A Spawning Male Sea-Trout (in Colour) - - " 159 



" Fresh Run from the Sea " Face page 40 



FIG. 



I. A Salmon, showing normal spots of the " maiden " fish - - 42 



A Salmon, showing speckled appearance of a fish which has 



previously spawned • \2 



Two Loch Lomond Sea-trout, showing typically distinctive 



markings 44 



A male Sea-trout at spawning time ------ 44 



A "two year old" Trout (fario) with "halo" surrounding the 



spots strongly accentuated 46 



Two " two year old " Trout (fario) showing normal markings - 46 



A Norwegian river Trout (fario) - 47 



A Clyde river Trout (fario) 47 



A Loch Lomond Trout (/arfo) showing spots geometrically arranged 48 



A Loch Lomond Sea-trout showing spots geometrically arranged 48 

 Diagram showing arrangement of the fins of Salmon, Sea-trout 



and Trout ca 



12. Diagram contrasting tails of Salmon and Sea-trout - - - SS 



13. Diagram contrasting heads of male Salmon and Sea-trout - - eg 



ix 



4 



5 



6 



?■ 

 8 



9 

 10 

 1 1 



