338 THE ANGLER-NATUEALIST. 



upper rows extending along the vomer. Origin of back-fin halfway 

 between point of nose and commencement of upper tail-fin rays j third 

 ray of back-fin longest, and equal to length of base of fin; small 

 back-fin halfway between last ray of large back-fin and end of tail- 

 fin, and directly over origin of last ray of anal fin. Fins generally 

 rather small and muscular. Colours when in season : upper parts and 

 back-fin deep purplish brown, changing into reddish grey, and thence 

 into fine orange on breast and belly ; whole body when fresh out of 

 water as if glazed over with a tint of rich lake-colour. Gill-covers 

 and back-fin marked with large dark spots, and whole body covered 

 with markings of different sizes and varying in number in different in- 

 dividuals, being sometimes scattered and of large size, and at others 

 thickly set and of small dimensions. Each spot surrounded by a paler 

 ring occasionally of a reddish hue. Spots becoming more scattered 

 below lateral line ; none on belly. (See also p. 314 for comparison of 

 spots in this fish and in the Common and Lochleven Trout.) Pectoral, 

 ventral, and anal fins yellowish green, darker towards the extremities. 

 Tail of great breadth and power broader than greatest depth of 

 body (see also p. 315), slightly forked when young, becoming square 

 with age ; in very old fish slightly convex. Pyloric cseca from 34 to 

 49 in number. Scales thin and flexible, different in form from those 

 of the Trout, and more circular than those of any of the migratory 

 species. 



Fin-rays in specimen j 



from Loch Awe : } *>. 13 : P. 14: V. 9: A. 11: C. 19. 



In specimens from Lough Neagh, one ray less in D., P., & A. fins, and 

 one ray more in C. fin. 



