THE BULL TROUT 67 



silvery coating, and elegance of form of the parr 

 (young salmon) than any of the others. Those 

 produced between the salmon and common trout 

 {Salmo Fario), and between the common trout 

 and salmon trout, have in every respect more the 

 appearance of the common trout than the former." 

 Some have imagined that the whitling or hiding 

 are the young of the bull trout. But this is a 

 mistake, as the hirling abounds in the Annan, 

 where the bull trout is very rarely seen ; and also in 

 the Nith, where Mr. Shaw has never been able to 

 discover one of the other species. Lord Home 

 likewise, whom I consider the very best practical 

 authority, says, " The whitling of the Tweed is the 

 salmon trout, and not the young bull trout, which 

 now goes by the name of trout simply." 



THE GREY, BULL TROUT, on ROUND 



TAIL 



Salmo Eeiox, Linn. 



"The grey trout," says Mr. Yarrell, "is dis- 

 tinguished from the salmon and salmon trout by 

 several specific peculiarities. The gill-cover differs 

 from them decidedly in form, and the teeth are 

 longer and stronger." The tail grows square at an 

 earlier period than in the salmon ; and the central 

 caudal rays continuing to elongate with age, the 

 whole tail, originally concave, eventually becomes 

 convex, and from thence it has been called the 

 round tail. The elongation of the under jaw is 

 peculiar to the males only, and is less than in the 

 salmon. The scales also are less, the shoulders 



