158 SALMON AND TROUT. 



To the above it may be added, that in the salmon the pectoral fin aqua's 

 two-thirds of length of head, whilst in the bull trout it equals little more than 

 half— the anal fin also in the former commencing about half-way between origin 

 of ventral fins and origin of lower tail fin rays, and in the latter nearer to the 

 tail. Lastly the fins of the bull trout are more muscular and larger in propor- 

 tion to the rest of its body than those in either of the other species. 



In regard to colouring, the bull trout is thickly spotted with 

 brown over the back and sides both above and below the 

 lateral line, and even to the tip of the dorsal fin, which in 

 the salmon is seldom or ever marked with more than a few 

 ' splotches,' and those close to the base of the fin. 



In the sea trout the dorsal fin is generally spotted like that 

 of the bull trout though not quite so thickly. 



A comparison between the characteristics given of the 

 salmon, bull trout, and sea trout, with those of the non-migra- 

 tory division — the common or brown trout, the great lake 

 trout and the charr — will probably enable the fisherman to dis- 

 tinguish readily between them. The general colouring, more- 

 over, affords in most cases a good rough and ready guide : that 

 of the first or migratory group is always more or less greyish 

 silver, and that of the second golden or yellow — with, in the 

 case of the charrs, an occasional dash of crimson and orange 

 of various degrees of brilliancy on the belly. 



The charrs are, unfortunately, so seldom captured by the 

 rod and line that they are objects more of interest to the ich- 

 thyologist than to the fly fisher. 



The Sea Trout is the last of the Silver, or Migratory, Group 

 of British Salmonidce. We now come to the second division, 

 viz. the Non-migratory species of the family, in which are in- 

 cluded the Conimon or Yellow Trout, Salmo fario ; the Great 

 Lake or Grey Trout, Salmo ferox ; the Charrs, the Grayling, and 

 some other local species of no interest from an angling point 

 of view. 



