152 SALMON AND TROUT. 
‘is the common yellow fin, or Salmo fario, and the bull trout 
are the salmon of the river. There are no true salmon, Salmo 
salar, in Coquet, the only sea fish frequenting the river being 
bull trout ; but with Coquet-side fishermen the terms salmon 
and bull trout are synonymous: hence “salmon” with them 
means Salmo eroix, or bull trout, and “trout” Salmo fario, or 
common river trout.’ 
Principal Characteristics of the Bull-Trout.—Length of head compared to 
body only, as 1 to 4; general form of body similar to that of the salmon, but 
nape of neck and shoulders thicker, and fleshy portion of tail and base of each 
of the fins more muscular. Teeth of female smaller than those of male. 
Elongation of lower jaw confined to the males only, but not so conspicuousas in 
the salmon, Scales rather smaller and more numerous than those of a salmon 
of equal size. Colour: when in good condition, like’that of the salmon trout ; 
at spawning time, (in the males) head olive-brown, body reddish or orange 
brown ; (in the fema/es) blackish grey; in both fish the back fins reddish brown, 
spotted with darker brown, tail fins dark brown, the other fins dusky brown. 
Vertebrze commonly 59, occasionally 60. 
Fin rays: D. rz: P. 14: V.g: A. 11: C. 19. 
The following were the principal dimensions of a very hand- 
some specimen which I had sent up to me from the Tweed: 
Total length, tail fin included, two feet four and a half inches, 
girth at shoulder, just behind head, fourteen and a half inches, 
weight eight and a half pounds. 
THE SEA TROUT OR SALMON TROUT 
(Salmo trutta). 
Passing now to the last of our silver or migratory group, 
we come to the sea trout, or as it is sometimes called salmon 
trout, Salmo trutta, a fish much more frequently met with than 
the preceding species and as a food fish ranking ‘ with, but after’ 
the salmon, with which, also, owing to the general similarity of 
its habits, it is included in all statutory restrictions, 
Under a separate heading in this article the marks by 
which the sea trout can be most readily distinguished from 
the salmon and bull trout are given in detail, and beyond this 
it need only be observed generally that in appearance it is 
