Dm the j-LUGWY, ]VoRTH V^ALES. 



Order IV. 



PIIYHOSTOMI. 



Family 

 SA LMONIDM. 



Snh-genfric Group — Salmones. 



iLACK-FINNED ^tlROUT. 



{^Salino nigripin?ns.) 



Salmo nii<ripinnis, 



Gunthrr's Cat. vi. p. 96. 



THIS well-marked species of non-migratory Salmonidcc appears to have escaped the obser- 

 vation of naturalists, as being specifically distinct from the Common Brown Trout fS./anoJ, 

 until Dr. Giinther brought it into notice. It is clearly distinct from /ario in some important 

 structural points; the maxillary in the Black-Fin is feeble, that of the Common Trout is strong; 

 the vomerine teeth are in a single series, in the Trout they are biserial ; the pectorals are 

 very long and pointed, the tail is forked or more deeply incised than in specimens of fano 

 of the same size. In colour, moreover, there is great difference between the Black- Fin and 

 the Common Brown Trout; the pectorals, especially in specimens of about seven or eight 

 inches long, are very black, as is also the caudal fin. 



I first made my acquaintance with this very interesting and beautiful species on my visit 

 to Lough Melvin in July, 187 8. The Black-Fin is the ordinary Trout of the Lake, where it 



