APPENDIX. 495 



Esox Lucius. 

 Salmo Tnitta. 



— Umhla. 

 Anguilla acutirostris. 



Those found in Lough Neagh, and not in Lake Geneva, are, 

 Gasteroateus aculeatus. 



— jyungitius. 

 Ahramis Brama. 

 Salmo Salar. 



— JEriox. 



— Fario. 



— ferox. 

 Coreyonus pollan. 

 Anguilla lutirostris. 



— mediorostris. 

 Petromyzon marinus. 



— Jluviatilis. 



— Planeri. 

 Ammocoetes hranchialis. 



Those obtained in the Lake of Geneva, and not in Lough Neagh, are, 

 Cottus f/obio. 

 Cypmius carjn'o. 



— tinea. 



— Jesses. 



— rutilus. 



— alburnus. 



— juculus. 



— bipunctatus. 



— 2)JlOXt7tUS. 



Coregonus thymallus. 



— fera. 



— hiemalis. 

 Lota vulgaris. 



Here we find the general result that might be anticipated from the geo- 

 graphical position of the two lakes, the more northern being the richer in 

 species of the genus Salmo ; the more southern in species of the Cyprinidce ; 

 for it is well known that in continental Europe the Salmonida; increase 

 in number northward, and the Vnprinidce southward. 



The value of the fishes of the northern lake is vastly greater than that 

 of the southern. The most striking difference in connexion with the 

 species which are common to the two lakes is, that eels, Avhich are rare at 

 Geneva, are abundant at Lough Neagh. There are four fisheries at Avhich 

 they are taken in the autumn, on descending from the lake to the sea. 

 The greatest of these fisheries is at Toomc, where the waters of the lake 

 are discharged into the river Bann. Here from 50 to (50 tons Avcight of 

 eels are annually taken in the season. So many as 70,000 fish, varying 

 from h lb. to 5 lbs. in weight, have been caught in one night. I have 

 myself seen 10,000 taken. They are sold at the fishery at 'Id. ])er lb. ; 

 but the greater portion of these is sent alive, in Avell-boats, to 1-oiulon, 

 where they produce from \M. to l.s. \wx lb. The only sjjecies of fish at 

 Geneva, of which \\c have regular returns of the iniml)er captured, is the 

 Salmo Trutta, and I regret that, owing to its being captured at L. Neagh 



