CHAP. XVT 



THE BRITISH ISLES 



341 



confined to single lakes, often of small area, and these latter 

 offer examples of the most restricted distribution of any 

 organisms whatever. Cases of this kind are found in our 

 own islands, and deserve our especial attention. It has 

 long been known that some of our lakes possessed peculiar 

 species of trout and charr, but how far these were 

 unknown on the continent, and how many of those in 

 different parts of our islands were really distinct, had not 

 been ascertained till Dr. Gtinther obtained numerous 

 specimens from every part of the country, and by com- 

 parison with all known continental species determined 

 their specific differences. The striking and unexpected 

 result has thus been attained, that no less than fourteen 

 well-marked species of freshwater fishes are altogether 

 peculiar to the British Islands. The following is the list, 

 with their English names and localities : — ^ 



Freshwafer Fishes peculiar to the British Isles. 

 Latin Name. 

 Salmo BRACHYPOMA 



ORCADENSIS.. 

 FEKOX 



9. 

 10. 

 11. 



stomachicits 

 nigpjpinnis . 



levenensis . 



Perish 



Wll.LUGHBII 



KILLINENSIS 



COLII 



Grayi 



English Name. 

 Short-headed salmon 



Loch Stennis trout... 

 Great lake trout 



Gillaroo trout 



Black-finned trout . . . 



Loch Leven trout ... 



Welsh charr 



Windermere charr . . . 



Loch Killin charr . . . . 



Cole's charr... 



Gray's charr 



Locality. 



Firth of Forth, Tweed, 

 Ouse. 



Lakes of Orkney. 



Larger lakes of Scotland, 

 Ireland, the N. of 

 England, and Wales. 



Lakes of Ireland. 



Mountain lochs of Wales 

 and Scotland. 



Loch Leven, Loch Lo- 

 mond, Windermere. 



Lianberis lake, N. 

 Wales. 



Lake Windermere and 

 others in K. of Eng- 

 land, and Lake Brui- 

 ach in Scotland. 



Loch Killin in Inverness- 

 shire. 



Lough Eske and Lough 

 Dan, Ireland. 



Lough Melvin, Leitrim, 

 IS'.W. Ireland. 



1 The list of names was furnished to me by Dr. Giinther, and I have 

 added the localities from the papers containing the original descriptions, 

 and from Dr. Houghton's British Freshivater Fishes. The most recent 

 corrections have been made by Mr. James R. Hill of Keswick, and by 

 Dr. Giinther. 



