44 DR. A. GUNTHER ON THE BRITISH CHARRS. [Feb. 1], 
cover produced behind into a rounded lobe, the axillary scale nearly 
half as long as the ventrals, the fourteen dorsal rays,”’ are characters 
which tend to show that a species was examined different from that 
of the Lake of Windermere, and closely approaching the Llanberris 
Torgoch, although I should not venture to identify it with the latter. 
Mr. Jenyns describes his second species as the Torgoch, and calls 
it S.salvelinus. If unfortunately the specimens from which this se- 
cond description was taken had been lost, everybody, like Parnell, 
would have been at a loss to reconcile it with any of the Charrs known. 
“‘The dorsal fin is exactly in the middle of the entire length; the 
body is not so much elongated in proportion to its depth ; posterior 
portion of the dorsal very little less elevated than the anterior,” &c. 
Such are the characters attributed to the Torgoch ; but they are not 
in accordance with the typical specimens, which are still preserved 
and now in the British Museum. They, indeed, are identical with 
the Llanberris species, the proper characters of which may be found 
in the detailed description subjoined to this paper. 
1838. If PaRNELL’s description* has been taken from a Scotch 
specimen, it is the only one which has been drawn up of the so- 
called Northern Charr ; but much is detracted from its value when 
we consider that the author preserved his specimens as flat skins ; 
therefore his statement, that the height of the body of a specimen 
15} inches long was equal to the length of the head, and one-sirth 
of the total, does not express a peculiarity of the Northern Charr : 
but this elongate form of the body was probably caused by the way 
of preservation. Parnell’s other observations on the Charr are bor- 
rowed from other authors, who had made their observations chiefly 
on English and Welsh specimens. 
1840. The view of Agassiz was essentially supported by the late 
W.Tuompson of Belfast, who, having had opportunity of examining 
the Charrs of Windermere, Loch Grannoch, Lough Melvin, and of 
nive other lakes in Scotland and Ireland, came to the conclusion 
that they are but one species—one, however, that is subject to extra- 
ordinary variety}. 
But Mr. Thompson has not brought forward any other proof for 
this assertion, than the other assertion that the differences presented 
by the Charr from various localities are very manifold. The following 
appeared to him the most striking differences :— 
1. In specimens from Loch Grannoch the male fish has the colours 
of S. salvelinus, Donov.; the female those of S. alpinus, Donoy. 
The male has a much larger head and larger fins than the female. 
Number of ova, 500. 
2. In specimens from Lough Melvin both sexes are coloured 
alike ; nor can they be distinguished from each other by the size of 
the fins. Number of ova, 959. 
The differences observed in the Charrs from the other localities 
are not pointed out. Certainly, if Mr. Thompson had really seen 
those in the size of the scales and of the teeth, he would have men- 
* Fishes of the Firth of Forth, p. 148 (S. umdila). 
ft Ann. & Mag. Nat. Hist. 1840, vi. p. 439. 
