Vomerine teeth confined to the anterior extremity: dorsal exactly in the middle of the entire length: anal commencing in a line with the tip of the reclined dorsal: axillary scale not one-third the length of the ventrals.
S. Salvelinus, Don. Brit. Fish. vol. v. pl. 112.
(Form). Differs from the last species as follows: not so much elongated in proportion to its depth: head larger; contained not more than four times and a half in the entire length: teeth, those on the tongue especially, stronger and more developed: eyes larger; their diameter rather more than one-fourth the length of the head; the distance between them not equalling above one diameter and a half: posterior lobe of the opercle not so much produced: all the fins relatively larger: dorsal exactly in the middle of the entire length; the distance in front, when measured behind the fin, reaching to the end of the caudal; fifth and sixth rays longest, equalling at least three-fourths of the depth of the body; posterior portion of the fin very little less elevated than the anterior: adipose nearer the middle point between the dorsal and the caudal: anal commencing exactly in a line with the tip of the reclined dorsal: pectorals longer: scale in the axillae of the ventrals much shorter, not one-third the length of the fin:
B. 9; D. 14 or 15; A. 13; C. 19, etc.; P. 13; V. 8.
(Colours). Probably as variable as in the last species. The following were those of the specimens examined: head, back, and upper part of the sides, dark olivaceous-green; lower part of the sides yellowish, passing into bright orange-red on the abdomen: above the lateral line spotted with yellowish white; yellow of the sides, beneath the lateral line, spotted with red: dorsal, caudal, and pectorals, dark olivaceous; first and last rays of the pectorals, and the whole of the anal and ventrals, bright red.
Whether this species be found on the Continent, or be the same as any of those described by foreign authors, it is not easy to determine, owing to the great confusion which prevails in this genus. I have, however, little hesitation in considering it as the S. Salvelinus of Donovan, though not of Turton and Fleming, who appear to have confounded it with the Red Charr of Pennant, which is only a variety of the last species. The same may be said of Willughby, who has comprised them both under the title of Umbla minor, Gesn.* That it is distinct from the S, Umbla of this work (the S. alpinus of most English authors) no one, I conceive, can doubt, who has had an opportunity of comparing the two. My examination was made from specimens in the possession of Mr. Yarrell, who obtained them from Corsygiddel Lake near Barmouth. According to Donovan, it is found in the Waters of Llyn Quellyn, one of the alpine lakes on the west side of Snowdon; he adds, that formerly it was also met with in the Llanberris Lake, on the opposite side of the mountain, but that of late years it has disappeared in the locality last mentioned. The species appears to be confined to Wales, in which country it is said to be called Torgoch, a Welch term signifying Red-belly.