Great Lake Trout (S. ferox), Jard. in Encycl. Brit. (7th Edit). Art. Angling, p. 142. Id. in Edinb. New Phil. Journ. vol. xviii. p. 55.

Description

{Form). "Principally distinguished by its large size, square tail in all its stages of growth, the form of the gill-covers and teeth, the relative position of the fins, the form of the scales, particularly those composing the lateral line, and in the generally delicate skin which is spread over the outside of the body'being extremely strong and tough, and from under which the perfectly transparent scales can be extracted. The fins may be stated nearly thus, though a greater variation may occur;

* Sir H. Davy was of opinion, that when Trout feed much on hard substances, such as larvte and their cases, and the ova of other fish, they have more red spots, and redder fins: and that when they feed most on small fish, as minnows, and on flies, they have more tendency to become spotted with small black spots, and are generally more silvery. See Salmonia, (2nd Edit). p. 41.

D. 13 to 15; A. 12; P. 14; V. 11; gill-covers, 12: the greatest variation occurs in the dorsal fin." Jard. {Colours). "Deep purplish brown on the upper parts, changing into reddish gray, and thence into fine orange-yellow, on the breast and belly: the whole body, when the fish is newly caught, appearing as if glazed over with a thin tint of rich lake-colour, which fades rapidly away as the fish dies: gill-covers marked with large dark spots: the whole body covered with markings of different sizes, and varying in amount in different individuals; the markings, in some, few, scattered, and of a large size; in others, thickly set, and of smaller dimensions: each spot surrounded by a paler ring, which sometimes assumes a reddish hue: the spots more distant from each other as they descend beneath the lateral line: lower parts of the fish spotless." Jard.

A new species first identified as distinct from the Common Trout by Sir W. Jardine and Mr. Selby. The former of these gentlemen states that it is generally distributed in all the larger and deeper lochs of Scotland, but that it seldom ascends or descends the rivers running into or out of them, and never migrates to the sea. Very voracious, feeding nearly entirely upon small fish. Average weight from ten to twenty pounds: has been known, however, to reach twenty-eight pounds. Spawns in Autumn. Obs. It is probably the same as the S. lacustris of Berkenhout*, though (in the opinion of M. Agassiz) not of continental authors.