Gill-cover produced behind into a rounded angle: vomerine teeth extending the whole way: maxillaries reaching to a vertical line from the posterior part of the orbit: caudal slightly forked: back and sides with numerous red spots.

S. Fario, Linn. Syst. Nat. torn. i. p. 509. Block, Ichth. pls. 22, & 23. Turt. Brit. Faun. p. 103. Don. Brit. Fish. vol. iv. pl. 85. Flem. Brit. An. p. 181. Jard. in Edinb. New Phil. Journ. vol. xviii. p. 51. Trutta fluviatilis, Will. Hist. Pise. p. 199. Trout, Penn. Brit. Zool. vol. iii. p. 297. pl. 59. no. 146. River Trout, Id. (Edit. 1812). vol. iii. p. 399. pl. 70. Bowd. Brit, fr. wat. Fish. Draw. no. 14. Truite commune, Cuv. Reg. An. torn. li. p. 304.

Length

From one to two feet; sometimes more.

Description

(Form). General proportions resembling those of the S. Trutta: differs from that species in the form of the gill-cover, which is much more produced behind, forming at its distal extremity a rounded angle; basal margins of the opercle and subopercle rising more obliquely: snout short; but the jaws, which are nearly equal, becoming more lengthened in the spawning season: maxillary reaching to a vertical line forming a tangent to the posterior part of the orbit, by which character it is distinguished from the S. Salmulus: teeth on the whole length of the vomer: dorsal and adipose fins placed as in the Salmon; the former with the first three rays, the first especially, very small and inconspicuous, but gradually increasing in length; sixth and seventh longest; first four simple, the rest branched: anal entirely in advance of a vertical line from the adipose: caudal not so much forked as in the S. Trutta, or so square as in S. Eriox: number of fin-rays,

D. 14; A. 11; C. 19, etc.; P. 13; V. 9.

{Colours). Back dusky: sides and belly, the former more especially, yellow, tinged with gold, and also with green: a row of red spots along the lateral line: dorsal fin, and above the lateral line, spotted with dusky. In young Jish, more or less indication of transverse dusky bands on the sides.

Var.. Gillaroo Trout, Sow. Brit. Misc. pl. 61.

A common species in lakes and rivers, attaining in some localities to a large size. Has been known to weigh from sixteen to twenty pounds, though usually much smaller. In many places seldom exceeds a pound or a pound and a half. Spawns in September and October; ascending to the sources of rivers for this purpose. Is very voracious. Feeds on worms, small fish, and insects, especially Ephemerce and Phryganece. The variety, called the Gillaroo Trout, is distinguished by its strong muscular stomach, resembling the gizzard of birds, resulting from feeding principally on shells. It is found in some of the lakes in Ireland.

Obs

The above species exhibits very great variation in colours*, and in some measure in form also, according to the locality in which it is found. Possibly two or more species may have been hitherto confounded, but in the present state of the science it is almost impossible to decide this point. Sir W. Jardine, who has paid great attention to the whole family, and from whom we may expect much light upon the subject, has particularized some remarkable varieties found in Sutherlandshire, in the " Edinburgh New Philosophical Journal," 1. c, to which I refer the reader. According to Agassiz, the S. punctatus of Cuvier, the S. mar-moratus of the same author, and the S. alpinus of Bloch, all belong to this species.