Vomerine teeth extending the whole way: maxillaries reaching to beneath the centre of the orbit: caudal forked for half its length: sides marked with long, narrow, transverse, bluish bands.
S. Salmulus, Turt. Brit. Faun. p. 104. Jard. in Edinb. New Phil. Journ. vol. xviii. p. 56. Salmulus, Will. Hist. Pise. p. 192. tab. N. 2. fig. 2. Ray, Syn. Pise. p. 63. Samlet and Parr, Penn. Brit. Zool. vol. iii. p. 303. pl. 59. no. 148. & pl. 66. no. 78. Id. (Edit. 1812). vol. iii. p. 404. pls. 70, & 77.
From six to eight inches.
(Form). Closely resembling the young Trout, but differing in the following particulars. Body somewhat deeper in proportion to its length: snout blunter: teeth weaker and less developed; those on the tongue not very conspicuous: maxillary shorter, not reaching beyond a vertical line from the centre of the orbit; also broader at its posterior extremity: gill-cover not so much produced into an angle, the hinder margin being more regularly rounded, as in the Salmon: " scales, taken from the lateral line below the dorsal fin, altogether larger, the length greater by nearly one-third, the furrowing more delicate, and the form of the canal not so apparent or so strongly marked towards the basal end of the scale †:" caudal more deeply forked, the fork extending about half its length: pectorals larger. (Colours). "The row of blue marks on the sides, which are also found in the young Trout, and in the young of several of the Salmonidce, in this species are narrower and more lengthened, The general spotting seldom extends below the lateral line, and two dark spots on the gill-cover are a very constant mark." Jard. According to Pennant, "the adipose fin is never tipped with red; nor is the edge of the anal white".
* Syn. vol. i. p. 79.
† This character, which I have not had an opportunity of verifying myself, is taken from Sir W. Jardine.
This fish, which is common in many of the rivers of Wales and Scotland, as well as in some of those in England, has been regarded by different observers as the young, either of the Salmon, the Sea Trout, or the common Trout. It is, however, now pretty well ascertained to be a distinct species, always remaining of a small size. Is called in some places a Parr, in others a Skirling or Brandling. Said, by Sir W. Jar-dine, " to frequent the clearest streams, delighting in the shallower fords or heads having a fine gravelly bottom, and hanging there in shoals, in constant activity, apparently day and night." According to Dr. Hey-sham*, the adult fish go down to the sea after spawning, which takes place, as in the other migratory species of this genus, in the depth of Winter.