C. Trachurus, Cuv. et Val. Poiss. torn. ix. p. 9. pl. 246. Scomber Trachurus, Block, Ichth. pl. 56. Don. Brit. Fish. vol. 1. pl. 3. Trachurus vulgaris, Flem. Brit. An. p. 218. Scad, Will. Hist. Pise. p. 290. tab. S. 22. Penn. Brit. Zool. vol. iii. p. 269. pl. 51. Scad, or Horse-Mackerel, Yarr. Brit. Fish. vol. 1. p. 154.
From twelve to sixteen inches.
(Form). General form resembling that of the Mackerel: tail slender; head a little pointed, rather less than one-fourth of the entire length: greatest depth a little more than one-fifth; thickness half the depth: lower jaw projecting beyond the upper, inclining upwards at an angle of forty-five degrees: in each jaw one very narrow row of extremely minute teeth, more sensible to the touch than to the eye; the same on the vomer and palatines: eyes large, above the middle of the cheek: cranium, cheeks, and all the body, covered with small scales; snout, jaws, and opercular pieces, without scales, the upper half of the opercle excepted: lateral line parallel to the back, at one-fourth of the depth, till opposite the commencement of the second dorsal; then bending obliquely downwards and backwards; when in a line with the ninth ray of that fin, passing off straight to the caudal at half the depth; protected throughout its course by a series of large scaly lamina?, seventy-two in number, three or four times as high as broad, closely compacted; the last forty of these lamina) with keels terminating backwards in sharp points, the keels more elevated and the points sharper as they get nearer the caudal: first dorsal commencing at about one-third of the length, triangular, its length and height about equal; third and fourth rays longest; before it a small, but sharp, horizontal spine, with the point directed forwards: second dorsal immediately behind the first; three times its length; its height at first nearly the same, but afterwards falling, and remaining low throughout the rest of its length: behind the vent, two stout, sharp spines, united at their base by a short membrane; then the true anal, exactly similar to the second dorsal excepting in being shorter, and commencing nearer the caudal; its point of termination in the same vertical line: both dorsal and anal arising from deep grooves in the hack and abdomen respectively: pectorals falcate, very much pointed, of the length of the head: ventrals a little behind them, scarcely more than half as long: caudal deeply forked:
* Linn. Trans, vol. xiv. p, 82.
B. 7; D. 8 - 1/30; A. 2 - 1/25; C. 17, and 10; P. 21; V. 1/5. (Colours). Lead-gray, variegated with blue and green; beneath silvery; a black spot on the upper part of the opercle; irides golden.
Common throughout the Summer, according to Mr. Couch, off the coast of Cornwall. Occurs also at Hastings, and off other parts of the English, as well as Scotch, coast. Preys on other fish. Obs. Cuvier and Valenciennes describe this fish as varying greatly in the number of scaly laminae on the lateral line, as well as in the degree of curvature of this last, and seem to think that possibly two or more species may have been hitherto confounded. For this reason I have been the more particular in the above description, which is taken from specimens obtained at Hastings, Sept. 1833.