(1. Naucrates, Cuv).

Naucrates Ductor, Cuv. et Vol. Poiss. torn. viii. p. 229. pl. 232. Gasterosteus Ductor, Linn. Syst. Nat. torn. i. p. 489. Scomber Ductor, Bloch, Ichth. pl. 338. Pilot-Fish, Will. Hist. Pise. App. tab. 8. f. 2. Yarr. Brit. Fish. vol. i. p. 149.

Length

One foot.

Description

(Form). General contour a little like that of the MackareL' depth one-fifth of the whole length: length of the head contained in this last four times and a half: profile slightly convex; snout transversely obtuse; lower jaw projecting a little beyond the upper: each jaw with a narrow band of teeth like shorn velvet; the same on the palatines, vomer, and middle of the tongue: diameter of the eye one-fifth the length of the head: opercular pieces much as in the Mackerel: pectorals attached a little below the middle; oval, contained seven times and a half in the whole length: ventrals very close together, a little behind the insertion of the pectorals, of about the same length: first dorsal represented by three, rarely four, very small free spines, commencing nearly in a line with the extremity of the pectorals: second dorsal commencing about the middle of the body; anterior rays longest, equalling a little more than one third of the depth: anal of a similar form to this last fin, and commencing beneath the middle of its length; before it two small free spines, the first hardly perceptible: caudal forked to the middle; the lobes rather broad, and moderately pointed:

B. 7; D. 3 or 4 - 1/26 to 28; A. 2/16 or 17; C. 17, and 8; P. 18; V. 1/5: cheeks, upper part of the opercle, and the whole body, excepting a triangle above the base of the pectoral, covered with small oval scales; forehead, snout, jaws, and greater portion of the opercular pieces, without scales: lateral line curved, marked by a narrow series of very small elevations: sides of the tail with a projecting horizontal keel. Number of vertebrae twenty-six. (Colours). Silvery bluish gray; deeper on the back, paler on the belly: sides with five broad transverse bands of deep violet. Cuv..

Mr. Couch states* that "two of this species a few years since accompanied a ship from the Mediterranean into Falmouth, and were taken in a net." It has been observed in the British seas, under similar circumstances, in a few other instances. Is well known for its habit of following vessels to a considerable distance, in order to get what falls from them.

(Lichia, Cuv.?)

(6). Albacore, Couch In Linn

Trans, vol. xiv. p. 82. Lichia glaucus, Cuv. et Val. Poiss. torn. viii. p. 263. pl. 234.?

Mr. Couch states that he believes the Albacore to be not uncommon in the Summer off Cornwall, though keeping at a distance from the shore, and but rarely taken. This name, however, having, like that of Bonito, been applied to more than one species, it does not appear with certainty to which he alludes. If he .refer to the Scojnber glaucus of Linnaeus, this last is synonymous with the Lichia glaucus of Cuvier and Valenciennes. I have accordingly annexed a corresponding reference to their work for a description and figure.