918 
FISHES. ACANTHOPT. Trachurus. 
D. 10, 2d D. 13 ; P. 13 ; V. 6 ; A. 11 ; C. 22. The tail is forked. Easily taken 
by a bait on the surface in a breeze. — A gregarious fish ; and, like the herring, 
approaches the shores to spawn. 
162. S. Thynnus. Tunny Mackerel. — Eight spurious fin- 
lets above and below. Second dorsal and anal fins falcate. 
Thunnus, Sihh. Scot. 23. Will. Ich. 176. — S. Th. Linn. Syst. i. 493. 
Penn. Brit. Zool. iii. 266. Don. Brit. Fishes, t. v — E, Spanish Mac- 
kerel; S., Stoer Mackerel — Rare in England, frequent on the west 
coast of Scotland. 
Length about 3 to 7 feet. Body round, slender and angular towards the 
tail; black above, silvery beneath, tinged with purple. 1. D. 14, 2d D. 14 ; 
P. 34 ; V. 6 ; A. 13. Tail lunate. — This species feeds on herrings and pil- 
chards. 
According to Mr Stewart, the S. Pelamis “ has been taken, though rarely, 
in the Frith of Forth.” — Elements, i. p. 363. 
Gen. LXXXIII. TRACHURUS. Scad. — Dorsal and 
anal fins entire. A row of large imbricated spinous scales 
on the lateral line. 
‘ 163. T. vulgaris. Common Scad.— Body variegated, blue 
and green ; the belly white. 
Will. Ich. 290. — Scomber Trach. Linn. Syst. 494. Penn. Brit. Zool. iii. 
269 — H orse-Mackerel. — Rare. 
Length 15 inches. Lower jaw longest ; no teeth; eyes large, irides sil- 
very. The lateral line with a curve ; the broad scales are produced into a 
spine in the middle of the free edge, the rest of the margin denticulated ; 
smaller scales between. 1st D. 8, 2d D. 34 ; P. 20 ; V. 6. Tail forked.— Wil- 
loughby, Pennant, and Donovan, mention the occurrence of this fish on the 
English coast. I found a mutilated example cast ashore in the estuary of 
the Tay, June 1823. 
Mr Couch adds, in reference to the T. glaucus., or Abacore, as a native of 
the Cornish seas ; “ I believe this fish is not uncommon in the summer ; but 
keeping at a distance fi*om the shore, and seldom taking a bait, is but rarely 
taken.” — Linn. Trans, xiv. 82. 
Gen. LXXXIV. ZEUS. Doree. — Two anal fins. Jaws 
protrusile ; gape wide. The spinous portions of the dor- 
sal and anal fins divided from the cartilaginous by a de- 
pression. Ventrals thoracic. 
164. Z. Faber . — Spinous rays of the first dorsal with long fi- 
laments. 
Faber, Merr. Pin. 187. Will. Ich. 294 — Zeus Faber, Linn. Syst. i. 454. 
Penn. Brit. Zool. iii. 221. Don. Brit. Fishes, t. 8.— On the English 
coast. 
