3GO SYNOPSIS. 



Fish., i. p. 1 33. Rayan Gilt-head, Penn. Brit. ZooL, in. 

 p. 330. 



FAM. VI. Scomberidce. Mackerel Family. Vertical fins with- 

 out scales; body smooth, the scales being small, adpressed, and 

 entire; operculum and preoperculum without spines or denticu- 

 lations. 



GEN. XXII. SCOMBER. Body fusiform ; dorsals two, widely 

 separated, the space between the hinder dorsal and the base of 

 the tail, and the corresponding space behind the anal, occupied 

 by finlets ; sides of the tail with two small cutaneous ridges. 

 Sp. 43. Scomber. The Mackerel. Head conical, the under 

 jaw rather longest ; first dorsal triangular, with 12 rays, 

 second widely distant from it and only half as high ; fin- 

 lets five both above and below, tail deeply forked. Fin- 

 rays, D. 10 13 v : P. 13 : V. 6 : A. 11 v : C. 22. 

 Back and sides green varied with blue, and dark transverse 

 bands, belly silvery white ; ventrals and anal fins tinged 

 with red. L ; nn. S. scombrup, Cuv. Sf Vol., viii. p. 6; 

 Yaw. Brit. Fish., i. p. 137. Common Mackerel, Pcnn. 

 Brit. ZooL, iii. p. 357, pi. 62. 



Sp. 44. S. colias. Spanish Mackerel. First dorsal with 

 seven rays ; finlets six both above and below ; colour dark 

 blue on the back, striped nearly as in S. scomber, sides and 

 belly thickly covered with small dusky spots. Cuv. <k 

 Val, viii. p. 29, pi. 209 ; Yarr. Brit. Fish., i. p. 148. 

 S. maculatus, Couch, Mag. Nat. Hist., v. p. 22, fig. 8. 

 GEN. 23. THYNNUS. First dorsal elongated and nearly reach- 

 ing to the second, the space between the latter and the base of 

 the tail, and the corresponding space behind the anal, occupied 

 by finlets ; anterior part of the thorax surrounded with a series 

 of large scales, forming a corselet ; tail with an angulated keel 

 on each side between two small cutaneous ridges. 



Sp. 45. T. vulgai'is. The Tunny. Shape similar to that of 

 the mackerel, but the body more rounded ; dorsal fin gra- 

 dually decreasing in height to the hinder extremity, which 

 is very little in advance of the hinder dorsal ; finlets nine ; 

 pectorals subfalcate ; tail crescent-shaped ; upper parts very 



