74 



groove. The second dorsal rises shortly behind the first, is 

 very robust and triangular ; behind this are nine finlets. 

 Pectorals falsiform, very long, reaching nearly to the end of 

 the spinous dorsal. Ventrals beneath the pectorals, in a 

 groove at their basis. Anal fin posterior to the second 

 dorsal ; posterior to this nine fiulets. Caudal fin lunated. 

 Upper surface bluish-black ; sides silvery ; beneath white. 

 Gill covei-s silvery grey. Finlets bright yellow. Length, 9 

 to 12 feet. 



Fin-rays :— D. 14, 13-f IX ; P. 31 ; Y. 1, 5 ; A. 2, 12-f IX ; 

 C. 19. 



Scomber tlajhims, L. Syst. I, p. -493 ; Bl. tab. 55. 



Thynnus vulgaris, Cuv. & Val. YlII, p. 58, pi. 210: Cuv. 

 Eegne Anim. 111. Poiss. pi. lo, fig. 2 ; Storer, Fishes of 

 Massach. p. 17; DeKay, New York Fauna, Fish, p. 105, pi. 10, 

 fig. 28. 



— thynnus, Guenther, II, p. 362. 



Belongs to the Ocean adjoining our coast, and is a well- 

 known inhabitant of the Atlantic. 



XXV -CARANGIDffi. 



DECAPTERUS, Blceker. 

 D. niacarellus^ 



Mackerell Scad. 



The height of the body is Q\ of the total length ; the length 

 of the head 5.^. The lateral line is nearly straight, covered 

 anteriorly with a series of round scales, posteriorly with 

 twenty-five small plates. Opercular spot small. 



Fin-rays:-^D. 8^3, I; A. 2.^, I. 



Caranx macarellus, Cuv. & Yal. IX, p. 10. 



