Jordan and Evermann. Fishes of North America. '.K)i> 



1301. DECAPTKBUS ICAHELLUi (Cuvier & Valouciimuos). 

 (MACKEREL SIIAU; ANTONINO.) 



Head 5 ; depth 6. D. VIII-I, 33-1 ; A. II-1, 27-1 ; teeth obsolete ; scutes 

 beginning at end of dorsal, 25 of them with keels. Lateral line nearly 

 straight. Silvery, plumbeous below ; a small black spot o'n the opercle. 

 Warm parts of the Atlantic, straying northward to Cape Cod ; scarce on 

 our coast. Length 1 foot. (French maquereau, mackerel, the name 

 applied to the species in Martinique.) 



Caranx macarellus, CUVIER & VALENCIENNES, Hist. Nat. Poiss., ix, 40, 1833, Martinique; GtfN- 



THEII, Cat., n, 426, I860. 

 Decapterus macarellus, POEY, Enuraeratio, 79, 1875; JORDAN & GILBERT, Proc. U. S. Nat. Mus., 



1883, 1'JU; JORDAN & GILBERT, Synopsis, 433, 1883. 



416. TRACHURUS, Raiinesque. 



(SAURELS.) 



Trachurus, HAFINESQUE, Indice d'lttiologia Siciliana, 20, 1810, (trachurus). 

 Tnichtmta, CUVIER, llegne Animal, Ed. 1, 1817, (trachurus). 



Body rather elongate, somewhat compressed, not elevated, tapering to 

 a slender caudal peduncle, which is as broad as deep. Scales present, not 

 very small. Lateral line armed throughout with plates, those on the 

 caudal peduncle larger and spinous ; an accessory dorsal branch to the 

 lateral line. Snout rather long. Mouth moderate. Minute teeth mostly 

 in single series on jaws, vomer, and palatines. Dorsals 2, the first pre- 

 ceded by a procumbent spine. No finlets- Two strong spines before the 

 anal, connected by membrane. Pyloric cceca numerous. About 4 species 

 known ; found in all warm seas, (rpaxovfiog, the ancient name of Trachurua 

 trachurus; from rpa%v, rough; owpd, tail.) 



a. Body elongate, little compressed, the depth 5 in length ; scutes about 96 (50 + 46 to 48) in 

 number, the height of the anterior scutes % that of the posterior and about iy A in 

 diameter of eye; curved part of lateral line scarcely shorter than straight part; maxil- 

 lary 2% in head, reaching just beyond vertical from front of eye; lining of opercle 

 scarcely blackish. PICTURATUS, 1302. 



aa. Body comparatively deep and compressed, the depth 4 to 4% in length; scutes about 72 

 (34 to 36 + 36 to 38) in number, the anterior scutes scarcely lower than the posterior, 

 their height about 1^ in diameter of eye; length of curved part of lateral line 1? to 

 Ijj in straight part; maxillary reaching past front of pupil, 2% to 2^ in head; lining 

 of opercle blackish. TRACHURUS, 1303. 



1302. TKACHURUS PICTURATUS (Bowdich). 

 (HORSE-MACKEREL; XUREL.) 



HeadSf; depth 5. D. VIII-I, 31; A. II-I, 27; scales 50 + 47 in Cali- 

 fornia examples, 90 to 108 in others. Similar to Trachurus trachurus, but 

 slenderer and less compressed and reaching a much larger size. Arch of 

 lateral line longer, as long as straight part, the junction of the two much 

 beyond tip of pectoral; plates on the anterior part small, crowded, their 

 height less than half eye. Length 2 feet. Warm seas, especially common 

 on the coast of California, from San Francisco southward to the Galapagos 



