Jordan and Evermann. Fishes of North America. 907 



Seriolu bipiunnlatu, QUOY & GAIMARD, Voy. Uranie, /oiil., i, 363, pi. 61, fig. 3, 1824, Keeling 



Islands. 



F.iiolapinnnlata,* POET, Memorias, n, 233, I860, Havana. 

 Elagati* bipiittuiJutim, BENNETT, Whaling Voy., n, 283, 183f>; MEEK A BOLLMAN, Proc. Ac. Nat. 



Sci. Phila., 1889, 42. 



Eliiglt* bijnnnnlata, GVNTIIER, Cat., II, 468, 1860. 

 Elm/nil* pitntttlalns, JORDAN & GILBERT, Synopsis, 44fi, 1883. 



415. DECAPTERUS, Bleeker. 

 (MACKEREL SCADS.) 



Decaplenm, BLEEKER, Natunrk. Tydschr., v, 417, 1855, (kurra). 

 Eudomatodus, GILL, Proc. Ac. Nat. Sci. Phila., 1862, 261, (kurroidex). 

 Gijmnepignathus, GILL, I. c., 261, (macrosoma). 

 Evepigymnus, GILL, Z c., 261, (hypodus). 



Body elongate, little compressed, almost perfectly fusiform. Head 

 short, pointed. Mouth rather small; jaws about equal, the dentition 

 feeble; maxillary rather broad, with a supplementary bone. Premaxil- 

 laries protractile. Scales moderate, enlarged for the whole length of the 

 lateral line, but spinous and bony posteriorly only ; second dorsal and 

 anal each with a single detached finlet; free anal spines very strong ; 

 first dorsal well developed, persistent; pectorals comparatively short. 

 Abdomen rather shorter than anal fin. Gill rakers long and slender. 

 Species numerous, (de/ca, ten; nrepov, fin; there being 10 fins, counting 

 the spurious finlets and excluding the free spines.) 



a. Shields of lateral line numerous, 40 to 50 in number; depth 5 in length; teeth present on 

 jaws, vomer, and palatines; none on tongue. 



b. Dorsal with 30 soft rays; lateral line anteriorly with about 12 distinct, small black 



points. PUNCTATUS, 1297. 



bb. Dorsal with 27 soft rays. SCOMBEINUS, 1298. 



aa. Shields of lateral line few, 20 to 30 in number. 



c. Teeth minute on both jaws, vomer, palatines, and tongue; shields 22 to 28; depth 5 in 



length. SANCT.TC-HELENJE, 1299. 



cc. Teeth distinct on lower jaw and tongue; caudal keel of 30 distinct shields; depth 5% 



in length. HYPODUS, 1300. 



ccc. Teeth obsolete; caudal keel of 25 shields; depth 5% in length. MACARELLUS, 1301. 



1297. DECAPTERUS PUNCTATUS (Agassiz). 

 (SCAD ; ROUND ROBIN ; CIGAR-FISH ; QUIA-QUIA.) 



Head 4fc; depth 5. D. VIII-I, 30-1; A. II-I, 24-1. Eye rather small, 

 shorter than snout, about equal to the width of cheeks or the inter- 

 orbital space. Maxillary reaching front of eye. Teeth on vomer and 

 palatines, none on tongue ; teeth in jaws in single series. Lateral line 

 little arched ; arch of lateral line nearly as long as straight part ; scutes 

 numerous, deep, crowded, about 40. Pectorals short, shorter than head. 

 Breast, cheeks, and top of head scaly. Bluish above, silvery below; a 

 dark opercular spot. Length 12 inches. Cape Cod to Brazil ; occasionally 



* There seems to be no difference between the American form called pinnulaltis and tire East 

 Indian bipinnulatus. 



