434 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



very numerous in all warm seas, most of them valued for food. As here 

 understood, this genus includes a considerable variety of forms, differing 

 in the dentition and in the shape of the body. Its members seem, how- 

 ever, to form an almost unbroken series from one extreme to another.. 

 {■/.dpa^ head. "A cause de I'espece de prominence que presente leur tete, 

 de ]a force de cette parti3, de I'eclat dont elle brille, et d'ailleurs pour 

 annoucer la sorte de puissance et de domination que i)lnsieurs osseux 

 de ce genre exerceut sur un grand nombre des poissons que frequentent 

 les rivages" Lacepede). 



Our species may be divided as follows : 



a. Teeth present, small, nearly uniform, or the outer somewhat enlarged; no canines. 

 iSdar Bleeker.) 



ft. Body fusiform, elongate crumenophthalmua, 



bh. Body ovate or subfusiform. 

 0. Depth one-third or less than one-third the length to base caudal. 



pisquetus; cahallus; ciii. 



cc. Depth more than one-third the length beani ; falcatua. 



aa. Teeth unequal ; lower jaw with small canines. (Carangus) faUax; hippus. 



a. Teeth present, small, nearly uniform ; the outer row sometimes enlarged ; no canines. 

 {Selar* Bleeker.) 

 b. Body fusiform, elongate. (Trachurops Gill.) 



6§4. C. crumenoplltlialmus (Bloch) Lac. — Goggler; Big-eyed Scad. 



Bluish olive above, silvery below, a faint opercular spot. Body ob- 

 long-elongate, little compressed, the back not elevated. Head elongate, 

 rather pointed, the lower jaw projecting ; maxillary reaching past the 

 front of the eye, which is very large, longer than snout, about 3 in head. 

 Eye much deeper than the cheeks and greater than the iuterorbital 

 width. A single series of small teeth in each jaw ; very weak teeth on 

 vomer and palatines ; a patch of teeth on tongue. Shoulder-girdle near 

 isthmus with a fleshy projection, in front of which is a deep cross-fur- 

 row; adipose eyelid largely developed. Scales comparatively large. 

 Cheeks and breast scaly. Gill-rakers long, numerous. Lateral line 

 scarcely arched, its scutes weak, but little carinated. Dorsal spines 

 slender; free anal spines strong; pectorals falcate, nearly as long as 

 head. An angle at lower i)osterior part of opercular region as in Glupea. 

 Head 3J; depth ^. D. VIII-I, 26; A. II-I, 22; scutes 35. Cape Cod 

 to Madagascar; abundant in tropical seas. 



{Scomber cnimenoplithalmus Bloch, taf. 343; Giiuther, ii, 4-29: Trachurops crumenopJi- 

 thahnus Gill, Proc. Acad. Nat. Sci. Phila. 18G2, 431.) 



bb. Body ovate or subfusiform. 



c. Depth one-third or less the length to base of caudal. 



' * Bleeker, Natuurk, Tydschr. 1855, v, 417. 



