The Cavallas 



gg. Pectoral fin very long, much longer than head; scutes about 

 40; caballus, 306 



ff. Body oblong-ovate, the depth more than \ the length. 



h. General colour silvery; vertical fins not all black. 



7. Body moderately elevated, the depth in adult to ^ the length; 

 opercular spot very small or obsolete; no pectoral spot. 



/. Body rather slender, the depth about 2f in the length; dorsal 

 and caudal fins largely black; marginatus, 306 



jj. Body deeper, the depth about 2\ in length; caudal fin pale, 

 the dorsal scarcely dusky ; latus, 306 



ii. Body much elevated, the depth in adult 2\ in length-; no oper- 

 cular spot; a dark spot in axil; medusicola, 307 



hh. General colour brassy or blackish; vertical fins black. 



k. Anterior profile gibbous, scutes about 28; htgubris, 307 



hk. Anterior profile scarcely gibbous; scutes about 35; 



melampygus, 307 



aa. Teeth on vomer and palatines wanting or deciduous;.... 



guara, 307 



Carangus vinctus . is known only from the Pacific Coast of 

 Mexico from Lower California to Punta Arenas. It is a well- 

 marked species, abundant about the entrance to the Gulf of 

 California. 



Colour, dusky, bluish above, silvery below, with golden and 

 greenish reflections; 8 or 9 vertical dark half-bars from back to 

 below lateral line, the widest about equal to diameter of orbit, 

 and more than twice as wide as the light interspaces; breast 

 blackish; head dusky, end of snout black; a distinct black blotch 

 on upper angle of opercle; fins somewhat dusky, the lower yel- 

 low in life; pectoral without spot; axil dusky; anal white at 

 tip. 



Carangus ruber is known only from Cuba and St. Croix, in 

 the West Indies; not abundant enough to be of any value as 

 food. 



Colour, bluish-olive, silvery below, scarcely yellowish in life; 

 a vaguely defined horizontal stripe of clear blue just below the 

 dorsal; dorsal yellowish-gray, other fins dusky olive; a distinct 

 blackish bar extending along lower lobe of caudal. 



Carangus bartholomcei occurs in the West Indies, and occa- 

 sionally north to Florida and the Carolinas. It is common about 

 Cuba and is of some little value as food. 



35 



