210 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



Body rather round, less compressed than in related species; dorsal 

 outline slightly more convex anteriorly than the ventral, with a 

 slightly compressed edge over occipital region; head rather low, 

 moderately compressed; snout fairly long, 3.4 in head; eye 5.75; 

 interorbital 3.1; mouth rather large, oblique; lower jaw projecting 

 slightly; maxillary fully three-fourths as broad as eye, 2.6 in head; 

 teeth small, those in upper jaw in a band, a few of fchem slightly en- 

 larged, in a single series in lower jaw; gill rakers slender, about as 

 long as eye, 28 on lower and 10 on upper limb of first arch; lateral line 

 with a long low curve, descending rather abruptly under origin of 

 second dorsal, the chord of curved part a little more than half the 

 length of the straight part, 4.0 in length, scutes mostly quite strong, 

 45 more or less developed; scales extending forward in parietal region, 

 and on cheek, covering entire chest; first dorsal composed of fairly 

 strong spines, connected by membranes, the fourth the longest, about 

 as long as snout and half the eye, origin of fin approximately an eye's 

 diameter behind base of pectoral; second dorsal and anal similar, 



Figure 46. — Caranx caballus Giinther. From a specimen 420 mm. long, Lobos de Tierra 

 Island, Peru (U.S.N.M. No. 77701). (After Evermann and Radcliffe, 1917.) 



somewhat elevated anteriorly, the lobe of second dorsal scarcely 

 longer than longest spine of first dorsal, origin of anal an eye's diameter 

 behind that of second dorsal, the fins coterminal; base of anal (ex- 

 clusive of free spines) 2.8 in length; ventral moderately small, in- 

 serted immediately behind pectoral, 2.5 in head; pectoral long and 

 falcate, extending well beyond origin of anal, 2.9 in length. 



"Color in alcohol, dusky blue or green on back; belly silvery 

 tinged with golden; a black area on posterior border of opercle 

 above base of pectoral; axil of pectoral black ; fins dusky" (Evermann 

 and Radcliffe). The color of the specimen described has now faded 

 to a grayish brown above and yellowish underneath. 



The Mission did not obtain this species. The description is based 

 on the specimen described by Evermann and Radcliffe (see reference 

 above), secured at Lobos de Tierra by R. E. Coker. The total 

 length given by Evermann and Radcliffe was 420 mm. (caudal fin 



