940 Bulletin 47, United States National Museum. 



a. Dorsal with 19 to 20 soft rays; anal with 17 to 19 soft rays. 



b. Body very much compressed; sides with narrow black cross bars; lobes of vertical fins 

 elongate, reaching past middle of caudal fin in adult. 



c. Snout subtruncate or nearly vertical; profile from supraorbital to front of dorsal fin 



convex. GLAUCUS, 1335. 



cc. Snout low, very oblique; profile from supraorbital region to dorsal scarcely con- 

 vex; bands on body narrow, obsolete in the young; vertical fins with red. 



RHODOPUS, 1336. 



bl>. Body moderately compressed; sides without narrow black cross bara; lobes of vertical 

 fins shorter, rarely reaching base of caudal; lobes of dorsal and anal usually 

 blackish. 



d. Body broad, ovate; the back arched; the greatest depth at all ages nearly % length 



of body; profile from nostril to dorsal everywhere nearly evenly convex; axil 

 without black spot. 



e. Lobes of vertical fins much elevated, that of dorsal in adult much longer than 



head; color pale. FALCATUS, 1337. 



ee. Lobes of vertical fins low, that of dorsal in adult shorter than head; color 



dusky. CULVEKI, 1338. 



dd. Body oblong, the profile not strongly arched; the depth in young and old 2 to 2f 



in length of body ; dorsal lobes low. 



/. Axil with a jet-black spot; depth about 2% in length; snout blunt, project- 

 ing beyond the mouth. KENNEDYI, 1339. 

 ff. Axil not black; depth about 2f in length. GOODEI, 1340. 

 oa. Dorsal with 25 to 27 soft rays; anal with 22 to 26 soft rays; body oblong, rather robust; 

 greatest thickness 3 in greatest depth of body; depth less than half length; lobes of 

 vertical fins short, not black; sides without dark cross bars. 

 (/. Dorsal with 25 soft rays; anal with 22 soft rays; profile from snout to procumbent spine 



evenly convex. 



h. Body very deep, the depth about half length. ARGENTEUS, 1341. 



hh. Body moderately deep, the depth about 2^ in length. 



'. Head moderate, about 4 in body; dorsal lobe pale. CAROLINUS, 1342. 



it. Head large, 3% to 3% in body; dorsal lobe black. PALOMA, 1343. 



gg. Dorcal with 27 soft rays; anal with 26. CAYENNENSIS, 1344. 



1335. TRACHINOTUS GLAUCUS (Bloch). 

 (GAFF-TOPSAIL PAMPANO ; OLD WIFE ; PALOMETA.) 



Head 4 ; depth 2 ; eye 3f. D. VI-I, 19; A. II-I, 18. Pyloric ccsca 13. 

 Body elliptical, much compressed; snout blunt, subtruiicate, vertical 

 from mouth to horizontal from upper edge of eye; the profile from 

 supraorbital to front of dorsal fin convex. Mouth nearly horizontal ; 

 maxillary nearly reaching vertical from middle of eye, its length 3 in 

 head; jaws without teeth in the adult; dorsal spines separate in the 

 adult; dorsal and anal fins falcate, the anterior soft rays reaching middle 

 of caudal fin ; dorsal lobe H, anal If in length of body ; ventrals reach- 

 ing distance to vent, their length 2? in head ; caudal very deeply forked, 

 its lobes nearly half length of body. Color bluish above, golden 

 below; lobes of dorsal and anal very dark; rest of fins pale, with bluish 

 edges ; caudal bluish ; pectorals golden and bluish ; ventrals whitish. 

 Body crossed by four black vertical bands ; the first is under the pro- 

 cumbent spine, the second under the third dorsal spine, the third and 

 fourth under the soft dorsal ; a black spot, representing a fifth band, on 

 lateral line between last rays of dorsal and anal j this is sometimes obso- 

 lete; the position of these bands appears to be subject to slight variation. 



