75. CARANGID^ NAUCRATES. 
443 
sal and anal extending beyond the middle of the fins when depressed. 
Head 4^ in total length; depth, 2|; caudal lobes 4. D. VI — I, 20; A. 
II-I, 17. Florida to Africa. {Giinther.) Kot evidently different from 
the preceding. 
(Cuv. Ya!. viii, 419; Giiutber, ii, 483.) 
aa. Body with vertical dark hands. 
699. T. p;lau€cas Cuv. & Val. 
Bluish, sides golden, with four narrow blackish vertical bands, flie 
first under the first dorsal spine, the second under the fifth, the others 
under the soft dorsal. Dorsal and anal fins falcate, much elevated ante- 
riorlj', reaching beyond base of caudal ; caudal lobes elongate. Head 
3£ ; depth 2. 1). VI-1, 19; A. II-I, 18. Pyloric coeca 13. Tropical 
seas, north to Virginia and Lower California. 
(Cuv. & Val. viii, 400; Giiuther, ii, 433; Holbrook, Ichtli. S. C. 192.) 
226.— NAUC KATES Rafinesque. 
Pilot-Jislies. 
(Nauclerus Cuvier ", young.) 
(Rafinesque, Caratteri di Alcuni Nuovi Generi, &c., 1810, 44: type Naucrates conductor 
Raf. = Gastcrosteus ductor L.) 
This genus differs from Seriola only in the reduction of the spinous 
dorsal to a few (4 or 5) low, unconnected spines. The young {Xauderus 
Cuv.) have the spines of the dorsals connected by membrane, and a more 
or less distinct strong spine at the angle of the operculum. A single 
species, in the open seas, ruler of the ships, i. e. holding shijis 
fast — a name applied by the ancients to Edieneis and other fishes.) 
yOO. N. ductor (Linu.) Raf. — Pilot-fish ; Romero. 
Bluish, with five to seven dark vertical bars. Body rather elongate, 
little compressed. Snout rather blunt. Mouth terminal, oblique, small ; 
maxillary scarcely reaching orbit. Caudal keel large, fleshy; pectorals 
short and broad; ventrals rather large. Head 4 in length; depth 4. 
D. IV — I, 2G ; A. II — 1, 10. In all warm seas ; occasional on our Atlantic 
coast. 
{Gastcrosteus ductor Linn. Syst. Nat. : Xaucratcs noveboracensis Cuv. & Val. viii, 325; 
Gunther, ii, 374.) 
