900 Bulletin 47, United States National Museum. 



412. NAUCRATES, Rafinesque. 



(PILOT-FISHES.) 



Centronolus, LACfiPEDE, H J st. Nat. Poiss., in, 311, 1802, (conductor); not Centronotus of BLOCK & 



SCHNEIDER, 1801, which is Pholis. 



Naucrates, RAFINESQUE, Caratteri di Alcuni Nuovi Generi, &c., 1810, 44, (conductor). 

 Pompldlus, MINDING, Lehrb. Nat. Fische, 108, 1832, (ductor). 



Nauclerus, CUVIER & VALENCIENNES, Hist. Nat. Poiss., 247, 1833, (compresms ; young). 

 Xystophorus, RICHARDSON, Voyage Erebus and Terror, 52, 1844 ; very young. 



This genus differs from Seriola only in the reduction of the spiuous 

 dorsal to a few (4 or 5) low, unconnected spines. The young, called 

 Nauclerus and Xysfophorus, 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 pelagic species widely distributed in the open seas. 

 (vav\parr]^j ruler of the ships, i. e., holding ships fast a name applied by 

 the ancients to Echeneis and other fishes.) 



1287. NAUCRATES DUCTOR, Linnams. 

 (PILOT-FISH ; ROMERO.) 



Head 4; depth 4. D. IV-I, 26; A. II-I, 16. Body rather elongate, 

 little compressed. Snout rather blunt ; mouth terminal, oblique, small ; 

 maxillary scarcely reaching orbit. Caudal keel large, fleshy ; pectorals 

 short and broad; veutrals rather large. Bluish, with 5 to 7 broad dark 

 vertical bars, extending on the fins. Length 2 feet. A pelagic fish found 

 in all warm seas ; occasional on our Atlantic Coast from Cape Cod to the 

 West Indies; not common in markets or in collections, (ductor, leader.) 

 (En.) 



Gaslerosteus ductor, LINNAEUS, Syst. Nat., Ed. x, 295, 1758, "in Pelago." 



Naucrales ductor, GUNTHER, Cat., n, 374, 1860 : JORDAN & GILBERT, Synopsis, 443, 1883 ; GILL, 



J'roc. U. S. Nat. Mus., 1882, 490. 



Gasterosteus antecessor, PALDORF, Skriv. Nat. Selskab. Kjob., n, 166, 1800. 

 Scomber kailreuteri, BLOCK & SCHNEIDER, Syst. Ichth., 570, 1801. 

 Centronolus conductor, LACEPEDE, Hist. Nat. Poiss., in, 311, 1802, no locality. 

 Naucrates fanfarus, RAFINESQUE, Caratteri, 1810, 45, Sicily. 

 Naucrates indicus, LESSON, Voy. Coquille, 157, 1829, India. 



Naucrates noveboracensis, CUVIER & VALENCIENNES, Hist. Nat. Poiss., vm, 325, 1831, New York. 

 Seriola dusmmieri, CUVIER & VALENCIENNES, /. c., ix, 217, 1833, Gulf of Bengal. 

 Seriola succincta, CUVIER & VALENCIENNES, I. c., ix, 218, 1833, south of St. Helena. 

 Nauclerus compressus, CUVIER & VALENCIENNES, I. c., ix, 249, 1833, Molucca. 

 Nauclerus abbreviatus, CUVIER & VALENCIENNES, I. c., ix, 251, 1833, Atlantic Ocean. 

 Nauclerus brachycentrus, CUVIER & VALENCIENNES, I. c., ix, 253, 1833, Indian Ocean. 

 Nauclerus triacanthus, CUVIER & VALENCIENNES, I. c., ix, 253, 1833, Atlantic Ocean. 

 Nauclerus annularis, CUVIER & VALENCIENNES, I. c., ix, 254, 1833, south of St. Helena. 

 Nauclerus leucunu, CUVIER & VALENCIENNES, I. c., ix, 2">5, 1833, south of St. Helena. 

 Naucrates cyanophrys, SWAINSON, Classn. Fishes, n, 412, 1839, Palermo. 

 Naucrates serratus, SWAINSON, I. c., 413, 1839, Palermo. 

 Tliynnus pompilus, GRONOW, Cat. Fishes, 123, 1854, Palermo. 

 Xystophorus, RICHARDSON, Voy. Erebus and Terror, 52, 1844, Palermo. 



