2848 Bulletin 4.7, United States National Museum. 



its lobe much elongated, extending to middle of caudal ; lobe of anal reach- 

 ing to below base of caudal; caudal lobes equal, 2^ in body; pectoral 

 rounded, 1| in head ; veutrals 2f in he.ad. Scales minute, large posteriorly 

 near lateral line. Pale olive above, becoming silvery on belly; lobes of 

 vertical fins dusky. This West Indian species is apparently different from 

 the northern Trachinotus falcatus with which it has been confounded. 

 Trachinotus falcatits seems to be confined to the coasts of the United 

 States. In specimens of the same size the vertical fins are much higher 

 in the West Indian species, (ponfios, rhomb; eid&s, resemblance.) 

 Ghcetodon rhomboides, BLOCH. Ichth., 1787, pi. 209, Martinique. 

 Page 945. After Tracliinotns paloma insert: 



428(a). ZALOCYS, Jordan. & McGregor. 

 Zalocys, JORDAN & MCGREGOR, Kept. U, S. Fish Comm. 1898 (stilbe). 



This genus is closely allied to Hypodis, Rafinesque (=Lichia, Cuvier), 

 differing in the absence of a procurreut spine before the dorsal, and in the 

 cultrate thoracic region. From Tracliinotns it is distinguished by the same 

 characters and also by the lower forehead and nonfalcate dorsal and anal 

 fins. Hypodis is scarcely different from Trachinotus, the only tangible 

 characters being the larger teeth, the low dorsal, and the less elevated 

 forehead. Porthmeus, Cuvier (= Lichia amla and L. radigo) is a well-defined 

 genus, distinguished by the large mouth and projecting lower jaw. 

 surge of the sea; dnvz, swilt.) 



1344 (a). ZALOCYS STILBE, Jordan & McGregor. 



Head 4; depth 2$. D. VI-I, 26; A. II-I, 23. Body elliptical, deeper 

 than in Hypodis glaucua; belly sharply compressed ; ventral outline similar 

 to that of dorsal; anterior profile of the head elevated and sharp, the eye 

 being rather below than above its middle ; eye 5 in head, with conspicu- 

 ous adipose eyelid before and behind ; posterior nostril much larger than 

 anterior; vertically oblong maxillary broad, without supplemental bone, 

 extending to pupil, 2$ in head. Mouth moderate, oblique; each jaw with 

 bands of villiform teeth ; similar teeth on vomer, palatines, and tongue. 

 Preopercle very broad; cheek moderate; suborbital narrow; preorbital 

 very narrow, 4 in eye. No pseudobranchire. Gill rakers very long and 

 slender, numerous. No procumbent spine before dorsal ; spines low and 

 separate, progressively higher ; soft dorsal and anal each with a sheath of 

 scales; first rays of dorsal very slightly elevated, 2 in head; anal without 

 distinct anterior lobe, longest ray 2f in head ; caudal peduncle long and 

 slender; depth 3| in head; length below 2 in head; caudal fin widely 

 forked ; lobes long and slender, upper a little the longer, more than | 

 longer than the head and 2| in body; pectoral moderate, 1 in head; 

 ventrals very small, 6* in head ; snout 3f in head ; premaxillary protractile. 

 Color dark steel blue or blackish above ; lower parts soiled white ; axil 

 and base of pectoral within jet-black ; dorsal and anal each with a narrow 

 whitish edging; caudal black, each lobe with a narrow whitish edging 

 within. Body covered with small smooth scales, much as in Trachinotus; 



