936 Bulletin 47, United States National Museum. 



Panama; not common. Here described from an adult example taken at 

 Mazatlan. (Named for Professor 0rsted of Copenhagen, its discoverer.) 



Selene arstedii, LVTKEN, Spolia Atlantica, 144, 1880, Punta Arenas. 

 Selene cerstedii, JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1883, 205. 



1332. SELENE VOMER (Linnaeus). 

 (MOONFISH ; JOROBADO ; LOOK DOWN; HORSEHEAD.) 



Head 3; long dorsal rays 2; pectoral 2f ; long anal rays 2; depth H, 

 the young much deeper. D. VII -1, 23 ;* A. II-1, 18. Anterior profile from 

 tip of snout to occiput almost perfectly straight in the adult. Diameter 

 of eye, length of opercle, and distance from eye to profile about equal ; 

 eye 2 in maxillary, 2i in preorbital ; mandibles very deep, the dentary 

 bones thin, approximate ; one or two of the dorsal spines greatly elongate 

 and filamentous in the young, short in the adult ; ventrals variable in 

 length, usually about as long as the eye in the adult, variously elongate 

 in partly grown specimens. Color uniform silvery in the adult. Our 

 observations of this species tend to confirm the correctness of Dr. Liitken's 

 views (Spolia Atlantica, 139) as to the transformations incident to its 

 growth. Tropical America, on both coasts, from Cape Cod to Brazil, and 

 from Lower California to Peru. Very common southward on. sandy 

 shores, both in the Atlantic and Pacific. The Pacific Coast form, bre- 

 voortii=pacijicus, is not evidently different from Selene vomer. (vomer, 

 a plowshare.) 

 '/jeus vomer, LINNTF.US, Syst. Nat., Ed. x, 1758, 266, America; after Zeus cauda bifurca of LIN- 



N-ffiUS, Mus. Adolph-Fred., i, 66. 

 Anjyreioms vomer, LACEPKDE, Hist. Nat. Poiss., iv, 566, 1803; GILL, Proc. Ac. Nat. Sci. Phila., 



1862, 437, and elsewhere. 

 Selene romer, CUVIEB & VALENCIENNES, Hist. Nat. Poiss., ix, 177, 1833; GUNTHER, Cat., n, 458, 



1860; LVTKEN, Spolia Atlautica, 1880, 547, (with figures showing the various changes under- 

 gone with age); JORDAN <fc GILBERT, Synopsis, 439, 1883; BREVOORT, Ann. Lye. Nat. Hist. 



N. Y., v, 68, pi. 4, 1853; GILL, Proc. Ac. Nat. Sci. Phila., 1862, 436; JORDAN & GILBERT, 



Proc. U. S. Nat. Mus., 1883, 205. 

 Zeus gallus, LINNAEUS, Syst. Nat., Ed. x, 1758, 267, America; after Zeus cauda bifurca of ARTEDI; 



confused with Alectis ciharis. 



Zeus nicjer, BLOCK & SCHNEIDER, Syst. Ichth., 98, 1801, (confounded with Pomacanlhus arcuatus). 

 Selene argenlea, LACEPEDE, Hist. Nat. Poiss., iv, 560, pi. 9, fig. 2, 1803, (adult). 

 Zeus capillaris, MITCHILL, Trans. Lit. & Phil. Soc., 1, 1815, 383, (young), New York. 

 Argi/riosis capillaris, GILL. Proc. Ac. Nat. Sci. Phila., 1862, 437. 

 Zeus rostratus, MITCHILL, I. c., 384, New York, (young). 



Zeus geomelricus, MITCHILL, Amer. Monthly Mag., n, 1818, 245 (adult), New York. 

 Argyriosus iriacantkus, SWAINSON, Nat. Hist. Class'n Fish., 1839, 250, Brazil; after SPIX & AGAS- 



siz, pi. 58, (young). 



Argyrioaus filamcntoxus, SWAINSON, I. c., 250; afler CUVIER & VALENCIENNES, pi. 255. 

 Argyriosm setifer, SWAINSON, 1. c., 409; after CUVIER & VALENCIENNES, pi. 255, substitute for 



vomer and filamenloms. 



Argyriosus mauricei, SWAINSON, I. c., 408, Brazil, (adult). 



Argyriosus mitchilli, DF. KAY, N. Y. Fauna: Fishes, 1842, 126, (young), New York. 

 Argi/riosus spixii, CASTELNAU, Anim. Nouv. Rares, 23, 1855, (adult). 

 Argyriosus brevoorli, GILL, Proc. Ac. Nat. Sci. Phila., 1863, 83, Panama, (young). 

 Argyreiosus paciftcm, LOCKINGTON, Proc. Ac. Nat. Sci. Phila., 1876, 84, Lower California, 



(adult). 



* D. I, 20 to 22; A. I, 17 or 18, in Pacific Coast specimens = Selene brevoortii (Gill). 



