PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 205 
GENUS 4.—SELENE La Cépéde. 
SELENE, La Cépéde, Hist. Nat. Poiss., iv, 560, 1803 (argentea). 
ARGYREIOSUS La Cépéde, Hist. Nat. Poiss., iv, 566, 1803 (vomer). 
SELENE Liitken, Spolia Atlantica, 1880, 124. 
Type SELENE ARGENTEA La Cépéde=adult of ZEuS VOMER L. 
We separate this genus from Caranx on the character, certainly of 
little value, of the entire absence of bony scutes. Two species are 
known. The variations depending on age are in this group extreme. 
ANALYSIS OF SPECIES OF SELENE. 
a. Dorsal with about 18 soft rays; anal with about 15; anterior profile of head 
curved; bones ot head lower and less oblique than in S. vomer.--. - OERSTEDI, 27. 
ad. Dorsal with about 23 soft rays; anal with about 18; anterior profile of head, from 
base of snout to occiput almost perfectly straight.........-.--.------ VoMER, 28. 
27. Selene oerstedi Liitken. 
Selene oerstedi Liitken, Spolia Atlantica, 1880, 144 (Punta Arenas). 
Habitat.—Pacifice coast of tropical America. 
Liitken’s type came from Punta Arenas. Specimens have been ob- 
tained by Professor Gilbert at Mazatlan and at Panama. 
28. Selene vomer (Linnus) Liitken.—Moon-jish; Jorobado; Horse-fish; Look-down ; 
Horse-head. 
Zeus vomer Linnzeus, Syst. Nature and elsewhere (young). 
Argyreiosus vomer La Cépede, iv, 566, 1863; C. & V., ix, 177; Giinther, ii, 458; 
Gill, Proc. Ac. Nat. Sci. Phila., 1862, 437, and elsewhere, and of most 
recent writers. 
Selene vomer Liitken, Spolia Atlantica, 1880, 547 (with figures showing the 
changes undergone with age); Jordan & Gilbert, Syn. Fish. N. A., 439. 
Zeus niger Bloch & Schneider, Syst. Ichth., 1801, 98 (confounded with Poma- 
canthus arcuatus). 
Selene argentea La Cépéde, iv, 560, 1803, pl. 9, f. 2 (adult); Brevoort, Ann. 
Lye. Nat. Hist. N. Y., v, 68, pl. 4, 1853; Gill, Proc. Ac. Nat. Sci. Phila., 
1862, 456; Poey, Enum. Pisc. Cubens., 80; and of various authors. 
Zeus capillaris Mitchill, Trans. Lit. & Phil. Soc., 1, 383, 1815 (young). 
Argyriosus capillaris Gill, Proc. Ac. Nat. Sci. Phila., 1862, 437. 
Zeus rostratus Mitchill, 1. ¢., 384 (young). 
Zeus geometricus Mitchill, Amer. Monthly Mag., 1818, ii, 245 (adult). 
Argyriosus triacanthus, jfilamentosus, and setifer Swainson, Nat. Hist. Classn. 
Fish., 1839, 250, 407, 409 (young). 
Argyriosus mauricet Swainson, l. c., 408 (adult). 
Argyriosus mitchilli De Kay, N. Y. Fauna Fish., 1842, 126 (young). 
Argyriosus spixi Castelnau, Anim. Nouv. Rares, 23 (adult). 
; Argyriosus brevoorti Gill, Proc. Ac. Nat. Sci. Phila., 1863, 83 (Panama; young). 
Argyreiosus pacificus Lockington, Proc. Ac. Nat. Sei., 1876, 84 (Lower Cal- 
ifornia; adult). 
_ Habitat.—Tropical Ameriea, on both coasts; Cape Cod to Brazil; 
Lower California to Peru. 
Our observations of this species tend to confirm the correctness of 
