1376 Bulletin //, United States National Museicm. 



yellow. Panama; only the original type, 5 J inches long, known, (aureo- 

 lu8, gilded.) 



Gerres aureolus, Jordan & Gilbert, Bull, i, IT. S. Fish Conim. 1881 (1882), 328, Panama 

 (Coll. C. H. Gilbert) ; Evermann & Meek, I. c, 266. 



1762. GERRES PERUVIAXUS, Cuvier & Valenciennes. 



(MOJARRA DE LAS AlETAS AmARILLAS.) 



Head 3; depth 2^. D. IX, 10; A. Ill, 8; eye 3 in head, snout slightly 

 shorter ; pectoral equaling head ; ventrals 1^ ; second dorsal spine 1 ,'j ; second 

 anal spine li. Body rhomboidal, short and deep, with angular outlines. 

 the depth usually about half length; preopercle finely serrate; edge of 

 preorbital entire; spines long and slender; second dorsal spine, when 

 depressed, reaching to the base of the third or fourth dorsal ray ; posterior 

 outline of spinous dorsal deeply concave; i)ectoral long and falcate, reach- 

 ing past front of anal ; second and third anal spines about equal in length, 

 longer than the soft rays, and when depressed, reaching past tip of last 

 ray; ventral spine reaching vent, the rays reaching midway between vent 

 and anal spines. Premaxillary groove broad, triangular or oval, and free 

 from scales. Color silvery, without dark streaks or bars ; fins pale ; caudal 

 and anal yellow. Pacilic coast of tropical America ; very common ; knoAvn 

 from Mazatlau, Salina Cruz, Chiapas, Panama, Payta, and Guayaquil. 

 Length 5 to 8 inches. 



Gerres peruviamis, Cdvier & Valenciennes, Hist. N.at. Poiss., vi, 467, 1830, Payta, 



Northern Peru; Evermann & MEEK, I. c, 266. 

 Gerres hrevirostris* Sauvage, Bull. Soc. Philom. P.aris, in, 1879, 208, Rio Guayas, Equador. 



(Coll. Andre.) 



1763. GERRES OLlSTHOSTOMUS,t Goode & Bean. 



(Irish PoMPANO; Mutton Fish.) 



Head 3 ; depth 2. D. IX, 10 ; A. Ill, 8 ; scales 5-37-9. Body rhomboid, short 

 and deep, the back elevated, tlie anterior profile short and very steep ; mouth 

 rather large; teeth slender, brush-like; preorbital entire ; preopercle and 

 interopercle serrate ; groove on top of head, for reception of premaxilla- 

 ries broad, rounded behind, with a median linear depression, its surface 



* Gerres hrevirostris is thus described: 



"D. IX, 10; A. Ill, 8; L. lat. 40; L. trans. ^\. Hauteur du corps contenue deux fois 

 dans la longueur, caudale non comprise; longueur de la tf^tetrois fois etdemi dans la nienie 

 dimension. Ligue rostro-dorsale tres-incliuce, conime dans la (irrri's plii inivri. Museau 

 obtus, plus court que I'feil, dont le diamctre est compris troi.s luis (bins la longueur deia 

 tete; espace intororbitairemoius large que Twil. Processus t\v 1 intfrmaxillMircdcpourvu 

 d'ecailles ct sc iinilnni^iaiit iirc'sfiue ius(iu':iu niveau ilii bm-d posterieur de I'reil. Deuxi- 

 emeet truisicinr i jiincs ilor.salcs dr nicii!c liaiiti ur, aussi liauti-s (|uela distance qui.separe 

 rextreniitc dii iiiiisraii dii liord du iircci|ifr<iili', a\ ant la iixii tit- de la hauteur du corps. 

 Deuxicmc ef troisirinc cpiiicH anales prcsquo dc uiciiic hauteur, plus courtes que la se.conde 

 6pine dorsale. Caudale fortcment ccliancree. Pectorales arrivant presque h I'anale. 

 Coloration tinifovme. Voisinedu Gerres rhombetis, cetteespece s'en distingue par le profll 

 rostro-dorsal encore plus incline et par la po.sition de I'oeil, entamant cette ligue rostrale. 

 liio Guayas (Equateur) : Andre." (Sauvage.) 



t Very close to Gerres olisthostomus is the species described from Brazil under the name 

 of Diapterus auratus. Eanzani's figure shows a long-pointed snout, longer than eye; 

 back elevated ; headSJ; depth2; eyeinheadSg; second dorsal spine ]i; second anal spine 

 2i, shorter than third; pectoral reaching second anal spine, slightly longer than head; 

 caudal slightly shorter thaa head; scales 41. D. IX, 10; A. Ill, 8. 



