06 U. S. BUREAU OF FISHERIES 



663. Compsura gorgonae (Evermann and Goldsborough). 



Both slopes of Panama. 



Chcirodon gorgonie Evermann and rioldsl:)orough, Proc. Biol. Soc. 



Wash., XXil, 1909, 99, figs. 1, 3, Gorgona, Atlantic slope, Panama 



Canal Zone. 



Genus 249. PSEUDOCHEIRODON Meek and Hildebrand. 



Pseudochcirodon Meek and Hildebrand, Field Mus. Nat. Hist., Zool., 

 X, 1916, 275 (P. affinis .Meek and Hildebrand). 



664. Pseudocheirodon afRnis Meek and Hildebrand. 



Both sloi)es of Panama. 



Chcirodon insignia Evermann and Goldsborough, Proc. Biol. Soc. Wash., 



XXII, 1909, 98, Tabernilla, Atlantic slope; not of Steindachner. 

 Pseudocheirodon a(rinis Meek and Hildebrand, Field Mus. Nat. Hist., 



Zool., X, 1916, 275, PI. XVIII, Rio Gatun, Monte Liria, Canal Zone. 



Panama. 



Genus 250. GEPHYROCHARAX Eigenmann. 



(icphyrocharax Eigenmann, Indiana Univ. Studies, No. 16, 1912, 23 

 {G. chocoensis Eigenmann). 



665. Gephyrocharax atricaudatus (Meek and Hildebrand). 



Both slojjcs. Canal Zone, Panama. 



DcuUrodoH atricaiidala Meek and Hildebrand, Field Mus. Nat. Hist., 



Zool., X, 1912, 68, llio Frijolcs, Canal Zone. 

 (icphyrocharax atricaudata Eigenmann, Indiana Univ. Studies, No. 20, 



1914, 41, Panama Canal Zone. 



666. Gephyrocharax intermedius Meek and Hildebrand. 



Rio Chama, Panama. 



(icphyrocharax intermedius Meek and Hildebrand, Field Mus. Nat. 

 Hi.st., Zool., X, 1916, 278, Rio Chama. 



Genus 251. ASTYANAX Baird and Girard. 



Astyanax Baird and Girard, Proc. Acad. Nat. Sci. Phila., VII, 1854, 

 26 {A. argentatus Baird and Gn'SLvd — Tctragonopterus mexicanus 

 Filippi). 



Pa^cilurichthys Gill, Ann. Lye. Nat. Hist. N. Y., VI, 1858, 417 (P. 

 brevoorti Gill). 



All the species mentioned below l^elong to the subgenus or genus As- 

 tyanax, distinguished from Tetragonapienes Cuvier by the absence 

 of teeth on the maxillary and by the shorter anal of less than 40 rays. 



667. Astyanax mexicanus (Filippi) . 



Rio Balsas and Rio Tehuacan to tributaries of the Rio Grande in Texas, 



the northernmost species of the multitude of Characins. 

 Tetragonopterus mexicanus Filippi, Guerin's Rev. Mag. Zool., 1853, 166, 



Mexico. 

 Astyanax argentatus Baird and Girard, Proc. Acad. Nat. Sci. Phila., 



VII, 1854, 27, Comanche Spring and Brownsville, Tex. 

 Tetragonopterus fulgens Bocourt, Ann. Sci. Nait. Zool., IX, 62, 1868. 

 Tetragonopterus nitidus Vaillant and Pellegrin, Bull. Mus. Hist. Nat. 



Paris, 1904, 324. 

 Tetragonopterus brevimanus Giinther, Cat., V, 1864, 325, Yzabel; Rio 



San Geronimo, Guatemala. 



668. Astyanax aeneus (Giinther). 



Oaxaca, Mexico, and Rio Chagres, and other streams about Panama, 



south to Brazil. 

 Tetragonopterus aeneus Giinther, Proc. Zool. Soc. Lond., 1860, 319, 



Oaxaca, Mexico, 

 Tetragonopterus Tuicrophthalmus Giinther, Cat., V, 1864, 324, Lake 



Amatitlan, Guatemala; Rio Rimac. 

 Tetragonopterus panamensis Giinther, loc. cit., 324, Pacific coast of 



Panama; Yzabel. 

 Tetragonopterus humilis Giinther, loc. cit., 327, Lake Amatitlan, 



Guatemala. 

 Tetragotioptcrus a-rstcdi Krdyer, in Liitkin, let. Bidrag., Ill, 1874, 229, 



Rio San Juan, Nicaragua. 



