ANNOTATED LIST OF THE SPECIES 315 
Of extremely wide distribution, from the Chagres of Panama to the Guianas, the 
Paraguay, Peru 
15993, 5, 55-214 mm., brooks, ponds near Iquitos, Allen, September, 1920. 
15418, 4, 86-126 mm., creek, Yurimaguas, Allen, November, 1920. 
Genus 174: EIGENMANNIA Jordan and Evermann 
Sternopygus (in part) Miller and Troschel, 1849, Horae Ichth., III, 13. 
Cryptops Eigenmann, 1894, Ann. N. Y. Acad. Sei., VII, 626, preoccupied. 
Eigenmannia Jordan and Evermann, 1896, Bull. U.S. Nat. Mus., I, 341; 
Eigenmann and Ward, 1905, Proc. Wash. Acad. Sci., VII, 171; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 449; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 429; 
Ellis, 19183, Mem. Carnegie Mus., VI, 125. 
Type: Sternopygus humboldtii Steindachner 
Pacific slopes of Panama to La Plata 
Both jaws bearing patches of teeth; snout short; caudal fin not present and tail 
extending beyond the anal fin, slender, cylindrical, pointed; eye without free orbital 
margin; scales cycloid; lateral line not broken or discontinued. 
KEY TO THE SPECIES OF THE GENUS EIGENMANNIA 
a. Caudal filament less than half the length of anal fin 
b. Head of moderate length, 7.0-10.5 in the length; anal fin 185-224 
c. Eye large, 3.33-5.0 in the head; maxillary equal to diameter of eye... ... virescens 
ec. Eye small, 8.0-9.0 in the head; maxillary twice the eye diameter........ troscheli 
bb. Head short, 12.0-12.25 in the length; anal fin 239-259.................. conirostris 
aa. Caudal filament equal to half the total length without the head; eye larger than the maxillary; 
eA) Sb ee tO (ALO A tsetse ytacc erate sri2e8 2, core gm Ay PS ND Le Soe See macrops 
(extralimital) 
438. EIGENMANNIA VIRESCENS (Valenciennes) 
Sternarchus virescens Valenciennes, 1847, in d’Orb. Voy. Amér. Merid., V, 11, pl. xiii, fig. 2. 
Sternopygus virescens Miller and Troschel, in Schomburgk, 1848, Reisen, IIT, 640; 
Kaup, 1856, Cat. Apod., 137; 
Giinther, 1868, Proc. Zool. Soc. London, 229, Xeberos; 
Giinther, 1870, Cat. Fish. Brit. Mus., VIII, 7; 
Cope, 1870, Proc. Amer. Phil. Soc., XI, 570, Pebas; 
Cope, 1871, Proc. Acad. Nat. Sci. Phila., XXIII, 257, R. Ambyiacu; 
Cope, 1878, Proc. Amer. Phil. Soc., XVII, 682, Peruvian Amazon; 
Eigenmann and Eigenmann, 1891, Proc. U.S. Nat. Mus., XTV, 62. 
Eigenmannia virescens Jordan and Evermann, 1896, Bull. U.S. Nat. Mus., I, 341; 
Eigenmann and Norris, 1901, Rev. Mus. Paulista, LV, 549; 
Eigenmann and Ward, 1905, Proc. Wash. Acad. Sci., VII, 172; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 449; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 480; 
Ellis, 1913, Mem. Carnegie Mus., VI, 127; 
Fowler, 1939 (1940), Proce. Acad. Nat. Sei. Phila., XCI, 276, one, 335 mm., Contamana. 
Rio Magdalena to Amazons, Rios Sdo Francisco, La Plata 
15423, 2, 146 and 170 mm., creek, Yurimaguas, Allen, November, 1920. 
