THE GYMNOTID EELS OF TROPICAL AMERICA. 117 



is sometimes a little irregular) in each jaw; eyes small and covered by a membrane, 

 without free orbital margin; scales cycloid and very small; lateral line complete 

 and paralleling the main axis of the body; pectorals small; anal long, its origin 

 back of the vertical from the tip of the pectoral. 

 A genus of a single species. 



Fig. 2. Gymnolus carwpo Linneeus. 



2. Gymnotus carapo Linnseus. 

 Caravo Marcg., Hist. Pise, 170; Willoughby, Hist. Pise, 115, tab. G 7, fig. 4. 

 Gymnotus Seba, Thesaur., Ill, tab. 32, fig. 1. 



Gymnotus carapo Linn^us, Syst. Nat., ed. X, 246, 1758; idem, ed. XII, i, 427, 

 1766; Block, V, 59, tab. 157, fig. 2; Gronow, Syst., ed. Gray, 22, 1854; 

 Gill, Proc. Acad. Nat. Sci., Phila., 151, 1864; Miller, Bull. Am. Mus. Nat. 

 Hist., Vol. XXIII, 1907 (Los Amates and Puerto Barrios, Guatemala); 

 EiGENMANN AND Bean, Proc. U. S. Nat. Mus., Vol. 31, 666, 1907 (Amazon); 

 Meek, BuU. Field Mus. (Zool. Series Pub. No. 124), Vol. VII, No. 5, 1907 

 (Los Amates and Lake Amatitlan, Guatemala); idem, Bull. Field Mus. (Zool. 

 Ser. Pub., 127), Vol. VII, No. 6, 1908 (Lake Amatitlan, Guatemala). 

 Gymnotus fasciatus Pallas, Spicil. Zool., VII, 35; Schomburgk, Fishes of Guiana, 



184, pi. 19, 1843 (Rio Branco). 

 Carapus fasciatus Cuvier, Regne Animal, ed. I, 237, 1817; MtJLLER and Troschel, 

 Hor£e IchthyoL, III, 13, 1849; Castelnau, Anim. Amer. Sud., 85, 1855 

 (Amazon); Kaup, Apod., 139, 1856; Steindachner, Die Gymnotida;, 13, 

 1868 (Caigara, Cuyaba, Marabitanos, Surinam, Matto Grosso); Gijnther, 

 Cat., VIII, 9, 1870 (Capim, Bahia, Surinam, British Guiana, Essequibo, 

 Berbice, Trinidad, Is. Grenada, Rio Motagua); Hensel, Wiegm. Archiv, 

 89, 1870 (Guahyba, Porto Alegre); Cope, Proc. Am. Philos. Soc, 1870, 570 

 (Pebas); Cope, Proc. Acad. Nat. Sci. Phila., 1871 (1872), 257 (Ambyiacu); 

 LtJTKEN, Velhas Flodens Fiske, 247, and XIX, 1874 (Rio das Velhas; Lagoa 

 Santa and Rio San Francisco); Cope, Proc. Am. Philos. Soc, 1878, 682 

 (Peruvian Amazon); Boulenger, Proc. Zool. Soc, 1887, 282 (Canelos); 

 Eigenmann and EiGENMANN, Proc U. S. Nat. Mus., XIV, 1891, 62; Perugia, 



