THE GYMNOTID EELS OF TROPICAL AMERICA. 137 
VII. Ruampuicutuys Miiller and Troschel. 
Gymnotus LinNaus (in part), Syst. Nat., ed. XII, i, 427, 1766. 
Rhamphichthys MGLLER AND TroscHeEn, Hore Ichthyol., IIT, 15, 1849. 
Type, Gymnotus rostratus Linnzeus. 
With fontanels; no caudal; snout long; size moderate to quite large; body very 
elongate and quite compressed; head moderate, tapering into a long, tubular 
snout; gape short; mouth small; eyes moderately small and covered by a trans- 
parent membrane. Scales eycloid and minute; lateral line complete, straight; 
origin of the anal in front of the vertical from the gill-opening; caudal appendage 
large and sealy. 
Fic. 8. Rhamphichthys rostratus (Linneus). 
11. Rhamphichthys rostratus (Linnzeus). 
SeBa, Thesaur., II, tab. 69, fig. 3, and III, 99, tab. 32, fig. 5. 
Gymnotus Gronovius, Mus. Ichthyol., no. 73, 1754; id., Zoophyl., No. 167. 
Gymnotus rostratus Linnaus, Syst. Nat., ed. XII, i, 428, 1766; BLocu anp 
SCHNEIDER, 522, tab. 106, 1801; Gronow, Syst., ed. Gray, 22, 1854. 
Carapus rostratus Cuvier, Régne Animal, II, 237, 1817. 
Rhamphichthys rostratus MULLER AND TroscHEeL, Hore Ichthyol., III, 15, 1849 
(Guiana); GUNTHER, Cat., VIII, 5, 1870 (Surinam); EIGENMANN AND EIGEN- 
MANN, Proc. U. 8. Nat. Mus., XIV, 1891, 62; EIGENMANN AND WARD, Proc. 
Wash. Acad. Sci., VII, 1905, 168 (Guianas to Amazon); von IHERING, Os 
Peixes do Brazil, Part 1 A, 1907; Eraknmann, Repts. Princeton Univ. Exp. 
Patagonia, III, 1910, 449 (Guianas and Amazon). 
Gymnotus longirostris LACEPEDE, Hist. Nat. Poiss., II, 178, 1800. 
Rhamphichthys schomburgkui Kaur, Apod., 135, 10, 1856; SrernpAcHNER, Die 
Gymnotide, 10, 1868 (Rio Negro). 
Rhamphichthys marmoratus CASTELNAU, Anim. Amer. Sud. Poiss., 86, pl. 46, 
fig. 2, 1855 (Uruguay); Kaup, Apod., 132, fig. 7, 1856; EIGENMANN AND EIGEN- 
MANN, Proc. U. 8. Nat. Mus., XIV, 1891, 62; Eriaenmann, Ann. N. Y. Acad. 
Sci., VII, 1894, 625 (Itaituba) ; EIGENMANN AND Warp, Proc. Wash. Acad. Sci., 
VII, 1905, 168 (Orinoco and Guianas to Rio de la Plata); E1GENMANN AND 
BEAN, Proc. U.S. Nat. Mus., XX XI, 666, 1907 (Lower Amazon); EIGENMANN, 
Repts. Princeton Univ. Exp. Patagonia, III, 449, 1910 (Guiana, Orinoco to 
Rio de la Plata). 
