ANNOTATED LIST OF THE SPECIES 301 
Steindachner, 1882 (1883), Denksch. KK. Akad. Wiss. Wien, XLVI, 12, Rio Huallaga, one 
specimen, 135 mm.; 
Eigenmann and EKigenmann, 1889, Ann. N. Y. Acad. Sci., [V, 432. 
Gasterotomus latior Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 422; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sci. Phila., XCI, 257, three, 101-212 mm., Contamana. 
Peruvian Amazon to Argentina, not coastal rivers, and to Surinam 
15666, 3, 163-181 mm., Lago Sanango, Allen, November, 1920. 
15822, 3, 170-179 mm., Lago Sanango, Allen, November, 1920. 
17863, 3, 184-205 mm., Rio Ucayali, Contamana, Allen, August, 1920. 
17864, 2, 100 and 121 mm., Lago Cashiboya, Allen, August, 1920. 
The species may most readily be separated from laticeps by the fact that in the 
latter the venter is keeled from the origin of the ventral to the base of the anal, in 
latior from the pectoral region to the anal. I question the constancy of the scaled 
line of the predorsal area used in the keys. In most of the specimens of A. laticeps 
the predorsal is naked, but in some of them crowded closely with scales. In 
latior there are areas on the predorsal line in which the scales are rubbed off entirely, 
and in none is there complete scalation there. 
Elongate, compressiform, entire venter trenchant and non-carinate; dorsal 
contours less rounded than in A. laticeps; scales small, thin, ctenoid; anterior 
profile not depressed; air bladder extending beyond the origin of the anal fin. 
The name Yulilla was collected for Stemdachner. 
406. ANODUS ELONGATUS Spix 
Anodus elongatus Spix, 1829, Sel. Gen. et Spec. Pisc. Bras., 57, pl. x1; 
Eigenmann and Higenmann, 1889, Ann. N. Y. Acad. Sei., IV, 411; 
Fowler, 1906 (1907), Proc. Acad. Nat. Sci. Phila., LVIIT, 306, fig. 9; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 420; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sci. Phila., XCI, 251, fig. 51, six specimens, 234-264 
mm., Bajo Ucayali river. 
Curimatus elongatus Cuvier and Valenciennes, 1848, Hist. Nat. Poiss., XXII, 20. 
Elopomorphus elongatus Steindachner, 1880 (1881), Denksch. Kix. Akad. Wiss. Wien, XLIIT, 38. 
Elopomorphus jordani Gill, 1878, Ann. Mag. Nat. Hist., (5), III, 112. 
Anodus steatops Cope, 1878, Proc. Amer. Phil. Soc., XVII, 683, Rio Maranon, Orton collection; 
FKigenmann and Eigenmann, 1889, Ann. N. Y. Acad. Sci., IV, 411. 
The Amazons 
Genus 163: EIGENMANNINA Fowler 
Eigenmannina Fowler, 1906 (1907), Proc. Acad. Nat. Sei. Phila., LVITI, 307; 
Higenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 420. 
Type: Anodus melanopogon Cope 
Orinoco and Peruvian Amazon 
May be known for the extremely large head and opercle; dorsal profile de- 
cidedly concave; mandible strongly produced, mouth superior; eye dorsal to the 
center of the head; body heavy at the shoulder, tapering caudally. 
