322 FISHES OF WESTERN SOUTH AMERICA 
Eigenmann and Eigenmann, 1891, Proc. U. 8. Nat. Mus., XIV, 62; 
Eigenmann and Ward, 1905, Proc. Wash. Acad. Sci., VII, 163; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, HI, 448; 
Ellis, 1913, Mem. Carnegie Mus., VI, 149, fig. 13; 
Fowler, 1915, Copeia, no. 15, Peruvian Amazon; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sei. Phila., XCI, 277, one specimen, 308 mm., Con- 
tamana. 
Lower and middle Amazons, Rio Ucayali 
449, APTERONOTUS HASEMANTI Ellis 
Sternarchus hasemani Ellis, 1913, Mem. Carnegie Mus., VI, 147, pl. xxi, fig. 1; 
Pearson, 1937a, Proc. Cal. Acad. Sei., (4), XXIII, 92, Tingo de Pauca and Paipay, upper 
Maranon. 
Known from Santarem and from upper Maranon; Iquitos. 
15425, 2, 294 and 318 mm., Iquitos, Morris, 1922. 
Genus 179: STERNARCHELLA Eigenmann and Ward 
Sternarchella Eigenmann and Ward, 1905, Proc. Wash. Acad. Sci., VII, 163; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, HI, 448; 
Ellis, 1913, Mem. Carnegie Mus., VI, 150. 
Type: Sternarchus schotti Steindachner 
Barro do Rio Negro to Peru 
Short-snouted; gape short, not reaching beyond posterior naris; eyes small, 
covered, nearer tip of snout than to end of the opercle; small teeth in both jaws; 
scales moderately large and cycloid. 
450. STERNARCHELLA SCHOTTI (Steindachner) 
Sternarchus schotti Steindachner, 1868, Sitzb. Kk. Akad. Wiss. Wien, LVIII, 4, pl. i, figs. 1 and 2; 
Giinther, 1870, Cat. Fish. Brit. Mus., VIII, 3; 
Cope, 1878, Proc. Amer. Phil. Soc., XVII, 682, Peruvian Amazon; 
Eigenmann and Eigenmann, 1891, Proc. U. 8S. Nat. Mus., XIV, 61. 
Sternarchella schottt Kigenmann and Ward, 1905, Proc. Wash. Acad. Sci., VII, 164; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 448; 
Ellis, 1913, Mem. Carnegie Mus., VI, 151, fig. 14; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sei. Phila., XCI, 277, one, 190 mm., Contamana. 
Solimoes and Marafion systems, and Ucayali river 
Genus 180: POROTERGUS Ellis 
Porotergus Ellis, 1912, in Kigenmann, Mem. Carnegie Mus., V, 440; 
Ellis, 1913, Mem. Carnegie Mus., VI, 152. 
Type: Porotergus gymnotus Ellis 
Peruvian Amazon, Santarem, Rio Essequibo 
May be known for the want of scales along the back to a point more or less 
beyond the origin of the dorsal filament; scales along the lateral line of large size; 
