262 FISHES OF WESTERN SOUTH AMERICA 
330a. CHALCINUS ANGULATUS VITTATUS Garman 
Chalcinus angulatus vittatus Garman, 1890, Bull. Essex Inst., XXII, 1-7; 
Kigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 440. 
The Amazons 
15749, 7, 172-226 mm., Lago Sanango, Allen, November, 1920. 
331. CHALCINUS ALBUS (Cope) 
Triportheus albus Cope, 1871 (1872), Proc. Acad. Nat. Sci. Phila., XXIII, 264, pl. viii, fig. 3; pl. 
xiv, fig. 2, Rio Ambyiacu, Hauxwell. 
Chalcinus albus Fowler, 1906 (1907), Proc. Acad. Nat. Sci. Phila., LVIIT, 447, Ambyiacu, Hauxwell 
collection; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 440. 
The Amazons 
15747, 1, 112 mm., Rio Huallaga, Yurimaguas, Allen, November, 1920. 
332. CHALCINUS ROTUNDATUS (Schomburgk) 
Chalceus rotundatus Schomburgk, 1840, Fish. Brit. Guiana, I, 209. 
Chalcinus brachypomus Cuvier and Valenciennes, 1848, Hist. Nat. Poiss., X XII, 259; 
Ginther, 1864, Cat. Fish. Brit. Mus., V, 339. 
Chalcinus rotundatus Figenmann, 1912, Mem. Carnegie Mus., V, 377, pl. lv, fig. 1. 
Chalcinus rotundatus iquitensis Nakashima, 1941, Bol. Mus. Hist. Nat. Lima, V, 64 (fide G. 8. 
Myers.) 
333. CHALCINUS ELONGATUS Giinther 
Chalcinus elongatus Giinther, 1864, Cat. Fish. Brit. Mus., V, 342; 
Steindachner, 1876, Sitzb. Kh. Akad. Wiss. Wien, LX XIV, 54, Teffé and Peruvian Amazon; 
Garman, 1890, Bull. Essex Inst., XXII, 6, Tabatinga; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 440; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 377; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sci. Phila., NCI, 265, fig. 60, two, 108 and 123 mm., 
Contamana. 
Chalcinus elongatus iquitensis Nakashima, 1941, Bol. Mus. Hist. Nat. Lima, V, 63. 
Orinoco and Guianas, to Amazons 
15742, 2, about 220 mm., Iquitos, Allen, September, 1920. 
15748, 10, 210-235 mm., Lago Sanango, Allen, November, 1920. 
Genus 127: COSCINOXYRON Fowler 
Coscinoxyron Fowler, 1906 (1907), Proe. Acad. Nat. Sci. Phila., LVIII, 450; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 440. 
Chalcinus (part) Eigenmann, 1912, Mem. Carnegie Mus., V, 376. 
Type: Chalcinus culter Cope 
Range that of the species 
Gill-rakers, finer, longer, and more numerous on the first arch than in Chal- 
cinus, totaling about one hundred; dorsal fin in a posterior position, at about the 
two-thirds point in the length of the head and trunk. 
