180 FISHES OF WESTERN SOUTH AMERICA 
Type: Brochis coeruleus Cope 
Peruvian Amazon 
The ten to twelve dorsal rays separate the genus from the next, compared with 
its 6-8; they are allied in having the narrow occipital process reaching the dorsal 
plate. 
160. BRocHIS COBRULEUS Cope 
Brochis coeruleus Cope, 1871, Proc. Acad. Nat. Sei. Phila., XXIII, 277, pl. vii, figs. 2a and 2b; 
pl. ix, fig. 3, R. Ambyiacu; 
Jigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 464; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 402; 
Gosline, 1940, Stanford. Iehth. Bull., I], 1, 24. 
Brochis dipterus Cope, 1871, Proce. Acad. Nat. Sci. Phila., XXIII, 278, Rio Ambyiacu; 
Ellis, 1913, Ann. Carnegie Mus., VIII, 394. 
Rio Ambyiacu, Peru 
Genus 71: CHAENOTHORAX Cope 
Chaenothorax Cope, 1878, Proc. Amer. Phil. Soc., X VII, 679, Peruvian Amazon; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 402; 
Ellis, 1913, Ann. Carnegie Mus., VIII, 392. 
Brochis Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 463, (in part) ; 
Gosline, 1940, Stanford Ichth. Bull., II, 1, 24. 
Type: Chaenothorax bicarinatus Cope 
Peruvian Amazonia 
Similar to Brochis in the character of the occipital process; differing in the 
short dorsal fin, having only 6-8 rays; exposed coracoid processes variable, but not 
enclosing the breast and belly entirely. 
161. CHAENOTHORAX BICARINATUS Cope 
Chaenothorax bicarinatus Cope, 1878, Proc. Amer. Phil. Soc., X VII, 679, Peruvian Amazon; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 402; 
Ellis, 1918, Ann. Carnegie Mus., VIII, 392. 
Brochis (Chaenothorax) bicarinatus Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sei., 
I, 464. 
Brochis coeruleus Gosline, 1940, Stanford Ichth. Bull., II, 1, 24. 
Peruvian Amazon 
162. CHAENOTHORAX SEMISCUTATUS (Cope) 
Corydoras semiscutatus Cope, 1871, Proc. Acad. Nat. Sci. Phila., X XIII, 280, pl. vi, figs. la and 1b, 
Rio Ambyiacu. 
Brochis semiscutatus Eigenmann and Eigenmann, 1888, Proc. Cal. Acad. Scei., (2), I, 165. 
Brochis (Chaenothorax) semiscutatus Eigenmann and Kigenmann, 1890, Occ. Papers Cal. Acad. Sci., 
I, 464. 
