260 The South American Characinidee 



Body rather deep, compressed, the dorsal outlines rising rapidly to the 

 dorsal fin. Head wide, its greatest width three-fifths of its length. The 

 upper lip projects somewhat beyond the lower, snout 3^ in the head. Eye 

 1^ iu the interorbital space, 2J in the head and | in the snout. Dorsal fin 

 high, marked with black spots arranged in several irregular bands. The 

 caudal fin is marked with three oblique dark bands on each lobe. The 

 anal not evidently marked, the three anterior rays spinous. 



Color silvei-y, the upper part of the body darker. The scales closely 

 imbricated, the exposed part deeper than long. The upf)er part of each 

 scale darker colored than the lower part, thus forming alternating dark 

 and light horizontal lines, more evident below the lateral line. 



Radial formula D. I. 11, A. 11-12 ; scales 11^-61-12^. Depth 2-2|, 

 head 3|-4 in the length. 



Trocera on Tocantins, one specimen 11 cm. long. The Ama- 

 zons one specimen 9.5 cm. long. These specimens may be placed 

 as brama, although the description given by Giinther is so brief 

 I can not be certain concerning them. I have not access to the 

 description of Cuv. & Yal. or that of Castelnau, 



14. Procliilodus scrofa Steindnacher. 



Flussfische Sudamerica's, II., 29, pi. VI., fig. 2, 1881. (Rio Janeiro). 

 Eigenm. & Eigenm., Proc. U. S. Xat. Mus., XIV., 48, 1891. 

 Brazil, one specimen. 



15. Cliiloclus labyriiitliicus (Kuer), 



Microdus labyrinthicus Kner. Denkschr. Acad. Wiss. Wien., XVII., 

 1859, 149, taf. 3, fig. 5 (Rio Branco ; Rio Negro). 



Ccvnotropus lahyrinthieiis Giinther, Cat. Fish. Brit. Mus., V., 297, 1864 

 (Capin River); Steiud., Flussf. Siidamerika's, I, 5, 1879 (Orinoco near 

 Ciudad, Bolivar). 



Chilodus labyrinthicus Eigenm. & Eigenm., Proc. U. S. Nat. Mus. 

 XIV., 49, 1891. 



Three specimens from the Fall of Rio Tapajos ; one specimen marked 

 Brazil, 



16. IIeniiodU!muicrocep]ia]u§ Giinther. 



Cat. Fish. Brit. Mus., V.,298, 1864 (River Capin); Eigenm. & Eigenm. 

 Proc. U. S. Nat. Mus., XIV., 49, 1891. 

 One specimen from Brazil. 



17. HeiiiiodiDii iiiicrolepis Kner. 



Denkschr. Wien. Acad., XVII., 155, taf. 4, fig 8 (Rio Guapore ; Rio 

 Negro); Giinther, Cat. Fish. Brit. Mus., V., 300, 1864, Eigenm. & 

 Eigenm. Proc. U. S. Nat. Muse. XIV., 49, 1891. 



Emiodus microlepis Cope, Proc. Amer. Philos. Soc, 86, 1878 (Peruvian 

 Amazon). 



Brazil, three specimens. D. 11, A, 13, Head 4^ ; depth 3^-3g ; Braret, 

 three specimens 11 cm. long. The proportions are, head 4^; depth 4, 



