338 Bulletin 47, United States National Museum. 



membranes free from isthmus ; gill-rakers slender, lanceolate. Dorsal fin 

 inserted behind middle of body, above anal ; anal long ; pectorals long ; 

 ventrals small or rudimentary. Species few, chiefly Brazilian, (yaarrjp, 

 belly; Tre^e/cvf, axe.) 



566. UASTEROPELECUS MACULATES, Steindaclmer. 



Head 3f ; depth If. D. 11 ; A. Ill, 33; P. 10; scales 31 or 32. Premax- 

 illary teeth in two rows; upper jaw with three simple canines on each 

 side; pectoral falcate, nearly half length of body; ventrals minute; dor- 

 sal small ; caudal moderate ; anal very long ; lateral line not reaching 

 anal. Length 3 inches. Silvery, many of the scales above with dark 

 spots ; a silver gray stripe from shoulder to caudal. Rio Mamoni, near 

 Panama. (Steiudachner.) (maculatus, spotted.) 



Gasteropelecus maculatus, STEINDACHNEB, FluBS-fische Sudamerikas, 168, 1879, Rio Mamoni, at 

 Chepo, Panama. 



143. RCEBOIDES, Giinther. 



Roeboides, GUNTHEB, Cat., v, 347, 1864, (microlepis). 



Body oblong or rather elevated, covered with very small scales; lat- 

 eral line complete. Belly rounded in front of ventrals, which are close 

 to pectorals; humerus dilated or produced in a process before pectorals. 

 Mouth wide, with conical teeth in premaxillary, maxillary and mandible; 

 those on mandible uniserial ; those in upper jaw uniserial or irregularly 

 biserial; front of jaws with short, conical, tooth-like processes directed 

 forwards; palate toothless. Nostrils close together, separated by mem- 

 brane only. Gill-openings wide, the membranes separate, not attached 

 to the isthmus ; gill-rakers slender, lanceolate. Dorsal fin short, nearly 

 median, behind ventrals ; anal long, beginning below or before dorsal, 

 Adipose fin present. Species few. (p/3(f%, crooked-looking.) 



567. R(EBOIDES GUATEMALENSIS (Giinther). 



Head 4 ; depth 2f ; eye 3i in head. D. 11 ; A. 51 ; scales 19-80-22. Ver- 

 tebra} 12 -f 22. Each jaw anteriorly with a short, conical, tooth-like 

 process directed forward on each side; no canine teeth above, those below 

 small and short; lower jaw shortest ; maxillary reaching nearly to middle 

 of eye. Back elevated, the upper profile forming an S-shaped curve. 

 Humeral process ending in a point. Dorsal inserted above fifth or sixth 

 anal ray; caudal deeply forked ; ventral below middle of pectoral, which 

 nearly reaches anal. Olivaceous, with a silvery lateral band. Rio Chagres, 

 and streams of Guatemala. (Giinther.) 



Anacyrtus guatemalensis, GUNTHER, Cat., v, 347, 1864, Rio Chagres; Huamuchal. (Coll. Salviii 

 & Dow.) 



144. BRAMOCHARAX, Gill. 



Bramocharax, GILL, Proc. Ac. Nat. Sci. Phila., 1877, 189, (bransfordi). 



Body elongate, fusiform, compressed, covered with moderate-sized 

 scales; belly before ventrals rounded; lateral line decurved, complete. 



