DEC. 28, 1916. FISHES OF PANAMA MEEK AND HILDEBRAND. 293 



It is eaten by the natives who fry it crisp in oil. Prepared in this way 

 the bones and flesh are eaten together, making a very palatable dish. 

 Habitat: Atlantic slope of Panama northward to Guatemala. 



39. Roeboides occidentalis sp. nov. 



Type No. 8948, F. M. N. H.; length 115 mm.; Rio Cardenas, 

 Corozal, Panama. 



Head 3. 35 to 4.1; depth 2.35 to 2.9; D. n; A. 44 to 50; scales 72 to 80. 



Body deep, strongly compressed; the dorsal region elevated; profile 

 deeply concave over eyes in adult, less so in young; head small; snout 

 blunt, 3.5 to 4 in head; eye 3 to 3.9; interorbital 3.45 to 3.9; mouth large; 

 upper jaw projecting; maxillary reaching posterior margin of pupil, 

 1.7 to 2.2 in head; teeth as in preceding species; gill-rakers moderate, 

 10 or ii on lower limb of first arch; shoulder girdle with a long, sharp 

 spine reaching base of pectoral; lateral line straight, complete; scales 

 small and thin; dorsal fin elevated anteriorly, its origin about midway 

 between tip of snout and base of caudal or slightly nearer the former; 

 adipose fin well developed, over about the seventh ray of anal counting 

 from the last ray forward; caudal fin naked, the lower lobe the larger; 

 anal fin very long, its origin about midway between tip of snout and 

 base of its last ray; ventral fins reaching past origin of anal; pectoral 

 fins overlapping the ventrals, a little longer than the latter. 



Color greenish above, silvery below; with bright silvery lateral 

 band; an obscure shoulder spot at upper angle of opercle; a larger and 

 more distinct black spot about an eye's diameter behind the first; a 

 black caudal spot present. Pectorals greenish; other fins greenish at 

 base, reddish at tips. 



We have numerous specimens, ranging in length from 30 to 170 mm. 

 It is common in all the Pacific slope streams of Panama, from the head 

 of tide water up to the mountain streams. 



This species like the preceding is used as food. 



Habitat : Pacific slope of Panama and probably southward to Colombia 

 and Ecuador. 



29. Genus Brycon M tiller & Troschel. 

 PIPON; SARDINA. 



Brycon Muller & Troschel, Horae Ichthyologies, I, 1845, 15 (type Brycon 



falcatus Miilter & Troschel). 

 Chalcinopsis Kner, Sitzungsbr. K. Bayer. Ak. Wiss. Munchen., 1863, 



226 (type Chalcinopsis striatuus Kner). 



Body elongate, robust anteriorly, compressed posteriorly, covered 

 with cycloid scales; dorsal fin over or slightly behind ventrals; mouth 



