1913.1 



NATURAL SCIENCES OF- PHILADELPHIA. 



525 



Poecilobrycon digrammus sp. nov. Fig. 5. 



Head 3f ; depth 4|; D. ii, 9; A. ii, 9; P. i, 9; V. i, 6; scales 25 

 in median lateral series from gill-opening to caudal base; 6 scales 

 transversely between dorsal and ventral origins; 10 predorsal scales; 

 head width If in its length; head depth at occiput If; snout 3f ; 

 eye 3; mouth .width 4j; interorbital 3; first branched dorsal ray 

 1|; first branched anal ray 2|; least depth of caudal peduncle 3: 

 upper caudal lobe 1|; pectoral 1|; ventral If. 



Body elongate, slender, fusiform, moderately compressed, deepest 

 at ventral origin, edges all convex, and profiles similar. Caudal 

 peduncle well compressed, rather long, and least depth 2x in its 

 length measured from last branched anal ray base. 



Fig. 5. — PoEcilohnjcon digrammus Fowler. (T\-pe.) 



Head conic, elongate, profiles similar, broadly depressed above, 

 convex sides slightly constricted below. Snout conic, depressed, 

 tip obtuse as seen from above, and length about f its basal width. 

 Eye large, rounded, or slightly ellipsoid, placed slightly anterior, 

 with free edge and no adipose eyelid. Pupil rounded, moderateh- 

 large. Mouth small, terminal, transverse, with very short com- 

 missure. Lips thin. Maxillary small, inclined, not reaching back 

 to anterior nostril. Teeth uniserial in jaws, compressed, broad, 

 with five serrae or points equally along edge. Mandible shallow, 

 even with snout tip when closed, broad. Nostrils well separated, 

 anterior simple small pore near first f in snout length, and posterior 

 larger simple pore close before upper eye edge. Interorbital broad 

 and slightly convex. Preorbital large. Infraorbitals and post- 

 orbital well developed, cover cheek entirely, though first-named 



