1914. 



NATURAL SCIENCES OF PHILADELPHIA. 



245 



tion injured) ; 8 scales above 1.1.; 7 scales below 1. 1. to ventral origin ; 

 8 scales below 1. 1. to anal origin; 9 scales before dorsal to posterior 

 end of occipital process; head width 2 in its length; head depth at 

 occiput 1; snout 3f; eye 3; maxillary 2|; interorbital 2f; first 

 branched anal ray If; least depth of caudal peduncle 2|; pectoral 

 1^; ventral 1^. 



Body deep, well compressed, rather ovoid, predorsal and post- 

 dorsal with slight median ridge, and other edges convex, except 

 slight ridge each side along abdomen before ventral, most distinct 



Fig. 7. — Moenkhausia chrysargyrea leucopomis Fowler. (Type.) 



just before latter. Greatest depth at dorsal origin. Caudal peduncle 

 well compressed, and its length about f its least depth. 



Head deep, well compressed, lower profile more inclined than 

 upper, which latter nearly straight from snout front to occiput. 

 Flattened head sides very slightly converging below. Snout convex 

 over surface and in profile, broadly convex as seen from above and 

 length about half its width. Eye rounded, placed about first | in 

 head. Adipose-eyelids slightly developed in front and behind. 

 Mouth broad, terminal, about level with upper rim of pupil. Lips 

 thick, fleshy, firm. Jaws about even when closed, mandible scarcely 



