PLATE 6. 



Fig. 1. Moenkhausia melogramma Eigenmann. 



20825 M. C. Z. About 47 mm. (caudal broken). Type. Tabatinga, Brazil. 



Fig. 2. Moenkhausia comma Eigenmann. 



20972 part, M. C. Z. About 85 mm. (caudal broken). Type. Cudajas, Brazil. 



Fig. 3. Moenkhausia chrysargyrea (Gunther). 



11842 I. U. M. 78.5 m. Crab Falls, British Guiana. 



