Ellis: Hasemania, Hyphessobrycon, and Hemigrammus. l">-'! 



5. Hyphessobrycon parvellus >|>. nov. 

 Plate 11. fig. i. 

 Type, 30 111111. ( . M. \.>. 3011. Alagoinhas, Rio Catu. 



Cotypes, three specimens, 20 to -'_' nun. C. M. No. .<oi2. Alagoinhas Rio 

 Catu. 



1 >./'<■, one specimen, -'-' mm. ('. M. No. 3013. No label. 

 Cotypes, seven specimens, 13 to 19 nun. C. M No 1932 Queimadas, Rio 

 Itapicuru. 



<e, 1 specimen, 17 mm. C. M. No. 30] 1. Aqua Quente. 

 Cotype, one specimen, :8 nun. C. M. No. 20^0. Riberiio, Azula Lagda 

 Coiype, one specimen, 12 mm. C. NT. No. 2931. Ri<> Tiete. 



Head 3.5; depth 2.75; 1). 11; A. 2001-21; scales 5-32 to 34-3 to 4. 

 Eye 2.3 in the head; interorbital less than the eye, about 2.7 in the 

 head. Compressed, depth of head at the base of the occipital process 

 1.25 in the greatest depth. Occipital process bordered by two and a 

 half scales. Interorbital convex. Frontal fontanel triangular, ver\ 

 small. Second suborbital leaving a narrow naked margin behind and 

 below. Mouth rather small; snout very short, about 1.66 in the eye. 

 Maxillary less than the eye, 2.6 in the head. Mandible equal to the 

 eye. Premaxillary with three or four narrow, conical teeth in the 

 outer row. and five or six tricuspid teeth in the inner row. Maxillary 

 with, or without, one small, conical tooth. Dentary with a graduated 

 series of four tricuspid teeth followed by three conical teeth on the side. 

 Gill-rakers 11 +9, short and strong. Anal sheath composed of six 

 - covering the base of the first ten rays. Lateral line with pores 

 developed on the first six to eight scales. Origin of the dorsal equi- 

 distant from the snout and the caudal. Longest dorsal ray 3.5 in the 

 length. Caudal a little longer than the head. Origin of the anal on 

 the vertical from the last dorsal ray. Anal usually emarginate. 

 Ventrals on the vertical from the first scale in front of the dorsal; 

 ventrals just reaching the anal. Pectorals just reaching the ventrals. 

 No humeral spot. Caudal spot either diffused or condensed. Lateral 

 narrow, faint, overlaid with silvery. Anal often with a dark 

 margin. Longest anal and dorsal rays tipped with white. Sides, exclu- 

 sive of the region over body cavity, with numerous chromatophores. 



6. Hyphessobrycon reticulatus sp. nov. 

 Plate II, fig. 2. 

 Type, 48 mm. C. M. No. 3018. Campos. 

 Cotype, one specimen, 40 nun. C. M. No. 3010. Morretes. 

 Cotypes, seven specimens, 40 to 43 mm. C. M. No. 3020. Muniz Freire. 



