THE AMERICAN TETRAGONOPTERINAE. 193 
Specimens examined. 
Number of 
Catalogue number specimens Size in mm. Locality Collector 
3011 C. Type 1 30 Alagoinhas, Rio Catu Haseman 
3012 C. Paratypes 3 20-30 Alagoinhas, Rio Catu Haseman 
3013 C. Paratype 1 22 ? Haseman 
2932 C. Paratypes 7 13-29 Rio Itapicurti, Queimadas Haseman 
3014 C. Paratype 1 17 Agua Quente Haseman 
2930 C. Paratype 1 18 Riberao, Azul Lagoa Haseman 
2931 C. Paratype 1 12 Rio Tieté Haseman 
Head 3.5; depth 2.75; D. 11; A. 20 or 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 2.5 scales. Interorbital 
convex. Frontal fontanel triangular, very 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. Maxil- 
lary with, or without, one small, conical tooth. Dentary with a graduated series 
of four tricuspid teeth followed by three conical ones on the side. 
Gill-rakers 11 + 9, short and strong. 
Anal sheath composed of 6 scales covering the base of the first 10 rays. 
Lateral line with pores developed on the first 6 to 8 scales. 
Origin of the dorsal equidistant 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 diffuse or condensed. Lateral 
stripe narrow, faint, overlaid with silvery. Anal often with a dark margin. 
Longest anal and dorsal rays tipped with white. Sides, exclusive of region 
over body-cavity with numerous chromatophores. 
