THE AMERICAN TETRAGONOPTERINAE. 155 
of anal and the base of dorsal tinged with red. Females with yellow on caudal, 
anal, and dorsal in place of the red described in the case of males. The white 
bar on anal lacking in females. 
13. H®rMIGRAMMUS BREVIS Ellis. 
Hemigrammus brevis Euuis, Ann. Carnegie mus., 1911, 8, p. 161, pl. 3, fig. 4 (Barreiras). 
Hasitat.— San Francisco Basin. 
Specimens examined. 
Number of Size 
Catalogue number specimens in mm. Locality Collector 
3068 C. Type 1 35 Barreiras, Lagoas of Rio Grande Haseman 
of San Francisco Basin 
3069 C. Paratypes 2 31, 33 Penedo, Rio San Francisco Haseman 
3070 C. Paratypes 3 34-36 Barreiras, Lagoas of Rio Grande Haseman 
3071 C. Paratypes 33 20-27 Boqueirao, Rio Preto Haseman 
Head 3.5; depth 2.6; D.11; A. 20 to 22; scales 5-29 to 33-3 to 4. Eye 
2 to 2.3 in the head; interorbital less than the eye, 2.7 in the head. 
Compressed; depth of head at the base of the occipital process about 
1.6 in the greatest depth. Preventral and predorsal regions rounded. 
Occipital process about 5 in the distance from its base to the dorsal, bor- 
dered by 2 scales. Interorbital slightly convex. Frontal fontanel triangular, 
as wide as the parietal, and almost equal to the parietal without the occipital 
groove. Second suborbital in contact with the preopercle. Mouth large, 
snout short, little more than one half the eye. Maxillary and mandible approxi- 
mately equal to each other and to the eye. Premaxillary with three to five 
tricuspid teeth in the outer row, and five, rarely four, 3- to 5-pointed teeth 
in the inner row. Maxillary with one to three, 3- to 5-pointed teeth. Dentary 
with a graduated series of five 5-pointed teeth followed by a series of seven to 
eleven minute tricuspid and conical ones on the sides. 
Gill-rakers 10 + 9 with 5 minute spines behind the last two on the shorter 
limb. 
Caudal sealed over the basal one half. Anal sheath short, composed of 
5 scales covering the bases of the first 9 anal rays. Lateral line with pores 
developed on the first 5 to 9 scales. 
Origin of the dorsal equidistant from the snout and the caudal; penulti- 
mate ray about one fifth of the highest, which is 3.67 in the length. Caudal 
