138 THE AMERICAN CHARACIDAE. 
spot small and indistinct. Maxillary with two or three small conical 
or tricuspid teeth. Depth 3; D. 11; A. 20-23; scales 5-30 to 34-3 to 
BO cc xeusatere tee sea nete.c ee eben 19. schmardae (Steindachner). 
dddd. Wumeral spot present; no caudal spot, (humeral spot sometimes faint or lacking). 
n. Anal rays 19-26. 
o. Compressed, humeral spot often very faint. 
p. Middle teeth of the inner row of the premaxillary 5- to 7-pointed; 
outer caudal rays unmarked. Frontal fontanel almost equal 
to the parietal. 
q. Depth 2.75. Humeral spot very faint, horizontally elongate. 
Second suborbital sometimes in contact with the pre- 
opercle below. Maxillary three fourths of the eye, with 
two or three small conical or tricuspid teeth. D. 11; 
A. 23 to 26; scales 5-33 to 34-3.5...20. lunatus Durbin. 
qq. Depth 2.8-3.5. Humeral spot faint sometimes vertically 
elongate. Second suborbital leaving narrow naked mar- 
gins behind and below. Mouth very small. Maxillary 
little more than one half the eye, with two or three 4- to 
7-pointed teeth. D.11; A. 19 to 22; scales 5-31 to 34-3. 
21. microstomus Durbin. 
qqq. Depth 3.75. Humeral spot faint or diffuse, roundish. 
Second suborbital leaving narrow naked margins behind 
and below. Mouth moderately large. Maxillary equal 
to eye. First seven anal rays dusky. D. 11; A. 19-22; 
scales 5-30 to 33-3. Caudal not deeply sealed, 3 to 5 
scales on each lobe.-......:......- 22. orthus Durbin. 
pp. The inner row of the premaxillary with five to seven narrow 3- 
pointed teeth. Sides of caudal lobes often edged with a 
narrow dusky line. Humeral spot faint, vertically elongate, 
behind the upper margin of the eye. Eye 2.9 in the head. 
Frontal fontanel small, one half the length of the parietal. 
Second suborbital leaving narrow naked margins behind and 
below. Maxillary with three to five conical or tricuspid teeth. 
D. 11; A. 20-22; scales 5 to 7-30 to 33-3 or 3.25. 
23. cupreus Durbin. 
oo. Subcylindrical, eye a little longer than broad, 2.25 in the head, 
snout comparatively long, 3.25 in the head. Maxillary nearly 
straight, with three to six tricuspid or conical teeth. Humeral 
spot small and intense. D.11; A. 17—20; scales 5-30 to 34-3. 
24. cylindricus Durbin. 
nn. Anal rays 12 to 14. Depth 3.2 to 3.5. Humeral spot diffuse. A 
wide silvery lateral stripe. Each dorsal scale marked with an 
intense dark spot. Second suborbital leaving considerable naked 
margins behind and below. Maxillary with two or three 6- to 7- 
pointed teeth. D. 11; A. 12-14; scales 5-30 to 32-3. 
25. analis Durbin. 
1. HeMIGRAMMUS ULREYI (Boulenger). 
Plate 17, fig. 1; Plate 78, fig. 9, 10. 
Tetragonopterus ulreyi BOULENGER, Proc. Zool. soc. Lond., 1895, p. 529; Trans. Zool. soc. Lond., 1896, 
14, p. 35, pl. 8, fig. 3 (Descalvados); Boll. Mus. univ. Torino, 1900, 16, no. 370, p. 3 (Urucum); 
EIGENMANN, Ann. Carnegie mus., 1907, 4, p. 126 (Corumba). 
Hemigrammus ulyreyi EIGENMANN & OGLE, Proc. U. S. N. M., 1907, 33, p. 13; EraenmMann, Rept. 
Princeton univ. exped. Patagonia, 1910, 3, p. 435; Exuis, Ann. Carnegie mus., 1911, 8, p. 162 
(Petas, Bolivia; Caceres; Jauru; Rio Santa Rita). 
Hasirat.— Paraguay Basin. 
