Haseman : Expedition to Central South America. 371 



No. 2830, 8.5 cm., San Joafiuin, Boli\ia, in a nni(l(l\- lake near Rio 



Marmore, Sept. 4, 1909. 



D. XI\', 10; A. Ill, 7; depth 2.33; head 2.75; eye 3.75; snout 2; 

 scales 4-29-10 (counted in a median row); sixteen gill-rakers; five 

 or six faint broken cross-bands; small spot on upper part of base of 

 caudal; a few spots in base of soft dorsal; pectoral fins extend to anal 

 spines; last dorsal spine a little more than half of length of head. 

 No. 2831, 15.5 cm., Manaos, Nov. 29, 1909. 



D. XV'I, 9; sixteen gill-rakers; twenty-nine scales in a median lateral 

 series; pectorals reaching past the first anal spine; head with blue spots; 

 very faint broken lateral band and a small caudal spot; edge of dorsal 

 black; caudal peduncle as long as deep; vertical fins with a few white 

 spots. This specimen had a small one in its mouth. 

 No. 2832, 14 cm., Manaos, Nov. 27, 1909. 



D. X\', 10; A. Ill, 6; sixteen gill-rakers; several of the scales on 

 the sides have silvery white spots, otherwise like the above specimen. 

 No. 2833, 8.3 cm., Santarem, Rio Tapajos, Dec. 6, 1909. 



Fifteen gill-rakers; caudal peduncle not quite as long as deep; 

 a stripe between the eyes and another across the head just back of 

 the eyes; six or seven cross-bands; dorsal and anal fins spotted; 

 a small caudal spot; pectorals not quite reaching the anal. 

 No. 2834, 4.3 cm., Sao Luiz de Caceres, Rio Paraguay, May 24, 1909. 



A. Ill, 8; scales 30; caudal peduncle as long as deep; pectorals 

 extending to origin of anal; three stripes between the eyes and one 

 back of them; the faint lateral band crossed by about seven broken 

 bands; vertical fins spotted; two light brown bands from the eye to 

 the mouth; sixteen gill-rakers. 

 No. 2835a-<;, 4.1-6.5 cm., Bastos, Rio Alegre, June 27, 1909. 



D. XIV, II; caudal peduncle longer than deep; sixteen gill-rakers; 

 scales thirty; lateral band crossed by six faint bands; two or three 

 stripes between and back of eyes; two stripes from the eyes to mouth. 

 No. 2836, 4 cm., Bastos, Rio Alegre, June 26, 1909. 

 No. 2837, 3.5 cm., Campos Alegre, Rio Jauru, June 3, 1909. 

 No. 2839, 3.5 cm., Posada, Campos de Matto Grosso (swampy plains 



in headwaters of Rio Guapore), June 21, 1909. 



Depth of body equals length of head, 2.67 in length of body ; D. XIV, 

 10; A. Ill, 6; scales 29; caudal peduncle not quite as long as deep; 

 six very distinct cross-bars and a median lateral band; dorsal fin 

 barred and spotted, other fins plain; stripes between the eyes; two 



