NO. 15.'S6. LIST OF CHARACIN FISHES— EWENMANN AND OGLE. 15 



HemigTammus nanus Lutken. 



No. 44958. Four specimens from Lagoa Santa, Brazil, presented by 

 Dr. Chr. Liitken. These are probably some of the types. No maxil- 

 lary teeth. 



Hemigrammus gracilis Liitken. 



No. 44959. Four specimens, probably from Lagoa Santa, Brazil, 

 presented b}^ Lutken. A microscopic preparation shows the maxillary 

 to have two conical teeth, scarcely projecting beyond the margin of 

 the jaw. 

 Hemigrammus micropterus Meek, ne-w species. 



Type. — No. 1OS02. Museum of Indiana University. Specimen 

 thirteen-sixteenths inch long; Los Castillos, Venezuela; Oscar Riddle, 

 collector. 



Head 4; depth 3.2; A. 24; scales 4-32-4; maxillary reaching to 

 front of pupil; eye 2f in head; interorbital about equal to eye; max- 

 illary^ with a single, 4-pointed tooth. Pectorals reaching within one 

 scale of the ventrals, ventrals not quite to anal; origin of dorsal over 

 origin of ventrals. Scales of the back with rather broad dark mar- 

 gins, a black lateral line, most intense above anal, not quite reaching 

 the caudal spot, which extends to the end of the middle ra3^s. 

 Hemigrammus tridens Eigenmann, new species. 



Type. — No. 11262, Museum of Indiana University. Specimen 20 

 nmi. to base of caudal. Arroyo P^^pucu, Paraguay Basin, collected 

 by J. D. Anisits. 



Cotype. — No. 11262a, Museum of Indiana University, specimen 18 

 mm. to base of caudal. Arroyo Pypucu, Paraguay Basin, collected 

 by J. D. Anisits. Head 3.4; depth 3; A. 16-19; lateral line probably 

 between 30 and 35; eye 2.4 in head, considerably longer than the 

 width of the interorbital. Maxillary extending to below eye, nearl}^ 

 to the pupil, with two 5-pointed teeth, the points nearly equal in 

 length; premaxillary teeth with five long points, the middle one much 

 the largest. Origin of dorsal behind the ventrals, about equidistant 

 between base of middle caudal raj'S and middle of eye. Anal short, 

 its origin about equidistant from base of middle caudal rays and origin 

 of pectorals. Ventrals reaching anal, pectorals not to ventrals. A 

 rather broad, blackish band overlying a deeper black line; a jet-black 

 band across end of tail, continued forward to a blunt median point 

 and backward along the edge of each caudal lobe and along the middle 

 caudal rays, but not to their tips. 

 Hemigrammus boulengeri Eigenmann, new species. 

 Tetragonopierus fasciutus interruptus Eigenmann, part, Ann. N. Y., VII, 1894, p. 634 



(Rio Grande do Sul) . Not of Lutken. 



Tyj)e. — No. 11073, Museum of Indiana Universit3\ Specimen 36 mm. 

 to base of caudal, 45 over all. Rio Grande do Sul, Brazil, von Ihering. 



Head 3.33; depth 2.66; A. about 22; lateral line about 30; eye 



