THE AMERICAN TETRAGONOPTERINAE. 221 



scarcely reaching the first long anal rays. Pectorals large, reaching beyond 

 the middle of the ventrals. 



Ground color light; a broad blackish stripe from the eye to the end of the 

 middle caudal rays, becoming fainter behind the adipose; a very faint lateral 

 elongation of the lateral stripe in the region of the humeral spot. A faint, dusky, 

 oblique stripe across the dorsal from the base of the first to the tips of the seventh 

 and eighth rays. All of the fins a little dusky. Scales of the back heavily 

 outlined with dusky, top of the head and lips quite dark. Sides and head 

 silvery between the lateral stripes. 



11. HaseMania Ellis. 

 For John Haseman. 



Hasemania Ellis, Ann. Carnegie mus., 1911, 8, p. 148. 



Type. — Hasemania melanura Ellis. 



A Tetragonopterid, with two rows of premaxillary teeth, the maxillary 

 without teeth or with a few teeth in its upper angle, the lateral line incomplete, 

 the caudal naked. No adipose fin. Like Hyphessobrycon but without an 

 adipose. Pectoral frequently archaic in small specimens. 



Habitat. — Southeastern Brazil. 



« 



Key to the Species. 



a. Maxillary equal to the eye, with two small tricuspid teeth. Premaxillary teeth narrow, tricuspid 

 or conical. Snout sharp; interorbital narrow, less than the eye, 4 in the head. D.ll; A. 19; 



scales 7-32-5 or 6 1. inaxUlaris Ellis. 



aa. Maxillary less than the eye, elliptical, without teeth. Teeth in the inner row of the premaxillary 

 with more than 3 points. Interorbital 3 or less, in the head. 

 6. Snout short and blunt. Dentary with four or five 5- or 6-pointed teeth. A distinct blackish 

 caudal spot extending to the tips of the middle caudal rays. D.ll; A. 16 to 18; scales 6-33 



to 36-5 2. melanura Ellis. 



66. Dentary with three broad chisel-shaped, 8- or 9-pointed teeth. No distinct caudal spot; a 

 heavy black lateral stripe, another black stripe along the underside of the caudal peduncle 

 extending to the base of the last anal ray and continued in a straight line to just above the 

 first anal ray. D.ll; A. 14 to 17; scales 5-33 or 34--1 3. bilineala Ellis. 



1. Hasemania maxillaris Ellis. 

 Plate 31, fig. 1. 



Hasemania maxillaris Ellis, Ann. Carnegie mus., 1911, 8, p. 148, pi. 1, fig. I. 



One specimen 2937 C. Type. 29 mm. Porto Uniao, Rio Iguassii. Haseman. 

 Head 3; depth 3; D. 11; A. 19; scales 7-32-5 or 6; eye 3 in the head; 

 interorbital less than the eye, about 4 in the head. 



