Eigenmann: Collection of Fishes from Paraguay. 141 



This species is the image of Astyatiax fasciaius Cuvier, but differs 

 generically from the species in the character of the teeth. 



Head 3.75; depth 2.6 ; D. n; A. 2,22; scales 6-34-5. 



Dorsal and ventral profiles nearly equally curved in front of the 

 dorsal and ventrals ; head somewhat pointed, the snout rather long \ 

 mouth nearly horizontal, the maxillary oblique, reaching at least to 

 front of pupil ; eye large, equal to snout in length, 3^3 in head, less 

 than interorbital width. 



Origin of dorsal slightly behind origin of ventrals, a little nearer 

 tip of snout than base of middle caudal rays, its height less than 

 length of head ; anal moderate, its margin slightly concave ; ventrals 

 not reaching anal ; pectorals not to ventrals. 



Free margins of the scales with a series of non-converging sub-par- 

 allel lines. 



In alcohol, straw color ; a silvery lateral band overlying a dark 

 band ; a well-marked round humeral spot smaller than eye ; a well- 

 defined caudal spot continued to the end of the middle rays ; no 

 other marks on the fins. 

 72. Chakinus angulatus Agassiz. 



Chalcinus angulatus curtus E. & K., 1. c, 24. 



Bahia Negra (384), Corumba (360). 

 7 3 . Thoracocharax stellatus ( K ner ) . 



Bahia Negra (385) and Corumba (357). 



74. Pygocentrus natter eri (Kner) Piranha. 



Rio Paraguay at Porto Murtinho, and Corumba (285 and 342). 



75. Serrasalmo spilopleura Kner. Piray, Pirambe. 



Rio Otuquis ; Rio Paraguay at Ascuncion, and Porto Murtinho 

 (278, 284, 377, 378, 395). 



76. Serrasalmo humeralis Cuvier and Valenciennes, Pirambeva. 

 (Plate XXXIII, Fig. 2). 



Porto Murtinho (384), Bahia Negra (410). 



77. Metynnis niola (Eigenmann & Kennedy) (Plate XLII, Fig. 1). 

 A specimen somewhat larger (No. 376) than any of those recorded 



before, may be different. It is from the Rio Otuquis. A. 37 ; D. 

 18; ventral serrae 29-2, none of them two-pointed; back under 

 dorsal without cross-bands, cross shades behind the dorsal. Sides be- 

 low the lateral line and along the lateral line spotted. 



In two small specimens (No. 361) from Puerto Murtinho, Matto 

 Grosso, there are no cross-bands on back. 



