56 



THE AMERICAN CHARACIDAE. 



Tetragonopterus sawa Castelnau, Exped. Amer. Sud. Poissons, 1855, p. 65, pi. 33, fig. 1 (Rio Coxas). 

 Telragonopterus chalceus Eigenmann & Kennedy (non Agassiz), Proc. Acad. nat. sci. Phil., 1903, p. 523 

 (Rio Paraguay; Arroyo Trementina). 



Habitat. — From the Orinoco and Guiana to the Paranahyba basin, Ama- 

 zons and Paraguay, Parana to Buenos Aires. Not in the coastwise streams 

 between Buenos Aires and the Paranahyba. It is rare in Guiana and the 

 only species in the La Plata basin. 



Specimens examined. 



21052 1 



21053 J 



64-108 



Rio Puty, into Rio Paranahyba St. John. 



1 1 have also examined the types of T. argenteus and T. rufipes. 



8 Numbers without designation indicate the Museum of Comparative Zoology; C. = Carnegie 

 Museum, Pittsburgh; I. = Indiana University; U. = U. S. National Museum. 



