258 The South American Characinidae 



however, that they will make less formidable the task of unravel- 

 ing the numerous tangled places in the Tetragonopterinai when a 

 collection of sufficient material is at hand to attempt this. 



I am indebted to Dr. and Mrs. Eigenmann for much of the 

 synonymy which they had collected for a revision of the Chara- 

 cinidte and which tlie}'^ placed at my disposal, and also for the 

 free use of their extensive library on South American Fishes. 



The specimens examined belong to the Museum of Cornell 

 University. Series of the duplicates have been deposited through 

 Dr. B. G. Wilder in the museums of Indiana University and of 

 Leland Stanford Universit}^ 



ErythrinintE. 



1. IVIacrodoii inalalbarieiis (Blocb). 



Eigenmann and Eigenmann. Proc Cal. Acad. Sci., 2d Ser., II., 102, 

 1889; Eigenmann, Ann. N. Y. Acad. Sci., 1894 (Rio Grande do Snl). 



Rio das Velhas, four specimens; Brazil, fovir ; Marajo, two; Braret,* 

 two ; Bahia, one. 



These specimens show the usual variations of this species in 

 degree of light or darkness due to the different localities, the 

 color markings, canine and palatine teeth, lingual patches and 

 scales in the lateral line. 



2. Erytlii'iims iiiiitaeiiiatu!^ Spix. 



Eigenmann and Eigenmann. Proc. Cal. Acad. Sci , 2d Ser., II., 105, 

 1889. 



Brazil, two specimens. 



3. Erytlirinus erytliriiiiis (Bloch & Schneider). 

 Eigenmann and Eigenmann, Proc. Cal. Acad. Sci., 2d Ser., II., 107, 



1889. 



Fall of Rio Tapajos, ten specimens ; Lower Amazon, four specimens. 



The humeral spot is band-like; the caudal spot ocellate, a whit- 

 ish oblique bar on the hinder part of the dark brown opercle. 



4. Pyri'liiiliiia seiiiifa^ciata Steindachner. 



Eigenmann and Eigenmann, Proc. Cal. Acad. Sci., 2d Ser., II., 110,^ 



1889. 



Para, Brazil, fifty specimens ; Brazil, one sijecimen. 



The intermaxillary has three series of teeth ; the middle row 

 strongest at the middle of the mouth, the inner row of 6 or 7 

 small teeth some distance from the second, pointing inward. 



*The name Braret occurs on many labels: so far I liave not I>een able to determine 

 whether it is a locality or the name of a collector. 



