Braziliiiii Callisli^s of tlie km FLEC0SÏÛ111S, 

 from (lie Sluseii I'aiilisla 



BY 



JOHN TREADWELL NICHOLS 



During his stay in Brazil from 1917 to 1918, 

 Dr. diaries R. Eastman visited the Museu Paulista 

 in São Paulo, and arranged that a collection of 

 fresh-water fishes be sent from there for study at 

 the American Museum of Natural History. This 

 collection contained many catfishes, sixty-five of 

 which are referable to the genus Plecostomus. These 

 represent ten species, of which three appear to be 

 undescribed. The present review of this material 

 fellows Regan's monograph of the L- ricariida\ [ 1 ). 



Piecostoimis yuaeari ( Lacépède ). 



Two espécimens 6 y to 6 y inches long to 

 base of caudal, from the Slate of Maranhão ; ten of 



1 Y to 5 — inches, from the State of São Paulo, 



one 4 — inches from the State of Rio Grande do 

 Sul. Some of those from São Paulo have the adi- 

 pose more separated from the caudal, its distance 

 from that fin being about equal to its length, resem- 

 bling commersonii in this character, which does 

 not hold throughout the material, (^owever. 



No color remains in most of our material. All 

 of it fits in Plecostomus guacari as diagnosed in 

 Regan's monograph of the family, wdth range fur- 

 ther north, and we can not identify it with any of 

 the species since described, except possibly P. pusa- 



(1). Traus. Zool. 8oc. London, 1903, XVII. pp. 191-350. 



