A m CEil'S OF LOIÍICIIÍIID CATFISIIES 



by John Treadwell Nichols 



This is the second short paper based on a col- 

 lection of fresh-water fishes courteously loaned 

 by the Museu Paulista to the American Museum 

 of Natural History in New York, for study at that 

 institution. It is interesting to find yet rinolher new 

 genus of catfishes of this family in tiie waters of 

 south eastern Brazil where tiiese forms are so rich- 

 ly represented. 



PseiidoloeinclHS, neio (jenus 



Loricariid Catfish with the appearance of Ple- 

 cosior/iHS, but with the marginal part of tlie lower 

 transverse portion of the coracoids exposed as a 

 rough more or less long diamond-shaped plate sub- 

 tending the base of the pectoral. The coracoid- 

 clavicle bridge between the pectorals elsewhere very 

 near the surface but covered with skin. Margin 

 of snout covfred with small grar.ular plates as in 

 Plecostomus. Anterior scutes of lower lateral series 

 separated trom the teiïiporal plate by an elongate 

 naked area. Premaxiliaries and dentaries with about 

 the same number of close set, slender, lîioveable 

 teeth. Operculum and interoperculurn not indepen- 

 dently moveable, 'temporal plates perforated as in 

 Otocinclus. This genus is peculiarly intermediate 

 between the sub-families Plecostomin;p and Hy- 

 poptopomatina' as defined by Began ; ( 1 ) its clo- 

 sest afiinities seem to be with Oiocinclus of the lat- 

 ter subfamily. 



( 1 ). Mouograph t f the Loricarida', 1904. 



