138 CALIFORNIA ACADEMY OF SCIENCES. 



XX. Hemisorubim Bleeker. 



78. Hemisorubim platyrhynchos (Guv. &Val.) 



Localiiies: Manacapuru; Kio Negro; Montalegre; Rio Putj'; Lago 

 Alexo; Obidos; Coaiy; Tabatinga; Hyavary; Tonantiusj Sao Paolo. 



XXI. PsEUDOPLATYSTOMA Bleeker. 

 HemipJaty stoma Bleeker. 



79. Pseudoplatystoma fasciatum (Linnaeus) (in part.) 



? Platyslo7na truncaium Agaasiz; Platystoma pMncii/er Casteluau. 

 Localities: Obidos; Coary; Hyavary. 



79 (a). Pseudoplatystoma fasciatum intermedium vav. nov. 

 Type, No. 7321, one specimen, .42 m. long. Obidos. 



Maxillary barbels not reaching to the dorsal, mental bar- 

 bel not to the pectoral, post-mentals to middle of pectorals. 

 Vomerine teeth narrowly joined. 



Lower parts white, upper parts brownish, with numerous 

 narrow, dark wavy lines extending to the edge of the belly; 

 dorsal, pectoral and ventral fins plain yellow; caudal with 

 round brown spots, the anal with a very faint dusky spot at the 

 base of the last rays and an obscure streak on the tip of the 

 rays; head with small round brown spots. 



79 (b). Pseudoplatystoma fasciatum tigrinum (Cuv. & Val.) 



Locality: Obidos. 



80 Pseudoplatystoma coruscans (Agassiz.) 



Sorubim capnrary Spix; Platystoma pardalis Valenciennes; Platys- 

 toma punctatiim Cuv. & Val.; Platystoma orbignianum Valencien- 

 nes; Platystoma forschhammeri Reinhardt. 



Localities: Manaos; Rio das Velhas; Rio San Francisco, below the 

 falls. 



XXII. SoRUBiM Spix. 

 Plahjstoma Agassiz (name preoccupied in Diptera.) 



81. Sorubim lima (Bloch & Schneider. ) 



Sorubim infraocularis Spix; Platystoma hiceri Weyenbergh. 

 Localities: Manacapurn; San Paolo; Fonteboa; Tabatinga; Hyavary; 

 Teffe; Obidos; Maranon; Ucayale; Iqb; Lago do Manimo; Para; Rio 

 Puty; Jutahy. 



