ANNOTATED LIST OF THE SPECIES 
Maranon to the Orinoco and Paraguay 
15656, 1, 238 mm., Iquitos, Allen, 1920. 
15760, 1, 300 mm. to base of caudal, Manaos, Allen, December, 1920. 
15761, 1, 227 mm., Contamana, Allen, August, 1920. 
15762, 1, 129 mm., Lago Cashiboya, Allen, August, 1920. 
15956, 1, 253 mm., Iquitos, Morris, 1922. 
Genus 25: SORUBIMICHTHYS Bleeker 
Platystoma Agassiz (part), 1829, Sel. Gen. et Spec. Pisce. Bras., sp. 
Sorubim Spix (part), 1829, Sel. Gen. et Spec. Pisce. Bras., sp. 
Sorubimichthys Bleeker, 1863, Nederl. Tijdsch. Dierk., I, 98, jandia = spatula; 
Eigenmann and Kigenmann, 1890, Oec. Papers Cal. Acad. Sci., I, 214; 
Figenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 392. 
Type: Platystoma spatula Agassiz 
Orinoco and Amazon systems 
Snout much projected and very broad; eyes superior; teeth of upper jaw in a 
very deep band, those of roof of mouth in two patches; barbels fleshy; adipose 
shorter than anal. 
59. SORUBIMICHTHYS PLANICEPS (Agassiz) 
Platystoma planiceps Agassiz, 1829, Sel. Gen. et Spec. Pisce. Bras., 25, Rio Negro to upper Amazon; 
Cuvier and Valenciennes, 1840, Hist. Nat. Poiss., XV, 19, Brazil. 
Sorubimichthys planiceps Eigenmann and Eigenmann, 1888, Proc. Cal. Acad. Sci., (2), I, 139; 
Eigenmann and Kigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 215; 
EKigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 392. 
Sorubimichthys ortoni Gill, 1870, Proc. Acad. Nat. Sci. Phila., XXII, 94, Napo or Maranon basin. 
Amazon and Orinoco basins 
60. SoRUBIMICHTHYS GIGAS (Gunther) 
Platystoma gigas Giinther, 1872, Ann. Mag. Nat. Hist., X, 449, Huallaga. 
Sorubimichthys gigas Eigenmann and Eigenmann, 1888, Proc. Cal. Acad. Sei., (2), I, 189; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sei., 1, 217; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, ITI, 392. 
Rio Huallaga 
May be identical with S. planiceps. 
Subfamily: LUCIOPIMELODINAE 
With air-bladder reduced and separated from the skin by a fatty layer, 
forming a pseudo-tympanum; divided anteriorly into two small lobes. 
Genus 26: PERUGIA Eigenmann and Norris 
Perugia Eigenmann and Norris, 1900, Revista Mus. Paulista, IV, 355; 
Driver, 1919, Proc. Amer. Phil. Soc., LVIII, 448-456; 
Eigenmann, 1922, Mem. Carnegie Mus., IX, 34. 
not 
