210 



CALIFORNIA ACADEMY OF SCIENCES. 



Eye 13 in head, 4-6 in snout, 2-3 in interorbital, 

 about 4 diameters behind the angle of the mouth. 



Teeth all alike, those 

 in the lower jaw in a 

 narrow band of uniform 

 depth; those of the up- 

 per jaw in a band which 

 is much shallower at 

 the middle. Vomerine 

 patches slightly sepa- 

 rate along the median 

 line. 



Dorsal spine nearer 

 to end of adipose than to tip of snout; slender, serrate 

 behind and near tip in front. Adipose fin shorter than 

 the anal, placed above the first 8 rays. 



Ventrals extending one-half their length beyond the 

 vent; distance from vent to caudal equals length of head. 



Pectoral spine with strong recurved teeth on its entire 

 inner margin, a few teeth near tip in front; 2-J in head. 



Head 2|-2|; depth 7J-7J; Br. 14-15; D. I, 6; A. 11-13. 



About twenty specimens. Coary; Hyavary; Hyan- 

 uary; Jutahy; Teffe; Rio Puty; Obidos. 



152 a. Pseudoplatystoma fasciatum nigricans. 



P.f. nigricans E. & E. Proc. Cal. Acad. Sci. 2d Ser. ii, 31, 1889. 

 Types: No. 7301 and 7311; two specimens .40-. 60 m. Xiugu. 

 Habitat: Xingu. 



This variety is known only from the types; it is con- 

 fined to the Xingu river. 



152 b, Pseudoplatystoma fasciatum brevifile, 



P. f. brevifile E. & E. Proc. Cal. Acad. Sci. 2d Ser. ii, 31, 1889 



(Goyaz). 



Type: No. 7317; one specimen, .62 in. Goyaz. 

 Habitat: Goyaz. 



152 c, Pseudoplatystoma fasciatum intermedium, 



P.f. intermedium Eigenin. & Eigenm. Proc. Cal. Acad. 2d Ser. 



i, 138, 1888 (Obidos). 

 Four specimens, .37-. 65 m. Obidos; Rio Puty. 



