110 CALIFORNIA ACADEMY OF SCIENCES. 



gin of the dorsal spine with recurved notches, the inner margin 

 with short recurved teeth. Dorsal I, 6 or 7. zungaro 77. 



ff. Teeth of the pectoral spine scarcely shorter than the width of 

 the spine, those of the outer margin extrorse, those on the inner 

 margin retrorse; the spine ending in a sharp point. Depth of the 

 intermaxillary band of teeth near the middle 6 in its width. An- 

 terior margin of the dorsal spine without notches, but with teeth 

 which are straight or point toward the tip, the inner margin 

 smooth. acanthochira 78. 



73, Pseudopimelodus alexandri. 



Lophiosilurus alexandri Steindachner, SB. Ak. Wien, Ixxiv, 1876, 



Ichthyol. Beitr. v, 106, pi. xv (? Amazon). 

 Pseudopimelodus agassizii Steindachuer, Fisch-Fauna des Cauca 



and Fliisse bei Guayaquil, 9, 1880 (name only). 

 Habitat: Rio San Francisco. 

 One specimen .24 m. Januaria. 



74. Pseudopimelodus parahybae, 



2. Pseudopimelodus charus Steindachner, SB. Ak. Wien, Ixxiv, 



1876, Siisswasserfische Siiddstl. Bras, iii, 74 (Rio Parahyba; Santa 



Cruz). 

 Pseudopimelodus parahybc? Steindachner, Fisch-Fauna des Cauca & 



Fliisse bei Guayaquil, 8, 1880, pi. i, figs. 2-26 (Rio Parahyba; 



Santa Cruz); Eigenm. & Eigenm. Proc. Cal. Acad. Sci. 2d Ser. 



vol. i, 1888, 122 (Santa Cruz). 

 Habitat: Rio Parahyba north to the Rio Doce. 



This species resembles very closely in color Pseudopim- 

 elodus acanthochira Eigenm. & Eigenm. 



Width behind humeral process about equal to the 

 depth, tapering to the caudal peduncle. Head depressed, 

 about as wide as long, somewhat flattened above. Fon- 

 tanels as in bufonius. Occipital process meeting the 

 much longer dorsal plate. Head with large round pores. 

 Eye very small. Width of mouth at the angles more 

 than half the length of the head. Intermaxil- 

 lary band of teeth very narrow, without a 

 backward projecting angle. ^ 



Humeral process strong, about reaching the middle of 

 the pectoral spine. Distance of dorsal spine from tip of 

 snout 2^ in the length, the spine smooth in front, about 2 

 in head. Distance of the adipose from the dorsal fin. 



