18 CALIFORNIA ACADEMY OF SCIENCES. 



Dr. Steindachner says in the description that this 

 species has eight anal rays; the figure shows only five. 



Tail long and slender. Head and body greatly de- 

 pressed, the depth at the occiput 2 in the distance from 

 the tip of snout to base of pectoral. Nuchal plate a 

 thin, low crest; crests and ridges of the head low, not 

 prominent. Greatest width in front of the pectorals 

 little more than 3 in the length. Profile somewhat de- 

 pressed behind the eyes. 



Interorbital width equals the snout plus the eye. 



Maxillary barbels reaching about to base of pectorals, 

 mental to the postmental barbels which equal the in- 

 terorbital. 



Teeth small, villiform, in two patches in each jaw. 



Coracoid processes converging slightly, at least as 

 long as the distance between their bases. 



Pectoral pore present. 



Upper surface of the head comparatively smooth; 

 snout, lower surface and the tail thickly covered with 

 warts. 



Distance of dorsal fin from tip of snout 2^ in the 

 length. 



Pectoral spine reaching the ventral fins, its margins 

 with recurved hooks. 



The larger specimen is dark grayish-brown; the 

 smaller light brown, the markings similar in both; top 

 of head and nape light, spotted with dark; tail darker, 

 three light areas on its dorsal surface; belly spotted with 

 lighter; fins dark brown, the tips of the rays light. 



A. 7-8. 



Two specimens .05-. 073 m. Cudajas; Jutahy. Thayer 

 Expedition. 

 6. Bunocephalus melas. 



Bunocephalufi melas Cope, Proc. Acad. Nat. Sci. Philad. 1874, 132 (Nauta); 

 id., Proc. Am. Phil. Soc. 17, 1878, 681 (Nauta); E. & E. Proc. Cal. Acad. 

 Sci. 2d Ser. ii, 1889, 48. 



Habitat: Peruvian Amazon . 



