SOUTH AMERICAN NEMATOGNATHI. 425 



394. Cochliodon cochliodon. 



Hypostomus cochliodon Kuer, Hypostomiden 265, pi. ii, fig. 1 (Kio 



Cujaba). 



Plecovtomus cochliodon Giinther, v, 238 (copied). 

 Cochliodon cochliodon Eigeiim. & Eigenm. Proc. Cal. Acad. 2d Ser. 



ii, 44, 1889. 



Cochliodon hypostomus Heckel (MS.). 

 Loricaria melanoptera Natterer (MS.). 

 Habitat: Kio Cujaba. 



This species is known only from the types about .19 

 m. long in the Vienna Museum. 



Occiput and sides strongly keeled; ventral surface gran- 

 ular. Yellowish brown, head and fins with dark spots. 

 Head little more than 3 in the length. D. I, 7; A. I, 4. 

 (Kner.) 



LXXXVII. PANAQUE. 



Panaque Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 

 ii, 44, 1889 (nigrolineatus}. 



Type: Chcztostomus nigrolineatus Peters. 



This genus is characterized by its large teeth and in- 

 teropercular spines. The type, P. nigrolineatus, is called 

 Panaque in Venezuela. 



Habitat : Cauca ; Upper Amazon ; Goyaz and Venezuela . 



ANALYSIS OF THE SPECIES OF PANAQUE. 



a. Ventral surface entirely covered with granular scutes; A. 5; occiput 

 arched; orbit about 4 in the interorbital. 



b. Depth about 3% in the length; base of dorsal equals its distance from 

 the middle caudal rays. Dark brown, everywhere with wavy longitu- 

 dinal lines of white, the fins colored and striped like the body. 



nigrolineatus 395. 



bb. Depth about 4f in the length; base of dorsal equals its distance from 



the posterior margin of the adipose. Uniform bluish gray; ventral 



surface lighter, fins all uniform in color. cochliodon 396. 



aa. Ventral surface with only a few granulations behind the throat; A. 4; 



occiput flat; eye 2 in the interorbital; caudal forked, the lower lobe 



much longer. dentex 397. 



