SOUTH AMERICAN NEMATOGNATHI. 427 



Pectoral fins reaching beyond base of ventrals. 



Dark brown, everywhere with wavy longitudinal lines 

 of white; the fins all colored and striped like the body. 



Head 2f; D. I, 7; A. 5; V. I, 5; Lat. 1. 25-26. 



Eight specimens .21-. 25 m. Goyaz, Brazil. Senhor 

 Honorio. 



396, Panaque cochliodon, 



Chcetostomus cochliodon (sive gibbosus) Steindachner, Ichthyol. Beitr. 

 viii, 69 (Cauca); id. Fisch-faunades Cauca and Fliisse bei Guay- 

 aquil, ii, pi. iv, figs. 1-la (Cauca). 



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

 44, 1889. 



Habitat: Cauca. 



This species is known only from the descriptions and 

 figures quoted. It seems to be closely related to nigro- 

 lineatus. 



397, Panaque dentex. 



Chcetostomus dentex Giinther, Proc. Zool. Soc. Lond. 1868, 233 



(Xeberos). 

 Panaque dentex Eigenm. & Eigenm. 1. c. 



This species is known only from the description quoted. 



It differs decidedly from nigrolineatus and cochliodon 

 in the shape of its head, covering of the ventral surface, 

 etc. 



LXXXVIII. PTERYGOPLICHTHYS. 



Pterygoplichthys Gill, Ann. Lye. Nat. Hist. New York, 

 vi, 408 (duodecimalis) . 



Liposarcus Giinther, Cat. Fish. Brit. Mus. v, 238, 1864 

 (sp). 



Type: Hypostomus duodecimalis Guv. & Val. 



This genus contains all those species of Plecostominai 

 with a granular snout and ten or more dorsal rays. The 

 interopercle is formed as in Plecostomus, but it is some- 

 times provided with more spines than in that genus. 



Habitat: Rio San Francisco to Rio Magdalena. 



