SOUTH AMERICAN NEMATOGNATHI. 289 



mental barbel to base of pectoral, postmental a little be- 

 yond its base. 



Snout rounded, upper jaw longer; teeth all villiform, 

 arranged as in jequitinhonhce. 



Gill-opening extending to base of pectoral. Humeral 

 process covered with thin skin, somewhat roughened on 

 its surface, extending a little beyond middle of pectoral. 

 Pectoral pore large. Lateral line undulating. 



Distance of dorsal spine from snout 3-| in the length; 

 dorsal spine 1| in the head, its outer margin scarcely 

 roughened, its inner margin slightly serrate; first soft 

 ray If in the head. Distance between dorsal and adi- 

 pose fins 2|- in the length. 



Caudal deeply forked, the lobes pointed, 3| in the 

 length. 



Anal emarginate, the first rays (female) not reaching 

 to base of the last rays. 



Ventrals not reaching the anal, If in the head. 



Pectoral spine slightly shorter than the head, its outer 

 edge and sides smooth, its inner margin strongly ser- 

 rate. 



Back brown, the color composed of numerous brown 

 dots; top of head and snout blotched with brown on a 

 yellow ground; opercle and triangular spot behind the 

 eye yellow; humeral region covered with numerous con- 

 spicuous brown dots; sides and ventral surface yellow; 

 upper caudal lobe dusky, otherwise fins .plain yellow. 



Head 4J; depth 5J; D. I, 6; A. 20; V. 8; P. I, 6-7. 



229. Felichthys affinis. 



Auchenipterus affinis Steindachner, Siisswasserfische Stidostl. Bras, 

 iii, 93, 1876 (Eio Sao MatheosjRio Mucury, near Porto Alegre). 



Felichthys affinis Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. i, 154, 

 1888 (Para; Sao Matheos). 



Habitat: Mouths of the streams draining the eastern part of Mi- 

 lias Geraes; Para. 



19 



