SOUTH AMERICAN NEMATOGNATHI. 155 



pectorals. Gill-membranes separate to below anterior 

 margin of eye. 



Humeral process extending to middle of pectoral spine. 



Eye Ih in snout, 4 in head, nearer opercular margin 

 than to snout. 



Dorsal spine nearer snout than to the anal, its height 

 1^ in head; the highest ray about equal to the length of 

 the head. Adipose fin 4 in the length, its distance from 

 the dorsal equals three-fifths of its basis. 



Caudal about 4 in the length. Free margin of anal 

 rounded, the highest ray If in head. 



Ventrals behind the vertical from the last dorsal ray, 

 their tips one-third their length from the anal. 



Pectoral spine equal to length of head, the tips of the 

 rays one-half their length from the ventral. 



Uniform light brownish. 



Head4|; depth 5|; Br. 6; D. I, 6; A. 12. 



Type: No. 7508 .19 m. Campos. Hartt & Copeland. 



112. Pimelodella modestus. 



Pimelodus modestus Giinther, Proc. Zool. Soc. Lond. 28, 239, pi. x, 

 fig. C, 1860 (Esineraldas); id. Cat. Fish. Brit. Mus. v, 117, 1864 

 (Esmeraldas); id. Fish. Central America, 393, 1866 (Rio Chagres; 

 Esmeraldas). 



Pimelodella modestus Eigenm. & Eigeum. Proc. Cal. Acad. 2d. Ser. 

 1, 133, 1888 (name). 



Habitat: Elvers of Western Ecuador and Eastern Panama. 



This species is known to us only from the plate and 

 description by Dr. Giinther. 



113. Pimelodella elongatus. 



Pimelodus elonijatus Gunther, Proc. Zool. Soc. Lond. 28, 238, pi. x, 

 fig. B, 1860 (fresh waters of the Esmeraldas); Giinther Catal. 

 Fishes Brit. Mus. v, 118, 1864 (Esmeraldas). 



Pimelodella elongatus Eigenm. & Eigenm. Proc. Cal. Acad. 2d. Ser. 

 i, 133, 1888 (name only). 



Habitat: Rivers of Western Ecuador. 



This species is known to us only from the plate and 

 description by Dr. Giinther. 



