290 CALIFORNIA ACADEMY OF SCIENCES. 



Body elongate compressed, depth much greater than 

 the width. Head short and blunt, its greatest depth 

 about equal to its width, which is H in its length; width 

 at rictus 1-|. Top of head with pores as \\\ jeqnitinhonluti. 

 Sutures distinct. 



Maxillary barbels variable, about reaching tip of 

 pectorals; mental barbel reaching to the second third of 

 the pectoral; postmental beyond middle of pectoral; all 

 the barbels somewhat shorter in the largest specimens. 



Inter-dorsal space 2|-2i in the length. 



First anal ray, in the 6 , greatly lengthened, the 

 urogenital canal at its tip with a bladder-like expansion. 



Dark brown, the color of the dorsal surface darker 

 and uniform; on the sides lighter, composed of rather 

 large brown dots; ventral surface white; numerous dark 

 dots on the basal half of the dorsal fin; adipose fin 

 dotted; caudal fin dusky; basal half of the anal, and 

 basal half of the inner surfaces of the pectoral and ven- 

 tral fins sparingly dotted. 



Head 4^1; depth 5; D. I, 6; A. 21; V. 8; P. I, 6. 



In other respects this species agrees with the descrip- 

 tion of Felichthys flavescens. 



Seven specimens; lengths .10-. 12 m. Sao Matheos. 

 Hartt & Copeland. Two specimens .13 m. Para. 

 Agassiz and Bourget. 



230. Felichthys uodosus. 



Silurus nodosus Bloch, Auslaudiriche Fische, part 8, 35, pi. 368, tig. 



1, 1794 (Trauquebar); Bloch & Schuelder, " Syst. Ichthyol. 383, 



1801." 

 Arius nodosus Cuv. & Val. Hist Nat. Poiss. xv, 70, 1840 (copied). 

 Auchenipterus nodosus Mtiller & Troschel, Horas Ichthyol. iii, 11, 



1849 (?); Kuer, SB. Ak. Wien, xxvi, 424, 1857 (Surinam); Giiu- 



ther, Cat. Fish. Brit. Mus. v, 194, 1864 (British, Dutch, and 



French Gviiaua). 

 Pseudaiichenipterus nodosusBleekev, Nederl. Tijdschr. Dierkuude, i, 



88, 1863 (name only); id. Silures de Suriname, 43, pi. xi, fig. 1, 



pl.xiii, fig. 6, 1864 (Surinam). 



