SOUTH AMERICAN NEMATOGNATHI. 279 



tral surface; vertical fins variously marked; ventral and 

 pectoral fins sometimes light colored, sparingly spotted 

 with brown, sometimes very dark, the upper surface al- 

 ways the darker. 



Head 41-5; depth, below dorsal, 41 -5|; above first 

 anal ray 3|-4|; D. I, 4-5; A. 25-27; V. 6; P. I, 6. 



? specimens differ from the above description in 

 having the dorsal spine much shorter than the pectoral 

 spine, 6-7 in the length, both margins smooth or the 

 outer slightly serrate, the first soft ray higher than the 

 spine; the serrations on the outer edge of pectoral spine 

 are occasionally reduced to granulations; the anterior 

 anal rays normal. The head is less flattened. 



Fifty specimens, .075-. 235 m. Linhares, Rio Doce; 

 Itabapuana; Campos; Sao Matheos; Gurupa. Hartt & 

 Copeland. 



221. Trachycorystes brevibarbus. 



Auchenipterus brevibarbus Cope, Proc. Am. Philos. Soc. xvii, 676, 



1878 (Peruvian Amazon). 

 Trachycorystes brevibarbus Eigenm. & Eigenm. Proc. Cal. Acad. 2il 



Ser. i, 155, 1888 (name only). 

 Habitat: Marafion. 



222. Trachycorystes galeatus. 



Silurus (jalealus Linmeus, Syst. Nat. ed. xii, 503, 1766 (based on 

 Seba, iii, pi. 29, fig. 7); id. ed. xiii, 1357, 1788; Bloch, Auslau- 

 dische Fische, part 8, 39, pi. 369, fig. 1, 1794; Bloch & Schneider, 

 "Syst. Ichthyol. 384, 1801." 



Pimelodus galeatus Lacepede, Hist. Nat. Poiss. v, 97 and 114, 1803 

 (South America). 



Auchenipterus galeatus Giiuther, Cat. Fish. Brit. Mus. v, 196, 1864 

 (Guiana); Peters, MB. Ak. Berl, 470, 1877 (Calabozo). 



Paraucherdpterus galeatus Bleeker, Nederl. Tijdschr. Dierkunde, i, 

 88, 1863 (name only). 



Trachycorystes galeatus 'Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 

 i, 155, 1888 (Peruambuco; San Goni^allo; Rio San Francisco, be- 

 low the falls; Tabatinga; Teffe; Rio Puty). 



Aucheriipterus maculosus Cuv. & Val. Hist. Nat. Poiss. xv, 216 

 (Cayenne), Kner, SB. Ak. Wien, xxvi, 425, 1857 (Marabitanos); 

 Giinther, Cat. Fish. Brit. Mus. v, 196, 1864 (Surinam, Esse- 

 quibo); Vaillant, Bull. Soc. Philom. series 7, iv, 154 (Calderon). 



