SOUTH AMERICAN NEMATOGNATHI. 265 



Color everywhere dusky; dorsal fin with oblique bars; 

 pectoral and ventral fins nearly black; ventral surface 

 lighter, with rather large brown dots. 



Head 5; depth 3|-4; D. I, 5; A. 32. 



Twenty specimens examined, the largest measuring 

 .105 m. 



Obidos; Porto do Moz. Senhor Vinhas. 



204a. Trachelyopterus coriaceus maculosus, 



Trachelyopterus coriaceus maculosus Eigeiim & Eigenm. Proc. Cal. 

 Acacl. 2d Ser. i, 157, 1888 (Porto do Moz). 



A single specimen from Porto do Moz (No. 7,337) has 

 the sides light brown with longitudinal series of oblong 

 rusty-brown spots. 



XLVI. WERTHEIMERIA. 



Wertheimeria Steindachner, SB. Ak.Wien, Ixxiv, 1876. 

 Siisswasserfische sudostl. Bras, iii, 102, pi. x (maculata). 



Type: Wertheimeria maculata Steindachner. 



Adipose fin as long as the anal fin; gill-opening ex- 

 tending to the lower side of the head. 



205, Wertheimeria maculata. 



Wertheimeria maculata Steindachner, 1. c. (Jequitinhoiiha). 



Bones of the head granular. Eye 7J 8J in the head. 

 Upper jaw slightly projecting; teeth .setiform, none on 

 the palate. Head somewhat wider than long. Maxil- 

 lary barbels extending beyond the first third of the pec- 

 toral, postmentals to its base. A granular plate on the 

 sides between the humeral process and the dorsal plate. 

 Humeral process extending beyond middle of pectoral 

 spine. DorsaJ spine shorter than the head, serrated on 

 its anterior margin. Pectoral spine very long and de- 

 pressed, much longer than the head. Caudal emargi- 

 nate. Pectoral pore present. Back and sides brown, 

 with lighter spots. 



Head 4f; depth 4J-4i; *> I, 6; P. I, 9; V. I, 5-6; 

 A. 15-16. (Steindachner.) 



