SOUTH AMERICAN NEMATOGNATHI. 187 



in front of the anal; anal emarginate. Maxillary bar- 

 bel reaching past base of ventrals. 



Head 3j; D. I, 6; A. 14. (Steindachner.) 



XXVI. PLATYNEMATICHTHYS. 



Platynematichthys Bleeker, Nederl. Tijdschr. Dierk- 

 unde, i, 1863, 99 (punctulatus). 



Type : Bagrus punctulatus Kner. 



Both jaws with very broad bands of teeth; vomer with 

 a broad band of teeth; palatines edentulous. Barbels 

 broad, band-like; occipital process reaching to the dorsal 

 plate. Surface of the bones of the skull furrowed and 

 granulate but covered with skin. 



136, Platynematichthys punctulatus, 



Bagrus punctulatus Kiier, SB. Ak. Wien, xxvi, 1857, 380 (Forte do 



Principe, Bio Guapore; Eio Branco). 

 Platynematichthys punctulatus Bleeker, 1. c. (name only); Giinther 



Cat. Fish. Brit. Mus. v. 112, 1864 (copied). 

 Bagrus nigripunclatus Kner, Wiegm. Arch. 1858, 345. 

 Habitat: Amazon; Solimoens and their tributaries. 



Rictus under the anterior edge of the orbit. Jaws 

 equal. Vomerine band of teeth widest at the outer 

 edges, little more than half as wide as the intermaxillary 

 band. Eye nearer snout than free edge of opercle, 4 4J 

 in interorbital. Maxillary barbels extend to the middle 

 of the opercle. Dorsal and anal emarginate. Base of 

 the adipose fin. shorter than the anal. Pectoral spine 

 with fine teeth on its outer edge, with strong teeth on 

 its inner edge near the tip; it reaches the vertical from 

 the end of the dorsal fin. Sides and back brown with 

 black spots, lower parts white. Fins immaculate. 



Head 5 in the total; Br. 8-9; D. I, 6; A. 16 (Kner). 



137. Platynematichthys ? araguayensis. 



Oaleichthys araguayensis Castelnau, Anim. Am. Sud Poiss. 37, plate 



17, fig. 3, 1855 (Araguay Kiver). 

 Platynematichthys araguayensis Eigenm &Eigenm, Proc. Cal. Acad. 



2d Ser. i, 135, 1888 (name). 



