86 CLASS XIV. 



Brontes YALENC. 



Distinguished from the preceding genua by the absence of a second dorsal 

 fin. Sp. Brontes prenadllla VALENO. 1. 1. PI. 445 ; this fish also lives at 

 great heights in brooks that flow 1 from the Cotopaxi, and is also, as is re- 

 ported, ejected by the Volcano. 



Astroblepus HUMB., YALENC. Dorsal fin single, radiate. Ventral 

 fins none. 



Sp. Astroblepus Ch'ixalvii HUMS., Recueil d'Observ. I. pp. 19, 20. 



Trachelyopterus YALENC. 

 Auchenipterus YALENC. 



Bagrus Cuv. (with the addition of some species of Pimelodus 

 ejusd.). Body naked. Teeth setaceous, crowded in jaws; palatine 

 teeth in some arranged in the vomer in a parallel row, similar to the 

 maxillary, in others at the sides of mouth in the bones of palate 

 and the pterygoids, sometimes globose. Branchiostegous membrane 

 with rays various in number, mostly 6 10. Dorsal fins two, the" 

 second adipose. Cirri 2 8. 



Arius YALENC. Palatine teeth arranged in two lateral groups. 

 Branchiostegous membrane with 5 8 rays. 



Sp. Arius militaris VALENC., Silurus militaris L.? Cov. et VALENC. Hist, 

 des Poiss. XV. PI. 430. Two stiff bony cirri at the upper jaw. BLEEKER 

 has discovered some new species of this division which he unites under the 

 generic name of Osteogeneiosus. In the remaining species the cirri are mem- 

 branous and flexible ; many of these species occur in America, others in the 

 East Indies, as Arius rita VALENC. 1. 1. PI. 429. 



Bagrus Cuv. Palatine teeth crowded in a continuous parallel 

 row behind the teeth of upper jaw. 



Silundia YALENC. Two small cirri. Adipose fin small, anal long. 

 Branchiostegous membrane with 12 rays. 



Pangasius VALENC. Cirri 4. Branchiostegous membrane with 10 rays. 



Galeichthys VALENC. Head rotundate. Branchiostegous membrane with 

 6 rays. Cirri 6 or 4. 



Platystoma, AGASSIZ. Snout depressed. Branchiostegous membrane with 

 1 6 or 17 rays. Cirri 6. 



Phractocephaliis AGASS. Branchiostegous membrane with 9 rays. Cirri 6. 

 Osseous rays imperfect in the upper margin of adipose fin. 



JBagrus VALENC. Branchiostegous membrane with 8 10 rays. Cirri 6 

 or 8. Adipose fin without rays. 



