HERZBERGIAN SILURE, 13 



long, on the lower short : dorsal fin narrow, with 

 the first ray serrated at the base, and continued 

 into a long filament extending to the tail : at some 

 distance beyond the dorsal fin a single insulated 

 filament, rising from the middle of the back: pecto- 

 ral fins similar to the dorsal, but the first ray not 

 so long : adipose fin small, and situated near the 

 tail, which, as well as the rest of the fins, is of a 

 pale red, and deeply forked : anal fin bilobate : 

 ventral longish, and rather small. Native of the 

 Indian rivers : seems to vary as to the number of 

 beards on the mouth, which are either four or six. 



HERZBERGIAN SILURE. 



Silurus Herzbergii. S. olivaceus, abdomine argenteo, pinnis 

 pectoralibus dorsalique radio primo serrato, caudafurcata. 



Olivaceous Silure, with silvery abdomen, first ray of dorsal 

 and pectoral fins serrated, and forked tail. 



Silurus Herzbergii. S. corpore argenteo, radiis tredecim in 

 pinna ani. Block, t. 367. 



LENGTH from twelve to eighteen inches; and 

 probably much more in the full-grown fish : habit 

 resembling that of Silurus Bagre and inermis : 

 mouth furnished with six beards, the upper pair 

 being of considerable length : first dorsal fin rather 

 small, with the first ray very strong, and serrated : 

 pectoral fins of similar appearance : adipose and 

 ventral fin placed opposite : tail deeply forked. 

 Native of the South- American rivers. 



