KNOBBED SILURE. 1 5 



top by roiighish bony plates, marked into separate 

 divisions, and terminating in a point behind : first 

 ray of the dorsal and of the pectoral fins extremely 

 strong and serrated: beards six: lateral line flexuous: 

 adipose fin small, and placed near the tail, which is 

 short and rounded. Native of South America. 



KNOBBED SILURE. 



Silurus Nodosus. S. olivaceus^ suhtus argenteus, pimice dorsali^ 

 hasi gibhosa. 



Olivaceous Silure^ silvery beneath^ v/ith the base of the dorsal 

 fin gibbous. 



Silurus nodosus. S. radio primo dorsali nodoso. Block, t. 308. 



Length about a foot : habit lengthened : head 

 and foreparts rather large : eyes moderately large : 

 mouth wide, and furnished with six cirri, of which 

 the two upper ones are of' considerable length : 

 lateral line flexuose: first ray of the dorsal and 

 pectoral fins very strong and serrated ; tail deeply 

 forked. Native of the Indian rivers. 



