SERRASALMO SCOTOPTERUS. 233 



The upper part of the body is bluish grey, shading 

 to white or silvery above the lateral line, continu- 

 ing thence over the belly and vent, and towards the 

 tail becoming yellowish. The two dorsal fins and 

 tail are blackish brown; the first has an anterior 

 spine, and a distinct dark band nearly through the 

 centre ; the latter is considerably forked, and darkest 

 near the base. The three lower fins are umber- 

 brown, the anal darkish toward the tip, and thence 

 slightly tinted with light red. The iris is coloured 

 yellow. 



" Taken in the river Padauiri, in January ; grows 

 to six inches in length, and takes bait. Scales 

 small, fringed, deciduous; tongue round, fleshy; 

 teeth, single row, sharp, triangular, serrated; air- 

 bag double. Food, the roe of other fish." 



D. 17— P. 13— V. 6— A. 32— C. 28— Br. 4— Ribs, 12 pairs, 

 large— Vert. 33. 



Serrasalmo SCOTOPTERUS, Dark-finned Saw- 

 BELLiED Salmon. Schomh. Drawings^ No. 64. — 

 This drawing is still more longitudinal in form 

 than the two preceding, but keeps the general cha- 

 racters. The dorsal outline is very undulated, and 

 rises suddenly from the head in a hump ; the head 

 is large, and rather elongated ; the rictus is large, 

 and is supplied with large angular teeth. The ge- 

 neral colour, until slightly below the lateral line, is 

 greyish blue, changing to white or silvery below ; 

 all the fins are very dark, and contrast with the 

 pale greyish blue thit of the body ; the two dorsal, 



