172 gangetic fishes. Order V. 



twenty rays in the fin behind the vent ; with teeth in the pa- 

 late; and with opaque sides marked with short transverse 

 lines. 



The Nenga [Nenga gagora) is a fourth species equally allied 

 to the last four as they are to each other, and found in the 

 same places. Besides the circumstances mentioned in the spe- 

 cific character, it differs from the Gagora as follows : 



The colour is golden, with a dusky shade on the back. All 

 the fins are yellowish, stained with black. On each side, above 

 the lateral lines, are some short vertical marks. The bones, 

 covered with teeth, are situated on the middle of the palate, 

 close to each other. The tendrils extend beyond the pectoral 

 fins. The bony plate on the head and shoulders wants the 

 ridges that go to the nostrils, and its hinder branches are 

 shorter. The foremost seven rays of the fin behind the vent 

 are undivided. 



9th Species. — Pimelodus sona, 

 A Pimelodus with six tendrils longer than the head ; with 

 the tail fin divided into two lobes ; with nine rays in the 

 first fin of the back, the prickle being indented on both sides, 

 and ending in a flexible point much longer than the mem- 

 brane ; with eighteen rays in the fin behind the vent ; and 

 with opaque spotless sides. 



This is still another kind found in the same places, and so 

 nearly allied to the above, that, besides the differences men- 

 tioned in the specific character, I shall only notice the circum- 

 stances in which it differs from the description of the Gagora. 

 The gloss on its sides is golden. The two upper tendrils, and 

 the two outer of those below the chin, reach to the end of the 

 pectoral fins. The teeth are sharp. The eyes are oblong, with 



