408 



SILURID.^^.. 



long filament, striated and sharp-edged or very finely granulate in front, 

 feebly serrated behind. Adipose dorsal 3 to 4 times as long as deep, 

 2h to 5 times as long as its distance from rayed dorsal. Anal IV 8-9, 

 pointed in front. Pectoral spine as long as or slightly longer than head, 

 not reaching ventral, moderately or rather strongly serrated on outer 

 border, very strongly on inner. Ventral usually reaching anal. Caudal 



Fig. 307. 



Si/)iodoiitis gambiensis. 

 Gambia. |. 



dee})ly forked, upper lobe the longer and more or less produced into a 

 filament. Caudal peduncle as long as deep or deeper than long. 

 Uniform brown above, white beneath ; barbels white ; fins often blackish. 



Total length 240 millim. 



Gambia to Niger, Chad Basin, 



1. Type, had state. 



1-10,11. Ad.,hor.,&skel. 

 12-14. Ad. &yg. 

 ir>-17. Yg. 

 18. Hot. 

 I'.t. Ad. 

 20. A<1. 



21 22. Ad. k h^rr. 

 28 -2.3. Ad., hgr., S: v"-. 

 26. Ad., skin. 



■G'.nnl)ia. 



Jjaoos. 



Oniin ]\. at An). 

 Jehba, Upper Nijior. 

 Mureji, „ 



Assay, Lower Niger. 



Fort LaiHv, Shari K. 

 Lake Chad. 



Lord Derby (P.). 

 J. S. Bndgett, Esq. (V.). 

 Sir A. Moloney (P.). 

 Major G. E. Bruce (P.). 

 C. H. Firniin, Esq. (P.). 

 J. S. Budcrelt, Esq. (P.). 



Dr. W. J. Ansorge (('.). 

 ('ai)t. G. B. Gosling (P.). 



