ALESTES. 203 



width about 2J times in length of head ; maxillary not quite extending 

 to below anterior border of eye ; 14 teeth (|) in upper jaw, 8 or 10 (-^-) 

 in lower ; lower border of second suborbital as long as eye. Gill-rakers 

 moderately long, 12-14 on lower part of anterior arch. Dorsal II 8, 

 originating above first or middle rays of ventral, at equal distance from 

 end of snout and from caudal, or a little nearer former, some of the rays 

 produced in males, longer than head. Anal III 19-21. Pectoral f to 

 ■f length of head, not reaching ventral, the outer branched ray of which 

 is produced in males. Caudal forked, with pointed lobes. Caudal 

 peduncle a little longer than deep. Scales with radiating and arborescent 

 or anastomosing canals, 24-29 ||, 2 between lateral line and root of 

 ventral. Silvery, back brown or olive ; a black band on caudal peduncle, 

 extending on caudal fin ; vertical black lines sometimes present on the 

 body ; dorsal and caudal yellow in females, red in males. 



Total length 110 millim. 



Sierra Leone to Congo. 



1-5. Types. Sierra Leone. 



6. Skel. „ 



7-16. Ad. & hgr. Freetown, Sierra Leone. R. Dinzey, Esq. (P.). 



17. Skel. „ „ „ 



18-19. Ad. Sapelle, Lower Niger. Dr. W. J. Ansorge (C). 



20-22, 23-24. Ad. Kribi R., S. Cameroon. G. L. Bates, Esq. (C). 



25-29. Ad. & hgr. Benito R. 



150-36. Hgr. Ogowe R. Miss Kingsley (C). 



37-38. Ad. Sette Cama, Gaboon. 



39. Ad. Stanley Falls. Rev. W. H. Bentley (C). 



10. ALESTES CHAPERI. 



Sauv. Bull. Soc. Zool. France, 1882, p. 320, pi. v. fig. 3. 



Alestes longipinnis, part., Giinth. Proc. Zool. Soc. 1902, ii. p. 338. 



Depth of body 2§ to 3^ times in total length, length of head 3^ to 4 

 times. Head twice as long as broad, as long as deep ; snout shorter 

 than eye, which is lateral and 2^ to 2-f times in length of head ; inter- 

 orbital region convex, its width 2J to 2f times in length of head ; 

 maxillary extending to below anterior border of eye ; 14 teeth (g) in 

 upper jaw, 10 (|) in lower ; lower border of second suborbital as long as 

 or a little shorter than eye. Gill-rakers moderately long, 12-13 on 

 lower part of anterior arch. Dorsal II 8, originating just behind vertical 



