ALESTES. 



21- 



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

 long, 16-18 on lower part of anterior arch. Dorsal II 8, originating 

 above middle of base of ventral, at equal distance from end of snout and 

 from caudal, or a little nearer latter; longest ray shorter than head. 

 Anal III 12-13. Pectoral f to -f length of head, not reaching ventral. 

 Caudal forked, with pointed lobes. Caudal peduncle 1^ to 1^ times as 

 long as deep. Scales with radiating and arborescent or anastomosing 

 canals, 24-25 gf, 2 between lateral line and root of ventral. Silvery, back 

 brownish ; a more or less distinct dark spot behind the head, above the 

 lateral line, and a black band on the side of the caudal part of the 

 body, extending on the middle caudal rays. 



Total length 100 millim. 



Ogowe River, Congo. 

 1-4. Types. Ogowe. Miss Kingsley (C). 



5. Hgr. Ombrokua, Ogowe. Dr. W. J. Ansorge (0.). 



6-7. Yg. Kondue, Lower Congo. M. Luja (C). 



17. ALESTES BIMACULATUS. 

 Bouleng. Ann. Mus. Congo, Zool. i. p. 85, pi. xxxvi. fig. 3 (1899), and Poiss. Bass. 

 Congo, p. 157 (1901). 

 Depth of body 3-|- to 3f times in total length, length of head 3|- to 

 3f times. Head twice as long as broad, a little longer than deep; 



Fig. 160. 



Alestes bimaculatus. 

 Type (A. M. C). f 



snout as long as or a little shorter than eye, which is lateral and 3 to 

 31 times in length of head ; no adipose eyelid ; interorbital region feebly 

 convex, 2 to 2^ times in length of head ; maxillary not reaching anterior 



