486 On Three neio Freshwater Fishes, 



5 to 5| times in total length ; pec- 

 toral as long as head or slightly 



shorter, reaching a little beyond [(Cameroon), 



origin of ventral ; Sq. 47-55 ^f^ . . 4. N. hitermedius, Blgr., 1903 

 Head not deeper than broad; depth of 

 body 5 to 6 times in total length ; 



pectoral shorter than head; Sq. [(Nile). 



50-55 I 5. N. nilotims, Joann., 1835 



Head not deeper than broad ; depth of 

 body 6i to 7| times in total length ; 



pectoral shorter than head ; Sq. [(Cono-o). 



52-57 3 Q. N. eloJigatus, Blgr., IQOo" 



B. Lateral line incomplete, reduced to a few tubercles ; Sq. 50 -f ; 



length of head 4 times in total length. 



7. N. ocelUcauda, Blgr., 1907 



[(Cameroon). 



ir. Dorsal originating well in advance of ventrals, with 11 or 12 

 branched rays ; head deeper than broad, 4 to 4^ times in total 

 length ; depth of body 4| to 5 times in total length ; pectoral 

 shorter than head. 



Sq. 48-49 ^fc S. N- ('^n/^,B]gr., 1902 (Congo) 



Sq. 62 ^^ 9. N. dimidiatns, Pellegr., 1904 



^ [(Casamanza). 



Barhus calliiHerus. 



Depth of body 3 to 3^ times in the total length, length of 

 liead 3^ to 3§ times. Snout rounded, not longer than eye, 

 the diameter of which is 2| to 3 times in length of head and 

 equals interorbital width ; mouth terminal ; lips moderately 

 developed, interrupted on the chin ; barbels two on each side, 

 subequal, | to ^ diameter of eye. Dorsal III 8, last simple 

 ray flexible, not enlarged, nearly as long as head ; free edge 

 of fin slightly concave ; its distance from occiput less than its 

 distance from caudal fin. Anal III .5, longest ray f to f 

 length of head. Pectoral a little shorter than head, not 

 reaching ventral ; latter below anterior half of dorsal. Caudal 

 peduncle about once and ^ as long as deep. Scales 25-26 |f, 

 2 between lateral line and ventral, 8 or 10 round caudal 

 peduncle. Yellow, brownish on the back, the dorsal and 

 lateral scales dark brown at the base ; dorsal fin orange in 

 the basal half, white in the distal half, with a large deep 

 black spot between the last simple ray and the third branched 

 ray ; other fins white, the caudal orange at the base. 



Total length 73 mm. 



Four specimens from Akok, Kribi River. 



