486 On Three new Freshioater 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 ^^ . . 4. N. intermedim, Blgr., 1903 



Plead not deeper than broad ; depth of 

 body 5 to 6 times in total length ; 



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



50-55 I b. N. niloticus, Joann., 1835 



Head not deeper than broad; depth of 

 body 6^ to 7\ times in total length ; 



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



52-57 ^ 6. .A^ ehngatus, Blgr., 1900 " 



B. Lateral line incomplete, reduced to a few tubercles ; Sq. 50 r| ; 

 length of head 4 times in total lengtli. 



7. N. ocelUcauda, Blgr., 1907 



[(Cameroon). 



11. 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 4i to 5 times in total length ; pectoral 

 shorter than head. 



Sq. 48-49 ^|j- 8. .V. ('^/aV^Blgi-., 1902 (Congo) 



Sq. 52 ^x 9. N. dimidiatns, Pellegr., 1904 



^ [(Casamanza). 



Barhus caUipterus. 



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

 head 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 § 

 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 l3rown 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. 



