GNATHONEMUS. 



101 



greater than that from caudal. Pectoral obtusely pointed, about f length 

 of head and extending to base of ventral, which is only about half as long. 

 Caudal nearly entirely scaled, with pointed lobes. Caudal peduncle |- to 

 -f length of head, 2 or 2^ times as long as deep. 58-64 scales in lateral 



line, ^-- in transverse series on body, — — in transverse series between 

 dorsal and anal, 10 or 12 round caudal peduncle. Uniform blackish 

 brown, lower side of head sometimes whitish. 



Total length 200 millim. 



Lake Victoria. — Type in Berlin Museum. 

 1-7. Ad. Buganga. Mr. E. De^en (C). 



6. GNATHONEMUS NIGER. 

 Mormyrus niger, Giinth. Oat. Fish. vi. p. 219 (18t!6). 



Gnathonemus niger, Bculeng. Froc. Zool. Soc. 1898, p. 802, and Fish. Nile, p. 57, 

 pi. ix. fig. 3 (1907). 



Depth of body 3-g- to 3f times in total length, length of head 4iy to 5 times. 

 Head as long as deep, with convex upper profile ; snout very short, \ to 

 -§- length of head; no mental swelling ; teeth small, notched, 5 in upper 

 jaw, 8 or 10 in lower; eye rather small, slightly shorter than the snout, 



Fig. 81. 



Gnathonemus niger. 

 White Nile (F. N.). 4. 



| to f interorbital width. Dorsal 17-20, originating above 8th to 10th 

 ray of anal, its length 2 to 1\ times in its distance from head. Anal 

 25-28, nearer base of caudal than base of ventral. Pectoral pointed, a 

 little longer than head, at least twice as long as ventral, extending 

 almost to extremity of latter. Caudal densely scaled in its basal third, 

 with obtusely pointed lobes. Caudal peduncle about twice as long as 



