GNATHONEMUS. x 103 



as long as ventral, extending beyond base of latter. Caudal scaled in its 

 basal half, with long, pointed lobes. Caudal peduncle twice as long as 

 deep, I to f length of head. 55-60 scales in lateral line, ^-^^^^ in trans- 

 verse series on body, g^ in transverse series between dorsal and anal, 

 12 round caudal peduncle. Uniform blackish. 



Total length 270 millim. 



Lake Leopold IL, Congo. — Types in Congo Museum, Tcrvueren. 

 1. One of the types. Ibali. M. P. Delhez (C). 



8. GNATHONEMUS FRITELI. 

 Pellegr. Bull. Mus. Paris, 1904, p. 440. 



Depth of body equal to length of head, 5| times in total length. 

 Head longer than deep ; snout a little more than ^ length of head ; 

 teeth strongly notched, 4 in upper jaw, 5 in lower ; chin with a globular 

 swelling ; eye half length of snout, J interorbital width. Dorsal 19, 

 originating above 12th ray of anal, its length nearly J its distance from 

 head. Anal 31. Pectoral rounded, | length of head, not reaching base 

 of ventral. Caudal scaled at the base, with rounded lobes. Caudal 

 peduncle 2^ times as long as deep. 65 scales in lateral line, y-^ in trans- 

 verse series on body, ^ in transverse series between dorsal and anal, 12 

 round caudal peduncle. Uniform brownish. 



Total length 135 millim. 



x^lima K., Congo. — Type in Paris Museum. 



9. GNATHONEMUS BENTLEYL 

 Mormyrus hm(lei/i, Bonleng. Ann. & Mag. N. H. (6) xx. 1897, p. 426. 

 Gnathonemus bentle7/i, Bou'.eng. Proc. Zool. Soc. 1898, p. 804, and Poiss. Bass. 

 Congo, p. 92 (1901). 

 Depth of body equal to length of head, 5 times in total length. Head 

 once and ^ as long as deep, upper profile slightly concave above the eye ; 

 snout \ length of head ; teeth notched, 7 in upper jaw, 10 in lower : 

 chin strongly swollen ; eye moderate, 4 length of snout, f interorbital 

 width. Dorsal 23, originating above 5th ray of anal, its length twice in 

 its distance from head. Anal 34, nearer base of caudal than base of 

 ventral. Pectoral pointed, almost as long as head, nearly twice as long 

 as ventral, extending beyond base of latter. Caudal densely scaled, with 

 pointed lobes. Caudal peduncle 3 times as long as deep, almost as long 



