802 MR. G. A. BOULBNGER ON THE FISHES [NoV. 15, 



B. Dorsal originating a little in advance of 

 anal. 

 D. 28 ; A. 30 ; cliin with a globular swelling ; lat. 



1.55; 12 scales round caudal peduncle 13. tissheri Gthr. 



D. 35 ; A. 31 ; chin with a short dennal appendage ; 



lat. 1, SO ; 8 scales round caudal peduncle 14. gresJwffi Schilth. 



II. Snout mucli longer than postocular part of 

 head, tubiform ; lower jaw with a dermal 

 appendage. 



A. 12 scales round caudal peduncle. 



D. 26-30; A. 30-33; length of snout 4-5 times 



its least depth ; mental appendage about as long 



as the eye 15. tamandua Gihr . 



D. 34 ; A. 35 ; length of snout 3 times its least 



depth; mental appendage | length of snout 16. mirus Blgr. 



D. 33 ; A. 34-36 ; snout directed downwards at 



right angles to the outline of the pectoral region, 



its length 3-4 times its least dejjth ; mental 



appendage not longer than eye 17. elephas Blgr. 



B. 16-18 scales round caudal peduncle ; 



mental appendage short. 

 D. 28-31 ; A. 31-35 ; snout strongly curved, its 



length 5^7 times its least depth 18. rhynchophoms Blgr. 



D. 32 ; A. 36 ; snout strongly curved, its length 



12 times its least depth 19. curvirostris Blgr. 



D. 32 ; A. 36 ; snout feebly curved, its length 20 



times its least depth 20. immcnkis Blgr. 



1. GkATHONEMUS NIGEli. 



Mormyrus niger, Giinth. Cat. vi. p. 219 (186G), 



Gnathonemus niger, Bouleng. Ann. Mus. Congo, Zool. i. 1898, 

 p. 10. 



Depth of body 3| to 3| times in total length, length of head 5. 

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

 short, i length of head : mouth on a level with the lower 

 boi'der of the eye ; no mental swelling ; teeth small, notched, 5 in 

 the upper jaw, 8 in the lower ; eye rather small, slightly shorter 

 than the snout, | to 'i interorbital width. Dorsal 18-20, 

 originating above 9th or 10th ray of anal, its length 2 to 2g times 

 in its distance from head. Anal 26-28, nearer base of caudal 

 than base of ventral. Pectoral 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 twice as long as deep, | to 4- 

 length of head. 51-56 scales in the lateral line, jj^^g in a trans- 

 verse line on the body, ^^ in a transverse line between dorsal and 

 anal, 12 round caudal peduncle. Blackish brown. 



Total length 115 milhm. 



Gambia. 



2. Gnathonemus longibabbis. 



Mormyrus longiharhis, Hilgend. Sitzb. Ges. nat. Fr. Berl. 1888, 

 p. 78. 



