816 ME. G. A. BOULENGEE ON THE FISHES [XoV. 15, 



Scrophicephalus longipinnis. Swains. Nat. Hist. Fish. i. p. 309 

 (1838). 



Depth of body 4 to ok times iu total length, length of head 

 4 to 4|. Upper profile of head descending in a straight line or 

 feeble curve ; snout produced, about as long as the postocular 

 part of the head, its length 2 to 4 times its least depth ; mouth 

 very small, with thick lips ; teeth small, notched, 5 or 7 in the 

 upper jaw, 8 or 10 in the lower; eye moderate, its diameter 

 about twice iu interorbital width. Dorsal 80-87, originating in 

 advance of base of ventral, 5g to 6| times as long as anal, I5 to 

 If as long as its distance from the end of the snout. Anal 18-20, 

 originating at equal distance from the base of the pectoral and 

 that of the caudal. Pectoral obtusely pointed, | length of head, 

 ventral |. Caudal with pointed lobes, densely scaled. Caudal 

 peduncle 1| to twice as long as deep, | length of head. 100-130 



scales in the lateral line, g^ in a transverse line on the body, 

 38-45 in a transverse line between dorsal and anal, 26 to 30 round 

 caudal peduncle. Olive above, whitish below. 



Total length 520 millim. 



Nile, Gaboon, Congo. 



Moi'myrus nacra, Cuv. & Val. xix. p. 257, is founded on a 

 coloured sketch of a fish apparently closely related to 31. caschive. 



7. MOBMYEUS KILOXICUS. 



Centnscus niloticm, Bloch, Schneid. Syst. p. 113, pi. xxx. fig. 1 

 (1801). 



Mormyrus yeoffroyi, Cuv. & Val. xix. p. 240 (1846). 



Mormyrus niloticm, Bouleng. Ann. Mas. Congo, Zool. i. 1898, 

 p. 15. 



Depth of body less than length of head, 4| times in total length. 

 Snout long, straight, prolonged in the axis of the body, with 

 slightly concave upper profile ; lower jaw slightly projecting. 

 Dorsal 84. Anal 17. Otherwise similar to 3f. caschive, but 

 scales a little smaller. 



Total length 300 millim. 



Nile. — Known to me only from Valenciennes's description, and 

 Schneider's very imperfect figure. 



8. MoEMTETTi JUBELINI. 



Mormyrus jubelini, Cuv. & Yal. xix. p. 252 (1846). 



General shape and proportions as in M. cascJdve, but caudal 

 peduncle more slender, and fewer scales round the latter. D. 85 • 

 A. 19. 



Senegal. — Imperfectly known from Valenciennes's description. 



9. MOEMYEUS EtTME. 



Mormyrus rume, Cuv. & Val. xix. p. 248, pi. ccccclxix. (1846). 

 Depth of body 3| times in total length, length of head 4. 

 Upper profile of head descending in a straight line ; snout pro- 



