54 



MORMYRID.E. 



3 times as long as deep, f to f length of head, more or less constricted at 

 the base. 38-45 scales in lateral line, fy^ in transverse series on body, 



11-13 



n _ 12 in transverse series between dorsal and anal, 12 round caudal 

 peduncle. Brown above, silvery beneath ; anterior part of dorsal 

 blackish ; a brown spot sometimes present below origin of dorsal. 



Total length 120 millim. 



Liberia to Congo. — Type in Paris Museum. 



1-2. Hgr. & yg. Duqneab R., Liberia. 

 3. Hgr. Agberi, S. Nigeria. 



4-5. Ad. Kribi R., S. Cameroon. 



6-10. Ad. & bgr. Ja R. at Bitye, Cameroon. 

 11-13. Ad. Talagouga, Ogowe. 



Ibali, Lake Leopold II, Upper Congo. M. P. Delbez (C). 



Upper Congo. Brussels University. 



Dr. Buttil<oEer (C). 



Dr.W.J. Ansorge(C). 

 G. L. Bates, Esq. (C). 



Miss Kino-sley (C). 



14. Hgr 



15. Ad. 



16. Ad. Banzyville, Ubanghi. 



17-18. Hgr. &yg. Quanza R., Angola. 



Capt. Royaux (C). 

 Dr. W. J. Ansorge (C). 



6. PETROCEPHALUS BOVEI. 

 Mormymts bovei, Cuv. & Val. Hi.-t. Poiss. xix. p. 283 (1846) ; Giinth. Petherick's 



Trav. ii. p. 255 (1869) ; Steind. Sitzb. Ak. Wien, lxi. i. 1870, p. 553. 

 Petrocepliulus bovei, Marcusen, Bull. Ac. St. Petersb. xii. 1854, p. 14 ; Bouleng. 



Proc. Zool. Soc. 1898, p. 789, and Fish. Nile, p. 36, pi. viii. fig. 1 (1907). 



Depth of body 3 to 3J times in total length, length of head 4 to 4J 

 times. Head as long as deep; snout very short, \ to j length of 

 head, rounded, projecting beyond mouth ; mouth below eye, its width 

 §- to -| length of head ; teeth bicuspid, 10-14 in upper jaw, 10-20 in 



Fig. 39. 



plIP^" 



Petrocepliulus bovei. 

 Lower Nile (F. N.). 



lower; nostrils on a level with lower border of eye; eye large, longer 

 than snout, its diameter 3 \ to i\ times in length of head, \\ to If times 

 in interorbital width. Dorsal 22-26, originating above 6th to 8th ray 

 of anal, its length \\ to 2 times in its distance from head and a little 



