54 



MOKMTRID,^. 



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

 the base. 38-45 scales in lateral line, j'y_i2 ^^ transverse series on body, 



11-13 



JJ-J2 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. Duqueah R., Liberia. 

 Afjberi, S. Nigeria. 

 Kribi R., S. Cameroon. 

 Ja R. at Bitye, Cameroon. 

 Talagoiiga, Ogowe. 

 Ibali, Lake T-eopold II., Upper Congo 

 Upj)er Congo. 

 Banzyville, Ul)anohi. 

 Qnanza R., Angola. 



3. Hgr. 

 4-5. Ad. 



6-10. Ad.&bgr. 

 11-13. Ad. 



14. Hgr. 



15. Ad. 

 Ifi. Ad. 



17-18. Hgr.&yg. 



Dr. Buttikofer (C). 

 Dr.W.J. Ansorge(C.). 

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



Miss Kinojsley (C). 

 M. P. Delbez (C). 

 Brussels University. 

 Capt. Royaux (C). 

 Dr. W. J. Ansorge (C). 



6. PETROCEPHALUS BOVEI. 



Mormyrns hovei, Cuv. & Val. Hist. Poiss. xix. p. 283 (1846) ; Giiuth. Petberick's 

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



Fetrocephahis hocei, Marcusen, Bull. Ac. St. Petersb. xii. 1854, p. 14 ; Boulcng. 

 Proc. Zool. Soc. 1808, p. 789, and Fish. Nile, p. 36, i>l. 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, y to y length of 

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

 f to J length of head ; teeth bicuspid, 10-14 in upper jaw, lG-20 in 



Fijr. ;39. 



Petrocephahcs hovei. 

 Lower Nile (E. N.). 



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

 than snout, its diameter 3J to 4 J times in length of head, IJ to 1| times 

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

 of anal, its length 1| to 2 times in its distance from head and a little 



