60 MOKMYKID.E. 



•3- length of head. Caudal small, with obtusely pointed lobes. Caudal 

 peduncle twice as long as deep, -^ length of head. 120-140 scales in 

 lateral line, g between dorsal and anal, 1S-20 round caudal peduncle. 

 Dark brown. 



Fig. 4-t. 



IsicWiys liearyi. 

 S. Cameroon, g. 



Total length 205 millim. 



West Africa, from Liberia to Mayumba, French Congo. — Type in 

 U.S. National Museum, Washington. 



1. Ad. Sapelle, Lower Niger. Dr. W. J. Ansorge (C). 



2-4. Ad. Kribi R., S. Cameroon. G. L. Bates, Esq. ((J.). 



5-6. Ad. Eloby, Gaboon. 



7, 8. Ad. & hgr. Gaboon. 

 9. Skel. 



10. Ad. Masoma R., Ogowe. Dr. W. J. Agsdrge (G). 



11. Hgr. W. Africa. 



4. MARCUSENIUS. 

 Petroceplialm, part., Marcusen, Bull. Ac. St. Petersb. xii. 1854, p. 14, and Mem. 



Ac. St, Petersb. (7) vii. 1864, no. 4, p. 113. 

 Marcusenius, Gill, Proc. Ac. Pbilad. 1862, p. 129 ; Bouleng. Proc. Zool. Soc. 



1898, p. 792, Poiss. Bass. Congo, p. 74 (1901), and Fish. Nile, p. 40 (1907). 

 Heteromormyrus, Steind. Verh. zool.-bot. Ges. Wien, xvi. 1866, p. 765. 

 Mormyrus, part., Giiuth. Cat. Fish. vi. p. 214 (1866). 

 Eippopotamyrus, Pappenh. Sitzb. Ges. naturf. Fr. Berl. 1906, p. 260, and Mitth. 



Zool. Mus. Berl. iii. 1907, p. 350. 



Teeth in the jaws rather large or small, truncate or notched (3-9 

 upper and 6-10 lower) ; minute conical teeth on the parasphenoid and 

 on the tongue ; mouth inferior or subinferior, below the level of the eyes. 

 Nostrils widely separated. Body short or more or less elongate ; ventral 

 fins midway between pectorals and anal, or nearer the former. Dorsal 

 and anal fins subequal in length, or either the longer. Vertebra; 37- 

 4S (9-16 + 4-6 + 23-30). 



Nile and Tropical Africa. 



