70 MOEMTEID^. 



8. MARCUSESIUS LHUYSII. 

 Mormyrus Ihuysn, Steind. Sitzb. Ak. Wien, Ixi. i. 1870, p. 553, pi. ii. fig. 3. 

 Marcuseniut Ihuysii, Bouleng. Proc. Zoo). Soc. 1898, p. 795. 



Depth of body 2| to 3J times in total length, length of head 4^ times. 

 Head as long as deep; snout rounded, not quite | length of head, 

 projecting slightly beyond month ; mouth small, terminal, but situated 

 below level of eyes ; teeth small, notched, 5 or 7 in upper jaw, 6 in 

 lower; eye as long as snout, \ interocular width; posterior nostril a 

 little lower down than upper, close to eye. Dorsal 18-20, originating 

 above fith to Sth ray of anal, its length 2^ times in its distance from 



Pis. 52. 



Marcusenius Ihuysii. 

 Type, after Steindachner {I. c). ^. 



head. Anal 25-28, nearer base of caudal than base of ventral. Pectoral 

 pointed, as long as head, twice as long as ventral, extending as far as 

 extremity of latter. Caudal with pointed lobes. Caudal peduncle 2 to 

 2^ times as long as deepj f to f length of head. 48-50 scales in lateral 

 line, 12 round caudal peduncle. Greyish above, silvery beneath, uniform 

 or spotted with brown. 



Total length 60 millim. 



Senegal, Shari River. — Type in the Vienna Museum. 

 1. Ad. Kaedi, Senegal. M. P. Delhez (C). 



9. MARCUSENIUS ADSPERSUS. 

 Mormyrus adspersus, Giinth. (Jat. Fish. vi. p. 221 (186(3). 



Marcitsenius adspersvs, Bouleng. Proc. Zoo). Soc. 1898, p. 795, and Poiss. Bass. 

 Congo, p. 76 (1901). 



Depth of body 2| to 3J times in total length, length of head 4 to 4^ 

 times. Head as long as deep ; snout rounded, ^ to | length of head : 

 mouth small, subinferior, its width \ length of bead ; teeth small, 

 notched, 5 or 7 in upper jaw, 8 in lower ; nostrils on a line with centre 

 of eye, posterior close to eye ; eye moderate, as long as or a little 



