1898.] OP THE PAMILT MORMTRIDJE. 795 



5. Maecusenius ADSPEESTTS. 



Mormyrus adspersus, Griinth. Cat. vi. p. 221 (1866). 



Marcusenius adspersus, Bouleng. Ann. Mus. Congo, Zool. i. 

 1898, p. 7. 



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

 Head as long as deep ; snout rounded, i length of head ; mouth 

 small, subinferior, its width 4- length of head ; teeth small, notched, 

 7 in the upper jaw, 8 in the lower ; nostrils on a line with centre 

 of eye, posterior close to eye ; eye moderate, as long as snout, 

 I interorbital width. Dorsal 20-21, originating above 9th or 10th 

 ray of anal, about J as long as its distance from head. Anal 

 27-28, equally distant from base of ventral and from base of 

 caudal. Pectoral as long as head, twice as long as ventral, reaching 

 nearly to extremity of latter. Caudal with obtusely pointed lobes. 

 Caudal peduncle 3 times as long as deep, nearly as long as head. 

 46-50 scales in the lateral Hne, ^ in a transverse line on the 

 body, ^ in a transverse line between dorsal and anal, 12 round 

 caudal peduncle. Brown, dotted with blackish, the dots largest 

 on the head. 



Total length 80 millim. 



Lagos. 



6. MAEOUSBWrUS lhtjtsii. 



Mormyrus Ihuysii, Steind. Sitzb. Ak. Wien, Ixi. i. 1870, p. 553, 

 pi. ii. fig. 3. 



Marcusenius Ihuysli, Bouleng. Ann. Mus. Congo, Zool. i. 

 1898, p. 7. 



Depth of body 31 times in total length, length of head 4^. 

 Head a little longer than deep ; snout rounded, not quite \ length 

 of head ; mouth small, terminal, but situated below the level of 

 the eyes ; no mental swelling ; teeth small, truncate, 5 in the 

 upper jaw, 6 in the lower ; eye as long as the snout ; posterior 

 nostril a little lower down than upper, close to the eye. Dorsal 20, 

 originating above 8th ray of anal, its length 21 in its distance 

 from head. Anal 28, nearer base of caudal than base of ventral. 

 Pectoral pointed, not quite so long as head, twice as long as 

 ventral, extending as far as the extremity of the latter. Caudal 

 with rounded lobes. Caudal peduncle twice as long as deep, about 

 I length of head. 48 scales in the lateral line, 12 round caudal 

 peduncle. Greyish above, silvery beneath, spotted with brown. 



Total length 75 millim. 



Senegal. — Type in the Vienna Museum. 



7. Maecusenitjs paucieadiatus. 



Mormyrus paudradiatus, Steind. Verb, zool.-bot. Gres. Wien, 

 xvi. 1866, p. 765, pi. xvii. fig. 2. 



Marmsenius paudradiatus, Bouleng. Ann. Mus. Congo, Zool. i. 

 1898, p. 7. 



Depth of body equal to length of head, 4 times in total length, 



53* 



