MAECUSENIUS. ' 71 



lon^^er tlian snout, IJ to IJ times in interorbltil width. Dorsal 20-22, 

 originating above 9th or 10th ray of anal, about J as long as its distance 

 from head. Anal 26-29, equally distant from base of ventral and from 

 base of caudal. Pectoral pointed, as long as head, at least twice as long 

 as ventral, reaching extremity of latter. Caudal with pointed lobes. 

 Caudal peduncle 3 times as long as deep, as long as head or a little 

 shorter. 46-56 scales in lateral line, ^^l^^ in transverse series on body, ^f^^ 

 in transverse series between dorsal and anal, 12 or 14 round caudal 

 peduncle. Brown or olive, dotted with blackish, the clots largest on the 

 head. 



Total length 80 millim. 



Lagos, Lower Congo. 





Marcusenivs ads2icrsiis. 

 Type, 



1-2. Types. West Africa. 



3. Ad. Lagos. Sir A. Moloney (P.). 



4-7. Ad. & hgr. Boma. M. P. Delliez (C). 



10. MARCUSENIUS WEEKSII. 



Bouleng. Ann. Mas. Congo, Zool. ii. p. 24, pi. vii. fig. 2 (1902). 



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

 Head as long as deep; snout rounded, nearly ^ length of head, 

 projecting beyond the mouth ; mouth small, its width ^ length of head ; 

 teeth truncate, 5 in upper jaw, 6 in lower; posterior nostril lower than 

 anterior, on a line with lower border of eye; eye moderate, as long as 

 snout, ^ interorbital width. Dorsal 28, originating above 5th ray of 

 anal, about § its distance from head. Anal 31, nearer base of ventral 

 than base of caudal. Pectoral pointed, nearly as long as head, nearly 

 twice as long as ventral, extending beyond base of latter. Caudal 

 partly scaled, with long, pointed lobes. Caudal peduncle nearly 3 times 



