MAECUSENIUS. 



85 



24. MARCUSENIUS PSITTACUS. 

 Mormp-us psittacus, Bouleng. Ann. & Mag. N. H. (6) xx. 1897, p. 427. 

 Marcusenius psittacus, Bouleng. Proc. Zool. Soc. 1898, p. 798, and Poiss. Bass. 

 Congo, p. 81 (1901). 



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

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

 mouth small, terminal or subinferior, its width 3- or ^ length of head ; 

 teeth small, notched, 5-7 in upper jaw, 6-8 in lower; chin slightly 

 swollen ; nostrils on a line with or a little below centre of eye, nearer 

 latter than end of snout ; eye rather large, not or but slightly longer 

 than snout, equal to or a little less than interorbital width. Dorsal 



Fig. 68. 



.4 



\. 



Marcusenius psittacus. 

 Type. 



33-41, as long as its distance from head. Anal 23-27, originating 

 below 10th to 13th ray of dorsal, equally distant from base of ventral 

 and from base caudal. Pectoral pointed, as long as or a little shorter 

 than head, 1\ to If times as long as ventral, reaching base of latter or 

 beyond. Caudal with long, pointed lobes. Caudal peduncle 3 times as 

 long as deep, as long as head or a little shorter. 58-69 scales in lateral 

 line, J^ in transverse series on body, j|^ in transverse series between 

 dorsal and anal, 12 round caudal peduncle. Silvery, dark grey on the 

 back. 



Total length 210 millim. 



Congo. 



