MARCUSENIUS. 



85 



24. MARCUSEN1U8 PSITTACUS. 

 Hforiui/rua ps'dtaciif!, Boulcng. Ann. & Mag-. N. IT. (G) xx. 1897, p. 427. 

 Marcuseidas pslltacus, Bouleno-. Proc. Zool. Soc. 1(598, p. 798, and Poiss. Bass. 

 Congo, p. 81 (1901). 

 Depth of body 3 to 3^ times in total length, length of head 4^ to 5J 

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

 mouth small, terminal or subinferior, its width y or J length of head ; 

 teeth small, notched, 5-7 in upper jaw, G-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 



rig. 68. 





3Iai'ci(seni}(s psitiacus. 

 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, ]^^, 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. 



