MARCUSENIUS. 



81 



20. MARCUSENIUS DISCORHYNCHUS. 

 Mormyrxis discorhi/nchus, Peters, Mon. Berl. Ac. 1852, p. 275, and Reise Mossamb. 



iv. p. 75, pi. xiv. (1868). 

 Marcusenius discorJit/nchus, Bouleng. Proc. Zool. Soc. 1898, p. 7, and Poiss. Bass. 



Congo, p. 82 (1901) ; Pappenh. Mittli. Zool. Mus. Berl. iii. 1907, p. 349. 

 Marcusenius tanganicanus, Bouleng. Tr. Zool. Soc. xvii. 190G, p. 545, pi. xxx. fig. 1. 



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

 times. Head as long as deep ; snout rounded, f length of head ; mouth 

 small, subinferior, its width i to ^ length of head ; teeth small, notched, 

 5 in upper jaw, 6 in lower ; nostrils on a line with lower border 

 of eye, nearer latter than end of snout ; eye moderate, as long as or a 

 little shorter than snout, f interorbital width. Dorsal 30-36, its length 



Yvz. 64. 



Marcusenius dlscorliijncli us. 

 Type, after Peters (Eeise Mossamb.). |. 



1\ to 1\ times in its distance from head. Anal 23-27, originating 

 below 8th to 12th ray of dorsal, equally distant from base of ventral 

 and from base of caudal. Pectoral pointed, nearly as long as head, 

 1^ times length of ventral, extending to base of latter or a little beyond. 

 Caudal with obtusely pointed lobes. Caudal peduncle 2 to 2\ times as 

 long as deep, a little shorter than head. G5-T0 scales in lateral line, 

 c,-^^ in transverse series on body, -^^^ in transverse series between 

 dorsal and anal, 12 or 14 round caudal peduncle. Dark olive or 

 brownish above, silvery white beneath. 



Total length 160 millim. (grows to 260). 



Lower Zambesi ; Lake Nyassa ; Katanga ; Lake Tanganyika. — Types 

 in Berlin Museum. 



VOL. I. ^ 



