1898. ] OF TKB FAMILY MOEMTEID^. 797 



level with centre of eye ; eye moderate, f to | length of snout 

 or interorbital mdth. Dorsal 38-40, If to 1| length of anal, its 

 length equalling its distance from the head. Anal 25-27, origin- 

 ating belo\^- 12th or 13th ray of dorsal, a little nearer base of 

 ventral than base of caudal. Pectoral pointed, a little shorter than 

 head, 1| to If length of ventral, extending a little beyond base of 

 latter. Caudal scaled in its basal two-thirds, with pointed lobes. 

 Caudal peduncle 3 times as long as deep, 4 length of head. 

 61-68 scales in the lateral line, l^ff-J in a transverse lice on the 

 body, j|5i5 ill ^ transverse line between dorsal and anal, 12 round 

 caudal peduncle. Yellowish. 



Total length 260 miUim. 



Congo. 



10. MAECrSENIUS DISCOEHYNCHUS. 



Mormyrus discorhnnclms, Peters, Mon. Berl. Ac. 1852, p. 275, 

 and Eeise n. Mossamb. iv. p. 75, pi. xiv. (1868). 



Marcusenius discorhynchus, Bouleng. Ann. Mas. Congo, Zool. 

 i. 1898, p. 7. 



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

 4^ to 4|. Head as long as deep ; snout rounded, | length of 

 head ; mouth small, subinferior, its width I length of head ; teeth 

 small, notched, 5 in the upper jaw, 6 in the lower ; nostrils on a 

 line with the lower border of the eye, nearer the latter than the 

 end of the snout ; eye moderate, a little shorter than the snout, 

 I interorbital width. Dorsal 30-36, its length hardly Ig in its 

 distance from head. Aual 23-27, originating below lOtb to 12th 

 ray of dorsal, equally distant from base of ventral aud from base 

 of caudal. Pectoral pointed, nearly as long as head, 1 1 length of 

 ventral, extending to base of latter or a little beyond. Caudal 

 with obtusely pointed lobes. Caudal peduncle twice as long as 

 deep, a little shorter than head. 65-70 scales in the lateral line, 

 ^^ in a transverse line on the body, ^|^ in a transverse line 

 between dorsal and anal, 14 round caudal peduncle. Dark olive 

 or brownish ; ventrals red. 



Total length 140 millim. (grows to 260). 



Lower Zambesi ; Lake Nyassa. 



11. Maeousenius petherict. 



Mormyrus discorhynchus (non Peters), Griinth. Cat. vi. p. 220 

 (1866). 



Marcusenius peiherici, Bouleng. Ann. Mus. Congo, Zool. i. 1898, 

 p. 7. 



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

 4| to 5. Head as long as deep ; snout rounded, nearly | length 

 of head mouth small, subinferior, its width 4 length of head ; 

 teeth small, notched, 5 in the upper jaw, 6 in the lower ; nostrils 

 on a line with the lower border of the eye, nearer the latter than 



