1898.] OF THE FAMILY MOEMYRID^. 793 



Mormyrus marchei, Sauvage, N. Arch. Mus. (2) Hi. 1880, p. 50, 

 pi. ii. fig. 6 ; Giinth. Ann. & Mag. K H. (6) xvii. 1896, p. 287. 



Marcusenius marchii, Bouleug. Ann. Mus. Congo, Zool. i. 

 1898, p. 7. 



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

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

 of head, projecting a little beyond the mouth ; latter small, inferior, 

 its width i length of head : teeth ti'uncate or feebly notched, 5 in 

 the upper jaw, 6 in the lower ; nostrils halfway between end of 

 snout and eye ; eye moderate, g length of snout, a little more 

 than I interorbital width. Dorsal 22-24, originating above 10th 

 ray of anal, its length 2| in its distance from head. Anal 30-31, 

 Ij as long as dorsal, nearer base of ventral than base of caudal. 

 Pectoral pointed, as long as head, twice as long as ventral, ex- 

 tending beyond base of latter. Caudal with pointed lobes. Caudal 

 peduncle 4 to 5 times as long as deep, a little longer than head. 

 62 scales in the lateral line, --^ in a transverse line on the body, 

 g- in a transverse line between dorsal and anal, 12 round caudal 



peduncle. Olive-brown above, silvery beneath ; head speckled 

 with brown. 



Total length 160 millim. 



Ogowe. 



2. Maecttsejtius sphecodes. 



Mormyrops spliehodes, Sauvage, Bull. Hoc. Philom. (7) iii. 1878, 

 p. 101, and N. Arch. Mus. (2) iii. 1880, p. 55, pi. ii. fig. 4. 



Mormynis sphecodes, Giinth. Ann. & Mag. N. H. (6) xvii. 1896 

 p. 280. 



Marcmenius sphecodes, Bouleng. Ann. Mus. Congo, Zool. i 

 1898, p. 7. 



Depth of body equal to length of head, 5 times in total length. 

 Head 11 as long as deep ; snout rounded, \ length of head ; 

 mouth small, subiuferior, 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, midway between eye and end 

 of snout; eye small, | length of snout, ^ interorbital width. 

 Dorsal 20, originating above 5th ray of anal, not i as long as its 

 distance from the head. Anal 25-26, equally distant from base 

 of ventral and from base of caudal. Pectoral pointed, | length 

 of head, 1^ length of ventral, reaching base of latter. Caudal 

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

 nearly as long as head. 67 scales in the lateral line, ^ in a 



' Id 



transverse line on the body, g in a transverse line between dorsal 



and anal, 12 round caudal peduncle. Brown. 

 Total length 130 millim. 

 Ogowe. 



3. Maucusenitts beachthistius. 



Marcusenius hrachyistius, Gill, Proc. Ac. Philad. 1862, p. 139. 

 Mormyrus hrachyistius, Griinth. Cat. vi. p. 219 (1866). 

 Pboc. Zool. Soc— 1898, No. LIIL 63 



