64 MOEMTEID.fi. 



head, projecting very slightly beyond mouth ; latter small, its width 4 to 

 4| times in length of head; teeth truncate or feebly notched, 9 in upper 

 jaw, 10 in lower ; anterior nostril halfway between end of snout and eye, 

 on a line with centre of latter, posterior lower down and close to the 

 eye ; eye large, 4 to 4| times in length of head, 1} to 1^ times in inter- 

 orbital width. Dorsal 23-25, originating above 5th to 7th ray of anal, 

 its length about ^ its distance from head. Anal 28-29, equally distant 

 from root of ventral and from root of caudal, or a little nearer latter. 



rig. 46. 



"- 1 



if 



Marcusenius pidverulentus. 

 Tjpe(A.. M. C). |. 



Pectoral pointed, as long as or a little longer than head, twice as long as 

 ventral, the extremity of which it reaches. Caudal with long pointed lobes. 

 Caudal peduncle 3 to 3J times as long as deep, f to f length of head. 

 50 scales in lateral line, ^ in transverse series on body, ^^ between 

 dorsal and anal, 12 round caudal peduncle. Olive-brown, speckled with 

 black; fins blackish. 



Total length 100 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 

 1-2. Two of the types. Coquilhatville. M. P. Delhez (C). 



3. Ad. Lindi R. M. M. Storms (C). 



3. MARCUSENIUS MARCHII. 

 Petrocephalus marchei, Sauv. Bull. Soc. Pliilom. (7) iii. 1878, p. 100. 

 Mormyrus marchei, Sauv. K Arch. Mus. (2) iii. 1880, p. 50, pi. ii. fig. 5 ; Guiith. 



Ann. & Mag. N. H. (6) xvii. 1896, p. 287. 

 Marcusenius marcltil, Eouleng. Proc. Zool. Soc. 1898, p. 792. 



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

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



