MARCUSENIUS. 79 



Brown above, white below; dorsal aad anal fins blackish, white at the 

 base ; a blackish streak along each lobe of the caudal fin. 



Total length 305 millim. 



White Nile ; Togoland (West Africa). 



1. Type. Polkoin, Baro R. (Sobat). Mr. P. C. Zaphiro (0.) ; 



W. N. McMillan, Esq. (P.). 



18. MARCUSENIUS TUMIFRONS. 

 Bouleng. Ann. Mus. Congo, Zool. ii. p. 24, pi. vii. fig. 3 (1902). 



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

 Head as long as deep ; snout rounded, f- length of head, strongly 

 projecting beyond mouth, which is inferior, below vertical of eye, and 

 the width of which is ^ length of head ; teeth notched, bicuspid, 9 in 

 upper jaw, 10 in lower ; both nostrils on a line with lower border of eye, 

 which is close to the posterior ; eye rather small, shorter than snout, 



Fig. 62. 



Marcusenius tumifrons. 

 Type (A. M. C). f 



i interorbital width. Dorsal 29, | its distance from head. Anal 28, 

 originating a little further back than dorsal. Pectoral pointed, as long 

 as head, twice as long as ventral, extending considerably beyond base of 

 latter. Caudal with long, pointed lobes. Caudal peduncle 3^ times 

 as long as deep, a little shorter than head. 60 scales in lateral line, 

 ^ in transverse series on body, || in transverse series between dorsal and 

 anal, 16 round caudal peduncle. Uniform brown. 



Total length 100 millim. 



Ubanghi.— Type in Congo Museum, Tervueren. 



