MAECUSENIUS. 45 



15 • 



half times as long as deep, as long as the head. 87 scales in the lateral line, ^rna 



transverse series on the body, ^ in a transverse series between dorsal and anal fin, 



12 round caudal peduncle. 



Brown above, white below (in spirit) ; dorsal and anal fins blackish, white at the 

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



Measurements (in millimetres). 



Total length 305 



jy „ (without caudal fin) 290 



Greatest depth of body 75 



Length of head 55 



Width of head 31 



Length of snout 16 



Diameter of eye 9 



Interocular width 19 



Width of mouth 13 



Length of caudal peduncle 54 



Depth of caudal peduncle 16 



Length of pectoral fin 51 



„ ventral fin 27 



A single specimen (male), from Polkom, Baro River (Sobat), obtained in April 1904 

 by Mr. P. C. Zaphiro, and presented to the British Museum by Mr. W. N. McMillan. 



This species is named in honour of Sir John L. Harrington, H.M. Minister- 

 Plenipotentiary to the Emperor of Abyssinia, who has been active in organising 

 various zoological expeditions in North-eastern Africa. 



4. MARCUSENIUS PETHERICI. 

 (Plate VIII. fig. 3.) 



Mormyrus discorhynchus (non Peters), Giinther, Cat. Fish. vi. p. 220 (1866), and Petherick's Trav. 



ii. p. 255 (1869). 

 Marcusenius petherici, Boulenger, Ann. Mus. Congo, Zool. i. p. 7 (1898), and Proc. ZooL Soc. 1898, 



p. 797. 



Body strongly compressed, its depth twice and two-thirds to three and one-fourth times 

 in the total length ; length of head four and two-thirds to five times in the total length. 

 Head as long as deep or a little deeper than long, once and two-thirds to once and 

 four-fifths as long as broad; snout one-fifth to one-fourth the length of the head, 

 rounded, projecting beyond the mouth ; mouth situated below the nostrils, its width 



