MAECUSENIUS. 63 



1. MARCUSENIUS NIGRIPINNIS. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 67, pl.xxxiii. fig. 1 (1899), and Poiss. Bass. 

 Congo, p. 77 (1901). 



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

 times. Head as long as deep ; snout rather truncate, y to \ length of 

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

 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 eye ; 

 eye rather large, its diameter equal to length of snout and f interorbital 



S*S?x 



rig. 45. 



"~t77 s ? a TO£©SRHssm 



'gR&s&'^r^ta' 



■mm^ 





;«> 



IsiBPP 





Ma rcusenius nitjripinnis. 

 Type (A. M. C). 



width. Dorsal 20-22, originating above 6th or 7th ray of anal, its length 

 J its distance from head. Anal 26-27, a little nearer root of caudal 

 than root of ventral. Pectoral pointed, as long as head, 2^ to 2f times 

 as long as ventral, extending beyond base of latter. Caudal with long 

 pointed lobes. Caudal peduncle 3 to 3^ times as long as deep, § to f 

 length of head. 46—53 scales in lateral line, j^g in transverse series on 

 body, n between dorsal and anal, 12 round caudal peduncle. Dark 

 purplish brown, speckled with black ; fins blackish. 



Total length 310 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 

 1-2. Two of the types. Kutn, L. Leopold II. M. P. Delhez (C). 



2. MARCUSENIOS PULVERULENTUS. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 68, pi. xxxiii. fig. 2 (1899), and Poiss. Bass. 

 Congo, p. 78 (1901). 



Depth of body 3 to %\ times in total length, length of head 3f to 4 

 times. Plead a little deeper than long; snout rounded, \ to \ length of 



