MARCUSENIUS. 



63 



1. MATICUSENIUS NIGIUPINNIS. 

 Boiileno-, Ann. Mns. Oongo, Zool. i. p. 67, pi. xxxiii. fig. 1 (1899), and Poiss. Bass. 

 Congo, ]). 77 (1901). 



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

 times. Head as long as deep ; snout rather truncate, i to J 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 -| interorbital 



Fiff. 45. 



Ma rcusenius nhjripinnls. 

 Type (A. M. C). 



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

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

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

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

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



8-14 



length of head. 46—53 scales in lateral line, jq_Yq in transverse series on 

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

 purplish brown, speckled with black ; fins blackish. 



Total length 110 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 

 1-2. Two of the types. Kutu, L. Leopold II. M. P. Delliez (('.). 



2. MARCUSENIUS PULVEHULENTUS. 



Boulcng. Ann. Mns. Congo, Zool. i. p. 08, pi. xxxiii. fig. 2 (1899), and Poiss. Bass. 

 Congo, p. 78 (1901). 



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

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



