1G0 ADDENDA, VOL. I. 



darker on the back, spotted and marbled with dark brown ; fins 

 brown. 



Total length 70 millim. 



Lake Ngami Basin, Bechuanaland. 



1-2. Types. Okovango R. R. B. Woosnam, Esq. ((.'.). 



Distinguished from M. Ihuysii by the lower number of dorsal and 

 anal fin-rays. 



8 6. MARCUSENIUS BREVIS. 

 Bouleng. Rev. Zool. Afr. ii. 1013, p. 150. 



Depth of body 2f- to 3 times in total length, length of head 3J to 3f 

 times. Head as long as deep ; snout rounded, i length of head, pro- 

 jecting a little beyond mouth ; mouth small, well below level of lower 

 border of eye; teeth moderate, notched, 7 in upper jaw, 8 in lower; 

 eye as long as snout, its diameter not quite \ interocular width ; 

 posterior nostril a little lower down than upper, close to eye. Dorsal 

 19, originating above 4th or 5th ray of anal, its length J its distance 

 from head. Anal 24-26, nearer caudal than base of ventral. Pectoral 

 a little shorter than head, not reaching extremity of ventral. Caudal 

 with pointed lobes. Caudal peduncle twice as long as deep, |- length 

 of head. 42-44 scales in lateral line, jg^jj in transverse series on body, 



o 



ij in transverse series between dorsal and anal, 12 round caudal 

 peduncle. Brownish, head darker, with dark dots and irregular spots. 



Total length 60 millim. 



Uelle, Upper Congo. — Type in Congo Museum, Tervueren. 

 1. One of the types. Dungu, Upper Uelle. Capfc. Hutereau (C). 



Distinguished from M. Ihuysii by the lower number of scales in the 

 lateral line. 



9a. MARCUSENIUS HUTEREADI. 

 Bouleng. Rev. Zool. Afr. ii. 1913, p. 155. 



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

 as long as deep ; snout very short, rounded, strongly projecting beyond 

 the mouth, which is situated below the eye; width of mouth 3| times in 

 length of head ; teeth very small, bicuspid, 7 in upper jaw, 8 in lower ; 

 nostrils on a line with centre of eye, posterior nearly touching eye, which 

 is longer than snout, 4-| times in length of head, and 1^ times in inter- 

 ocular width. Dorsal ID, originating above 10th ray of anal, its base 



