DISTICHODUS. 



267 



snout not compressed, projecting a little beyond mouth, If to If times 

 as long as eye, which is 3£ (young) to h\ times in length of head ; inter- 

 orbital width \\ to H times length of snout, about \ length of head ; 

 maxillary not extending quite to below nostrils ; teeth in two series in 

 each jaw, outer series containing 16 (young) to 26 teeth. Dorsal 22-2-) 

 (4-6 unbranched), equally distant from head and from caudal, or a little 

 nearer latter. Adipose fin moderately large, separated from dorsal by a 

 space equal to f to \ base of latter. Anal 13-15 (3-4 unbranched), its 

 base much shorter than that of dorsal. Pectoral £ to | length of head, 

 as long as ventral or a little longer. Caudal forked, lobes rounded. 

 Caudal peduncle much longer than deep. Scales 60-66 j^zja' 9~10 

 between lateral line and root of ventral. Brown or olive above, whitish 

 beneath ; 10 to 14 more or less distinct dark vertical bars, disappearing 

 with age ; dorsal with numerous black dots. 

 Total length 550 millim. 



Capt. Wilverfch (C). 

 M. A. Greshoff (C.) ; 



Utrecht University (E.). 

 M. P. Delhez (C). 

 Rev. J. H. Weeks (P.). 

 Capt. Wilverth (C). 

 Brussels University. 



9. DISTICHODUS ATROVENTRALIS. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 28, pi. xiii. fig. 2 (1898), and Poiss. Bass. 

 Congo, p. 192 (1901). 



Depth of body 2^ to 2f times in total length, length of head 3§ to 4f 

 times. Head as long as deep or a little longer, about twice as long as 

 broad ; snout not compressed, projecting strongly beyond mouth, as long 

 as eye in the young, twice as long in the adult; eye 3^- (young) to 

 5 times in length of head; interorbital width 1 to \\ times length of 

 snout, f- length of head ; maxillary extending to below nostrils or not 

 quite so far ; teeth in two series in each jaw, outer series containing 20 

 (young) to 36 teeth. Dorsal 22-24 (4-5 unbranched), equally distant 

 irom head and from caudal. Adipose fin small, separated from dorsal 

 by a space equal to \ to § base of latter. Anal 13-15 (3-4 unbranched), 

 its base much shorter than that of dorsal. Pectoral f to f length of 

 head. Caudal forked, with rounded or obtusely pointed lobes. Caudal 



Congo. 





1. Ad. 



Cataracts of Manyanga. 



2. Yg., type. 



Kinshassa, Stanley Pool. 



3-4. Yg. 



Kutu, L. Leopold II. 



5, 6. Ad. k yg. 



Monsembe, Upper Congo 



7. Ad. 



New Antwerp, „ 



8-10. Ad. & hgr. 



Upper Congo. 



