DISTICH0DU8. 267 



snout not compressed, projecting a little beyond mouth, 1^ to If times 

 as long as eye, which is S^ (young) to 5J times in length of head ; inter- 

 orbital Avidth 11 to IJ times length of snout, about J 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 22-25 

 (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 l 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 ^^, 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. 



Congo. 



1. Ad. Cataracts of Manyanga. Capt. Wilverth (C). 



2. Yg., type. Kinshassa, Stanley Pool. M. A. GreshofF (C.) ; 



Utrecht University (E.). 

 3-4. Yg. Kutu, L. Leopold II. M. P. Delhez (C). 



5, 6. Ad. & yg. Monsombe, Upper Congo. Rev. J. H. Weeks (P.). 



7. Ad. New Antwerp, „ Capt. Wilverth (C). 



8-10. Ad. & hgr. Upper Congo. 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 2| times in total length, length of head 3§ to 4§ 

 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-j (young) to 

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

 snout, ■§• 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 

 from 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, M'ith rounded or obtusely pointed lobes. Caudal 



