Fishes from the Kasai River {Contjo). G41 



now in mj hands for study, and I here offer a list of the 

 species represented in the Kasai collection : — 



1. Polypterus ornatipiunis, Blgr. 



This species was described in 1902 from a single specimen 

 from Monsembe, presented to the British Museum by the 

 Rev. J. II. Weeks. Tlie specimen from Lusambo is a little 

 larger than the type, measuring 46 centimetres. 10 dorsal 

 spines; 63 scales along the body, 24 between the occiput and 

 the first dorsal spine, 42 round the middle of tlie body. 



2. Morrmjrops attenuatus, Blgr. 



A single specimen, measuring 185 mm. D. 41 ; A. 64. 

 Lat. 1. 90. Depth of bo ly 8 times in total lengtli, length of 

 head oh times. 



3. Gnathonemus elephas, Blgr. 



4. Ilijdroci/ou lineatiis, Bikr. 



5. Alestes Liebrechtsiij Blgr. 

 6. Alestes Fuchsii, Blgr. 



7. Distichodus Atitonii, Schilth. 



8. Distichodus fasciolatus J Blgr. 

 9. Distichodus sexfasciatus, Blgr. 



10. Clarias lazera, C. & V. 



11. Chrysichthys Dutloni, sp. n. 



Depth of body 4|^ times in total length, length of head 3? 

 times. Head once and a half as long as broad, with granular 

 rugosities above ; eye one fourth length of head, nearly 

 equalling interorbital width ; snout broadly rounded, ex- 

 tending a little beyond lower jaw; voraero-pterygoid teeth 

 forming a long but very narrow band ; nasal barbel f diameter 

 of eye ; maxillary barbel a little longer than head, extending 

 nearly to extremity of pectoral spine. Dorsal I 6 ; spine 

 strong, serrated behind ; first soft ray as long as head ; 

 adipose fin as long as deep, its base a little more than its 

 distance from the rayed dorsal. Anal IV 7. Pectoral spine 

 I length of head, very strongly serrated behind. Caudal fin 

 deeply notched, with rounded lobes. Caudal peduncle nearly 



Ann. d: Mag. N. Hist. Ser. 7. Vol xvi. 42 



