On some Freshwater Fishes from Lower Congo. 167 



XXII. — On some Freshwater Fishes from Lower Congo. 



By ElNAR LoNNBEKG and HlALMAR RENDAHL. 



The R. Nat. Hist. Museum in Stockholm has recently 

 received from the Swedish missionary, Rev. K. E. Laman, 

 D.D., a small collection of freshwater fishes collected in 

 Lower Congo, partly at Mukimbungu in Belgian Congo and 

 partly at Kingoyi at the watershed between French and 

 Belgian Congo. This collection does not contain more than 

 twenty different species, but it proved at a closer examination 

 to be quite valuable, because not less than six of these species 

 appear to be new. A rather unexpected discovery was also 

 the find of a member of the East-African genus Diseognathus 

 in Lower Congo. 



Mormyrops delt'ciosus, Leach. 



Native name " Mbono." 



Locality. Congo River, Mukimbungu. 



One specimen, about 60 cm. in total length. 



Labeo longipinniSf Blgr. 



Native name "Lombuka." 



Locality. Congo River, Mukimbungu. 



One specimen, measuring about 22 cm. in tot;il length. 



This specimen agrees on the whole quite well with 

 Bouleriger's description. The pectoral is, however, not quite 

 as long as the head, and it does not reach the ventral. The 

 length of the head is not contained fully four times in the 

 length of head and body. 



Labeo nanus, Blgr. 



Native name " Mbemba." 



Ijocality. Kwilu River, Mukimbungu. 



One specimen, 46*5 cm. in total length. 



This specimen differs from Boulenger's description in the 

 following points : — The head is large, so that its length is not 

 contained more than 3| times in total length, and the depth 

 of the body is only contained 3^ times in the same. It is 

 possible that these differences are due to the much larger size 

 o£ our specimen than those examined by Boulenger (19 cm.). 



