ÖFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1895, N:0 3. 187 



close together in a single series. Maxillary barbel longer than 

 head, extending towards the iiiiddle of the humeral process, not 

 fringed. Mandibulary barbels fringed, especially the shorter inner 

 ones, with short and broad filaments. The pectoral spine stout, 

 depressed, striated, strongly serrated along both edges, as well 

 longer as stronger than the dorsal spine, but shorter than the 

 head. The dorsal spine is serrated behind but not in front 

 where only one obsolete denticulation can hardly be seen at the 

 tip, its length equals the distance from the tip of the snout to 

 the middle of the eye. It is thus smaller than in most species 

 already described, but this characteristic can possibly change 

 with age. The number of soft rays in the dorsal fin 7. The 

 humeral process is more than twice as long as it is high. The 

 nuchal carapace is longer than it is broad, extending beyond the 

 dorsal spine on the sides. The distance between the dorsal and 

 adipose fins is considerably longer than the base of the former 

 in one specimen, equals the same length in two. The length of 

 the adipose fin is contained about four times in the length of 

 the body, but the characteristics from the adipose fin seem not 

 to be very reliable. Number of anal rays 11 — 12, the first one 

 small. The ventral fins do not reach the anal fin. The caudal 

 fin is deeply forked. The length of the largest specimen is 52 

 mm. with caudal, 39 mm. without the same. The length of the 

 head is 12 mm. 



The coloration is blackish brown, marbled with white, fins 

 white, marbled with black. 



Malapterurus heninensis MuRRAY, Günther. 



This fish is, according to Mr. Y. Sjöstedt, the most common 

 of all freshwater fishes in the Cameroons especially in small 

 muddy rivulets. The natives like it very much as a foodfish 

 and catch it and other fishes in small seines and dipnets with a 

 semicircular opening, but dread their electric power. 



The larger specimens are uniform, dark coloured, somewhat 

 lighter below, with some scattered suiall round black spöts on the 

 sides of the body. 



