ÖPVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1895, N:0 3. 183 



scattered teetli behind the middle of the band. The band of 

 vomerine teeth is narrow, so tliat that of the intermaxillaries is 

 more than twice as broad. The lower jaw is provided with a 

 broad band of teeth. The proportion betAveen the band of teeth 

 of the vomer and the intermaxillaries seems to be a valuable 

 character vvhich cannot vary very much with age and by the 

 same Clarias camernnensis is easily recognized as difFerent from 

 Clarias niacromystax GÜNTHER and Clarias gahonensis GÜNTHER, 

 with which it otherwise has several affinities. The dorsal and 

 anal fins are not united with the caudal. The number of rays 

 in the dorsal fin 81, in the anal fin 59 or 60. The shape of 

 the dorsal fin is also different from that of Clarias gahonensis 

 Günther according to the picture given by Sauvage, ^) as it is 

 distinctly rounded behind, not angular. The pectoral spine is 

 serrated on the outside, niore than half as long as the fin. 



The largest specimen measures 88 mm. of which the caudal 

 fin measures 10 mm. The distance from the vent to the snout 

 is 7 mm. shorter than to the root of the caudal fin. The origin 

 of the dorsal fin is a little behind the tip of the pectorals. By 

 this character C. caraerunensis is also to be distinguished from 

 C. macromystax and C. gabonensis. The ventral fins are smaller 

 than the pectorals but reach a little beyond the origin of the 

 anal fin, in which respect this form is difFerent to C. gabonensis, 

 at least according to Sauvage's picture I. c. 



The coloration seems to have been uniform, but I dåre not 

 say more about it, as the specimens have been preserved for 

 some time in rum. 



The accessory branchial organ of the second branchial arch 

 is very small, and only provided with two short branches; that 

 of the second arch is larger and divided into several branches. 

 The gills of the third arch are still larger than the others and 

 extend further back into the accessory cavity. 



*) Sauvage: Faune ichthyologique de l'Ogüoue, Nouv. Arch. åa Museum, 2. 

 serie, T. 3. Pl. I lig. 2, Paris 1880. 



