227)' 



X. — Description of a netu Sikcrid Fish of the genus Gephyroglanis, 

 fivm South Africa. — By G. A. Boulengee, F.E.S. 



(Plate XIII.) 



The collection of South African fresh-water fishes in the Cape 

 Town Museum, which has been entrusted to me for naming by Mr. 

 Sclater, contains two examples of a Cat-fish from the Vaal Eiver, 

 which pertain to a new species referable to the remarkable genus 

 Gephyroglanis recently established by me for a fish from the Congo, 

 G. congicus/-' and to which two species have since been added, viz., 

 G. longipinnis,j- likewise from the Congo, and G. ogoensis, I from 

 the Ogowe. 



This addition to the famil)^ Siluriclce, so poorly represented in the 

 fresh waters of South Afiica, is of particular interest from the close 

 relationship of the new species, which I propose to name in honour 

 of Mr. W. L. Sclater, to those of the Congo and Ogowe basins. In 

 the following synopsis I have contrasted the characters by which 

 the four species may best be distinguished, and it will be observed 

 that these characters are comparatively slight. 



I. Maxillary barbel not more than | length of head ; 

 nasal barbel extremely short ; folded dorsal fin 

 not extending to the adipose. 



Anal with 8 branched rays ; adipose fin a little 

 shorter than rayed dorsal ; caudal with acutely 

 pointed lobes ; occiput feebly granulate . . . . 1. G. congicus, Blgr. 



Anal with 10 branched rays ; adipose fin a little 

 longer than rayed dorsal ; caudal with acutely 

 pointed lobes ; four longitudinal ridges on the 

 vertex ; occiput strongly rugose 2. G. ogoensis, Pellegr. 



* Ann. Mus. Congo, Zool. I, p. 42, pi. xx., fig. 2 (1899). 

 t Op. cit., p. 109, pi. xli., fig. 4. 

 + Pellegrin, Bull. Mus., Paris, 1900, p. 179. 

 20 



