526 Mr. G. A. Boulenger on some 



than dorsal, serrated like it on outer border, with very strong 

 retrorse teeth on inner border. A long, sharp, humeral pro- 

 cess. Ventral not reaching anal. Caudal forked. Caudal 

 peduncle nearly twice as long as deep. Pale greyish olive 

 above, speckled and marbled with blackish ; two more or less 

 distinct, irregular, dark bands across the back, one under each 

 of the dorsal fins ; belly white ; dorsals and caudal with 

 blackish dots. 



Total length 55 millim. 



The type specimen is not to be found in the Paris 

 Museum. 



The figures given by Joannis are very incorrect, as may be 

 inferred from the discrepancies between them. A comparison 

 of specimens obtained by Mr. Loat at Assuan with the type 

 of Wiinoglanis typus, from Gondokoro, and those of R. Van- 

 nutellii, from Lake Rudolf, has convinced me that these 

 supposed species cannot be maintained as distinct from 

 Mochocus niloticus. 



5. DOUMEA. 



Donmea, Sauvage, Bull. Soc. Philom. (7) iii. 1878, p. 96, and N. Arch, 

 du Mus. (2) iii. 1880, p. 41. 



Body elongate, depressed, with extremely slender caudal 

 peduncle. Two short dorsal fins, the anterior entirely in 

 advance of the ventrals and formed of one simple, flexible, 

 and 6 branched rays, the second opposed to the anal and 

 formed of fine soft rays partly concealed in adipose tissue ; 

 pectoral and ventral fins large, horizontally expanded, with- 

 out spine, but with thickened, simple outer ray; 12 rays to 

 the pectoral, 6 to the ventral. No cephalo-nuchal shield. 

 Mouth small, inferior, surrounded with large papillose lips; 

 no mandibular teeth ; small conical prsemaxillary teeth * ; a 

 maxillary and two mandibular barbels on each side; nostrils 

 rather remote from each other, both with a valve ; eyes 

 small, without free border. Gill-clefts narrowly interrupted 

 at the isthmus. 



A single species. 



Sauvage referred this genus to the u Pimelodin(e" of 

 Gunther. Vaillant (Bull. Mus. Paris, 1897, p. 82), on the 

 contrary, referred it to the vicinity of Synodontis, a view in 

 which I entirely concur. 



* The " vomerine " teeth of Sauvage. 



