456 



SILUKEDjE. 



distinctly margined, extending about to middle of pectoral spine ; 

 mandibular barbels with obtuse or tubercular branches, outer at least 

 twice as long as inner. Gill-opening not extending downwards beyond 

 root of pectoral spine. Occipito-nuchal shield rough like the occiput, 

 obtusely tectiform, not or but slightly longer than broad, posterior pro- 

 cesses rounded. Humeral process rugose, acutely pointed, extending as 

 far back as occipito-nuchal process. Dorsal I 7 ; spine nearly as long 

 as head, striated, strongly serrated in front, with a few very feeble serrse 

 behind. Adipose dorsal rather small, not longer than its distance from 

 the rayed dorsal. Anal III 8-9, rounded or obtusely pointed in front. 

 Pectoral spine strongly serrated on outer side, still more strongly on 



Fig. 342. 



Synodontis batesii. 

 Type. 



inner. Ventral nearly reaching anal. Caudal deeply notched. Caudal 

 peduncle longer than deep. Brown, blotched and marbled with darker, 

 with three broad irregular dark bands, the first below the dorsal fin, the 

 second below the adipose, the third in front of the caudal fin ; fins pale 

 brown or whitish, with black spots. 



Total length 115 millim. 



Ja River (Congo System), South Cameroon. 



1-8, 9-10. Types. Bitye. G. L. Bates, Esq. (C). 



11-12. Ad. 



" ■» 



13. Ad. Efavong. 



14. Skfil. 



