STNODONTIS. 



417 



mandibular teeth not quite \ diameter of eye, about 30 in number. 

 Maxillary barbel with a narrow marginal membrane at base, 1-g- times 

 length of head, reaching a little beyond middle of pectoral spine ; outer 

 mandibular barbel about twice as long as inner, both with long slender 

 branches without ramifications, except at the base of the inner, where 

 they are more tubercular. Gill-opening not extending downwards 

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

 occiput, obtusely tectiform, 1-g- times as long as broad, with obtuse 

 posterior processes. Humeral process much longer than broad, not 

 keeled, pointed, extending as far back as occipito-nuchal process. 



Fig. 313. 



Synodontis nigroinaculatus. 

 Type. i. 



Dorsal I 7 ; spine as long as head, nearly straight, smooth in front, 

 rather feebly serrated behind. Adipose dorsal 4 limes as long as deep, 

 2-g- times as long as its distance from rayed dorsal. Anal IV 7, obtusely 

 pointed in front. Pectoral spine as long as head, strongly serrated on 

 both sides, nearly reaching ventral. Ventral not reaching anal. Caudal 

 deeply forked, upper lobe the longer. Caudal peduncle a little longer 

 than deep. Greyish above, white beneath, covered all over with round 

 black spots, some of which, especially on the posterior part of the body, 

 are confluent into vermicular lines. 



Total length 210 millim. 



Lake Bangwelu. 

 1, Type. L. Bangwelu. F. H. Melland, Esq. (P.). 



VOL. II. 2 E 



