414 



SILUKID.'E. 



auterior third of pectoral spine ; mandibular barbels with short branches, 

 especially near base, where they are tubercular, outer 3 times as long as 

 inner. Gill-openings not extending downwards beyond root of pectoral 

 spine. Occipito-nuchal shield rough like occiput, tectiform, a little 

 longer than broad, with rounded posterior processes. Humeral process 

 rough with granular asperities, keeled, narrow, sharply pointed, extending 

 nearly as far back as occipito-nuchal shield. Skin of whole body, in- 

 cluding adipose fin, with small, closely-set, granular papillae. Dorsal I 7 ; 

 spine feebly curved, a little shorter than head, striated, smooth in front, 

 serrated behind. Adipose dorsal 4 times as long as deep, 2^ to 3^ times 

 as long as its distance from rayed dorsal. Anal III 8, rounded. Pectoral 



Fig. 311. 



Synodontis granvlosus. 

 Type (Tr. Z. S. 1901). k. 



spine as long as dorsal, feebly serrated on outer border, strongly on inner, 

 not reaching ventral. Ventral not reaching anal. Caudal deeply 

 notched. Caudal peduncle a little longer than deep. Olive above, 

 yellowish beneath ; dorsal, anal, and paired fins black in front, orange 

 behind ; caudal black, with a broad orange posterior margin. 



Total length 230 millira. 



Lake Tanganyika. 

 1-3. Types. North end o£ L. Tanganyika. Prof. J. E. S. Moore (C). 



