SYNODONTIS. 



459 



band ; movable mandibular teeth f diameter of eye, 18 in number. 

 Maxillary barbel with a broad marginal membrane at the base, I5 times 

 length of head, reaching middle of pectoral spine ; outer mandibular 

 barbel as long as head, aboiit twice as long as inner, former with long 

 slender branches, latter with shorter, ramified branches. Gill-opening 

 not extending downwards beyond root of pectoral fin. Occipito-nucbal 

 shield rough like the occiput, with a blunt keel, 1^ times as long as 

 broad, squarely truncate posteriorly. Humeral process much longer than 

 broad, with feeble keel, rugose, acutely pointed, extending as far back 



Fig. 344. 



Si/nodontis gelechnsis. 

 Type, f 



as.occipito-nuchal process. Skin strongly villose on the sides. Dorsal 

 1 7 ; spine nearly straight, f length of head, strongly serrated in front, 

 smooth behind. Adipose dorsal 4 times as long as deep, nearly 4 times 

 as long as its distance from rayed dorsal. Anal IV 8, obtusely pointed 

 in front. Pectoral spine as long as head, nearly reaching ventral, outer 

 border strongly, inner rather feebly serrated. Ventral not reaching 

 anal. Caudal deeply forked. Caudal peduncle deeper than long. 

 Brownish above, whitish beneath. 



Total length 270 millim. 



"NVebi Shebeli, East Africa. 

 1. Type. Gelcdi, Shebeli R. Dr. Donaldson Smith ((.'.). 



