838 



SILURID^:. 



narrowly interrupted in the middle ; nasal barbel J to J length of head ; 

 maxillary barbel as long as or a little longer than head, sometimes ter- 

 minating in a small warty club-shaped expansion ; outer mandibular 

 barbel f to f length of head, inner ^ to f. Gill-rakers moderate, 9 or 

 10 on lower part of anterior arch. Dorsal I 6, equally distant from root 

 of caudal and from end of snout or a little nearer the latter; spine not 

 serrated, f length of head ; first soft ray longest, shorter than head. 

 Adipose dorsal 2 or 3 times as long as deep, nearly as long as rayed 

 dorsal, from which it is separated by a space equal to twice its base. 

 Anal 1.1-13, 6-8 rays branched. Pectoral spine as long as dorsal, 

 finely denticulate on outer border, strongly serrated on inner. Caudal 



Fi£r. 2G4. 



Clirysichiliijs ornatus. 

 Type (A. M. C). f. 



deeply forked, with pointed lobes, longest rays 2 to 2J times length of 

 median. Caudal peduncle a little longer than deep. Brown above, 

 speckled with blackish and with broad blackish bands ; one of these 

 extends from the operculum to the base of the dorsal, forming a crescent 

 on the nape ; another on each side of the body sending off an upper 

 branch to the adipose fin ; a narrow interorbital cross-band ; fins spotted 

 with blackish ; a blackish band on each lobe of the caudal ; lower parts 

 white. 



Total length 190 millim. 



Upper Congo and Ubanghi. 

 1-3. Types. Monsembe, Upp. Congo. Rev. J. H. Weeks (P.). 



