530 



SILURID.E. 



10. CHRYSICHTHYS LONGIBARBIS. 



Chrysobagrus longibarbis, Bouleng. Ann. Mus. Congo, Zool. i. p. 4] , pi. xxi. fig. 2 



(1899). 

 Chrysichthys longibarhis, Bouleng. Poiss. Bass. Congo, p. 291 (1901). 



Depth of body 4^ to 5 times in total length, length of head 3^ to 3f 

 times. Head much depressed, lj times as long as broad, feebly rugose 

 above ; occipital process in contact with interneural shield ; snout 

 rounded, its length about f of head ; eye 3 (young) to 5 times in length 

 of head, 1 to 1J times in interorbital width ; mouth inferior, its width 

 2 to 2\ times in length of head ; pisemaxillary band of teeth feebly 

 curved, 4 to 5-| times as long as broad ; two short bands of vomerine 

 teeth, separated by a narrow interspace ; nasal barbel ^ to f diameter of 

 eye ; maxillary barbel 3 to 3J times as long as head ; outer mandibular 

 barbel a little longer than head, nearly twice as long as inner. Gill- 

 rakers moderate, 20-23 on lower part of anterior arch. Dorsal I 6, 

 1^ to 1J times as distant from root of caudal as from end of snout; 



Tiff. 258. 



ChrysicJitliys longibarhis. 

 Type (A. M. C). f. 



spine shorter than head, feebly serrated behind ; first soft ray longest, as 

 long as or a little longer than head. Adipose fin as long as deep or a 

 little longer than deep, its base less than that of the rayed dorsal and 

 measuring about half its distance from the latter. Anal 12-13, S or 9 

 rays branched. Pectoral spine f to f length of head, strongly seriated 

 on inner side. Caudal deeply forked ; lobes long and pointed, outer 



