348 silukim:. 



4. GEPHYROGLANIS TILHOI. 

 Pellegr. Bull. Mus. Paris, 1909, p. 243. 



Depth of body 5 times in total length, length of head 3£ times. 

 Head depressed, slightly striated on occiput and opercle ; occipital 

 process longer than broad and in contact with interneural shield ; snout 

 as long as eye, which is oval, hardly more than 3 times in length of 

 head, and exceeds a little interorbital width ; nasal barbel minute, 

 quite rudimentary ; maxillary barbel a little shorter than head; outer 

 mandibular barbel a little longer than inner and nearly jr length of 

 head ; mouth about ^ width of head. Dorsal I 6, reaching adipose 

 fin when folded, first soft ray produced into a filament, much longer than 

 head; spine f length of head. Base of adipose fin If times in its 

 distance from rayed dorsal. Anal 11,8 rays branched. Pectoral spine 

 about ^ length of head, strongly serrated on inner border. Caudal 

 deeply forked, with pointed lobes. Caudal peduncle a little longer than 

 deep. 



Total length 118 millim. 



Lake Chad. — Type in Paris Museum. 



5. GEPHYROGLANIS LONGIPINNIS. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 109, pi. xli. fig. 4 (1899), and Poiss. Buss. 

 Congo, p. 293 (1901). 



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

 times. Head moderately depressed, 1£ times as long as broad, rather 

 strongly granulated and striated above ; occipital process as long as 

 broad, in contact with interneural shield ; snout obtusely conical, as 

 long as eye; latter oval, about 3 times in head, 1 to 1§ times in inter- 

 ocular width ; nasal barbel ^ to \ diameter of eye ; maxillary barbel a 

 little longer than head ; outer mandibular barbel f length of head and 

 not quite twice length of inner ; mouth \ width of head ; prsemaxillary 

 band of teeth straight, about 3 times as long as broad. Dorsal I G, 

 reaching origin of adipose fin when folded, first and second soft rays as 

 long as head ; spine f length of head, feebly serrated behind. Adipose 

 fin about as long as deep, -f to § base of rayed dorsal, its base 2 to 1\ 

 in its distance from the latter. Anal 13-14, 8 or 9 rays branched. 

 Pectoral spine f length of head, strongly serrated on inner border. 

 Caudal deeply forked, with pointed lobes. Caudal peduncle \\ to If 



