348 SILUEID.E. 



4. GEPHYROGLANIS TILHOI. 

 Pellegr. Bull. Mns. Paris, 1900, p. 243. 



Depth of body 5 times in total length, length of head 3J 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 | length of 

 head ; mouth about \ width of head. Dorsal I G, 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 J 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. Mns. Congo, Zool. i. p. lO'J, pi. xli. fig. 4 (1899), and Poiss. Bass. 

 Congo, p. 293 (1901). 



Depth of body 4| to 5 times in total length, length of head 3 to 3J 

 times. Head moderately depressed, IJ 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 If times in inter- 

 ocular width ; nasal barbel ^ to J 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 | length of head, feebly serrated behind. Adipose 

 fin about as long as deep, f to f base of rayed dorsal, its base 2 to 2h 

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

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

 Caudal deeply forked, with pointed lobes. Caudal peduncle IJ to In 



