SILUBID.E. 305 



4. GEPHYROGLANLS TILHOI, Pellegr. 

 Pellegr. Poiss. Bass. Tchad, p. 101, pi. i. Hg. 4 (1914). 



4 a. GBPHYROGLANIS GYMNORHYNOHUS. 

 Pappenh. in Schubotz, Wiss. Ergebn. Deutsch. Z.-Afr. Exped., Zool. iii. p. 248, 

 pi. iv. fig. 6 (1914). 



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

 Head moderately depressed, If times as long as broad, granulated and 

 striated on the vertex and occiput ; occipital process rather longer than 

 broad, in contact with interneural shield ; snout conical-subtrimcate, 

 nearly as long as eye, which is oval and 3 times in length of head, equal 

 to interorbital width ; pra?maxillary band of teeth nearly straight ; no 

 nasal barbel ; maxillary barbel a little over f length of head, outer \ and 

 nearly If times as long as inner. Dorsal I b, not reaching adipose fin 

 when folded ; spine feebly serrated on both sides towards the extremity, 

 yq length of head ; first and second soft rays longest, slightly shorter 

 than head. Adipose dorsal a little deeper than long, its base -f that of 

 rayed dorsal and about \ its distance from latter. Anal 12, 9 rays 

 branched. Pectoral spine strongly serrated on inner side, § length 

 of head. Caudal deeply forked, with pointed lobes. Caudal peduncle 

 nearly 2\ times as long as deep. Brownish above, silvery on the sides 

 and beneath ; a blackish spot behind the gill-cover. 



Total length 78 millim. 



Aruwimi River, Congo. — Type in Berlin Museum. 



Closely allied to G. tilhoi, but dorsal not produced and nasal barbel 

 entirely absent. 



5 a. GEPHYHOGLANIS HABERERI. 



Steind. Anz. Ak. "Y\ ien, 1912, p. 449, and Denkschr. Ak. Wien, Ixxxix. 1913, 

 p. 36, pi. vi. 



Allied to G. lovgipinnis, but nasal barbel extremely shrrt, anterior 

 barbel f length of head, and upper surface of head covered with skin ; 

 dorsal not reaching adipose fin when folded. 



Total length 250 millim. 



Ja River (Congo System), South Cameroon. — Type in Vienna 

 Museum. 



vol. iv. S 



