SlMKlD.i;. 30-:) 



1. (iElilYHUlil.AMS TIl.lIOl, Pelle^r. 

 r.llegr. Poiss. Bass. Tchad, p. 101, \>\. i. liji'. 1 (1914). 



•l.T. GKrHYR0GL.\Xl8 G VMNOKHYNCHUS. 



J'appcnli. in Scliubotz, Wiss. Ergebn. Deutscli. Z.-Afr. Expecl., Zool. iii. p. 248, 

 pi. iv. fig. 6 (1S)14). 



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

 Head moderately depressed, 1| 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-subtruncate, 

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

 to interorbital width ; prsemaxillary band of teeth nearly straight; no 

 nasal barbel ; maxillary barbel a little over f lengtli of head, outer | and 

 nearly 1| times as long as inner. Dorsal 16, not reaching adipose fin 

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

 {'o length of head ; first and second soft rays longest, slightly shorter 

 than head. Adipose dorsal a liftle deeper than long, its base j that of 

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

 branched. Pectoral s])ine strongly serrated on inner side, | length 

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

 nearly 2^ times as long as deep. Brownish abo\e, silvery on the sides 

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



Total length 78 millim. 



Aruwimi Kiver, Congo. — Type in Berlin Museum. 



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

 entirely absent. 



:ui. GEPHYROdL.^NlS HABERERI. 



Steind. Anz. Ak. A\ i.n. i;i]2. p. 44!". iuid Dcnk.-chr. Ak. \Vi(-ii, I.nx.kIx. 191S, 

 p. 36, pi. vi. 



Allied to G. /(tiu/iji/inii.". but nasal barbel extremely shrrt, anterior 

 biirbel f length ot head, and upj er surface of head cf)\ered with skin ; 

 dorsal not reaching adipose fin when folded. 



Total length 2-")0 millim. 



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

 Museum. 



vol.. IV. T 



