344 SILUBIDJL 



27. Ad. Gondokoro, Bahr-el-Gebel. L. Loat, Esq. (C). 



28-29. Yg. Ngatana, Tana R. Prof. J. W . Gregory (P.). 



30. Head of ad. L. Chad. Capt. G. B. Gosling (P.). 



31-32. Hgr. Kano, Hadeija R., Chad „ 



Basin. 



33. Ad. St. Louis, Senegal. M. P. Delhez (CI.). 



34-36. Yg. Kaedi, „ 



37. Ad. Niger. Mr. J. T. Dalton (C). 



38. Ad. „ W. A. Forbes, Esq. (P.). 

 39-41. Ad. & hgr. Mureji, Upp. Niger. J. S. Budgett, Esq. (P.). 

 42. Hgr. Oguta, Low. Niger. Dr. AV. J. Ansorge (C). 

 43-45. Yg. Abo, 



46. Yg. R. Benue, N. of Ibi. H. L. Norton Traill, Esq. 



(C). 



17. GEPHYROGLANIS. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 42 (1899), and Poiss. Bass. Congo, p. 292 

 (1901). 



Distinguished from Chrysichthys by the absence of teeth on the 

 palate. Nasal barbel short, sometimes hardly developed. 

 Tropical and South Africa. 



Synopsis of the Species. 



I. Nasal barbel \ to ^ diameter of eye ; maxillary barbel shorter than head. 



a. Maxillary barbel not more than g length 



of head ; folded dorsal fin not extending 



to the adipose. 



Anal with 8 branched rays ; adipose fin a little 



shorter than rayed dorsal ; caudal with acutely 



pointed lobes ; occiput feebly granulate . . 1. G. conyicus, Blgr., p. 345. 

 Anal with 10 branched rays ; adipose fin a little 

 longer than rayed dorsal ; caudal with acutely 

 pointed lobes ; four longitudinal ridges on the [p. 346. 



vertex; occiput strongly rugose 2. G. ogoensis, Pellegr., 



Anal with 11 to 13 branched rays; adipose fin longer 

 than rayed dorsal ; caudal with obtuse lobes ; 

 head smooth 3. G. sclateri, Blgr., p. 346. 



b. Maxillary barbel a little shorter than head ; 

 folded dorsal reaching adipose ; anal with 

 8 branched rays ; caudal with acutely 

 pointed lobes ; occiput striated . . . . 4. G. tilhoi, Pellegr., p. 348. 



