346 



CTPEINID^. 



Lake Tsana 

 EjLlimandjaro.- 



1-3. Ad. & hgr. 

 4-7. Ad. 



8. Skel. 



9. Ad. 

 10-11. Ad. 



12-17. Ad. 

 18-19. Ad. & hgr. 



and upper tributaries of Blue Nile; Omo Elver; 

 -Types in Senckenberg Museum, Frankfort (M.). 

 Bahardar, Lake Tsana. Mr. E. Degen (C). 



Matti E., affluent of Gudar R. Mr. P. 0. Zaphiro (C.) ; 

 (Blue Nile). W. N. McMillan (P.). 



DidessaR. (Blue Nile), 1500 ft. 

 Juja R., affluent of Dides«a R., 



2000 ft. 

 Gibe R. (Omo), 2800 ft. 

 Nairobi R., Kilimandjaro, 



6500 ft. 



A. B. Percival, Esq. (C). 



2. DISGOGNATHUS JOHNSTONII. 

 Bouleng. Proc. Zool. Sec. 1901, ii. p. 159, and Fish. Nile, p. 184, pi. xxxii. fig. 2 

 (1907). 

 Body feebly compressed, its depth equal to length of head and 5 times 

 in total length. Head moderately depressed, IJ to 1^ times as long as 

 broad, with rounded, feebly projecting snout and nearly flat interorbital 

 region ; eye supero-lateral, in second half of head, its diameter 4-| times 

 in length of head. 2^ times in interorbital width ; width of mouth 

 ^ length of head; upjjer lip feebly developed, not fringed; lower lip 



rig. 260. 



Discognaihus johnstonii. 



Type (F. N.). 



embracing a mental disk, which is much broader than long ; 2 minute 

 barbels on each side, not measuring ^ diameter of eye. Dorsal III 7, 

 equally distant from nostrils and from caudal ; longest ray f length of 

 head. Anal II 5. Pectoral y length of head, widely separated from 

 ventral, which is situated below posterior half of dorsal. Caudal deeply 

 emarginate. Caudal peduncle 1^ times as long as deep. Scales 

 37-38 sf, 4 between lateral Una and root of ventral, 16 round caudal 



