346 



CYPEIXID^E. 



Lake Tsana and upper tributaries of Blue Nile; Omo River; 

 Kilimandjaro. — Types in Senckenberg Museum, Frankfort (M.). 



Mr. E. Degen (C). 

 Mr. P. 0. Zaphiro (C.) ; 

 W. N. McMillan (P.). 



1-3. Ad. , 



& hgr. 



Bahardar, Lake Tsana. 



4-7. AJ. 







Matti P., affluent of. Gudar R. 

 • (Blue Nile). 



8. Skel. 







»> 55 » 



9. Ad. 







Didessa R. (Blue Nile), 1500 ft. 



10-11. Ad. 







Juju R., affluent of Dides^a R., 

 2000 ft. 



12-17. Ad. 







Gibe R. (Omo), 2800 ft. 



18-19. Ad. 



& 



hgr. 



Nairobi R., Kilimandjaro, 

 6500 ft. 



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



2. DISOOGNATHUS JOHNSTONII. 



Bouleng. Proc. Zool. Soc. 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, 1J 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. 1\ times in interorbital width ; width of mouth 

 \ length of head ; upper lip feebly developed, not fringed ; lower lip 



Pis. 260. 



Discognathus johnstonii. 

 Type(F.N.). f 



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 f 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 if, 4 between lateral line and root of ventral, 16 round caudal 



