FISHES FROM BRITISH EAST AFRICA. 675 



edged above with a streak of black pigment ; fins white and 

 transpai'ent, or pale orange at the base. 



Total length 55 ram. 



Numerous specimens from the Eusso Nyiro below the falls. 



Closely allied to B. oieglecius Blgr. from the Nile, and strikingly 

 resembling the preceding species in general appearance, although 

 differing widely in the feeble, non-serrated last simple dorsal ray 

 and in. the much lower nvimber of scales. 



11. Olarias lazera Lacep. 



Eusso Nyiro, near the Lorian Swamp. 



12. EuTROPius BEPRESSiROSTRis Peters. 



13. Bagrus urostigma Yincig. 



Eusso Nyiro, above the Chandler Falls. 



14. Clarotes laticeps Riipp. 



15. Amphilius grandis Blgr. 



16. Amphilius oxyrhinus, sp. n. (PI. LXXX.) 



Depth of body 6 times in total length, length of head 3| times. 

 Head much depressed, slightly longer than broad ; snout pointed, 

 ^ length of head; eye very small, 11 times in length of head, 

 2| times in interorbital width ; posterior nostril midway between 

 eye and end of snout ; maxillary barbel | length of head, reaching 

 root of pectoral ; outer mandibular barbel 5 length of head, inner 

 nearly |. Gill-rakers rather long, 7 on lower part of anterior 

 arch. Dorsal I 6, much nearer end of snout than root of caudal. 

 Adipose dorsal low, 3| times as long as deep, twice as long as 

 rayed dorsal, its length | its distance from latter. Anal III 5. 

 Pectoral a little more than | length of head. Ventral a little 

 shorter than pectoral, far behind base of dorsal. Caudal feebly 

 emarginate. Caudal peduncle Ig times as long as deep. Reddish 

 brown above, spotted with blackish, dirty white beneath. 



Total length 195 mm. 



Distinguished from A . grandis by the pointed snout, the longer 

 caudal peduncle, and fewer anal rays. 



A single specimen from the Eusso Mara, a swift mountain- 

 stream. 



17. Synodontis schall Bl. Schn. 



18. Synodontis geledensis Gthr. 



From the Eusso Nyiro, close to the Lorian Swamp. 



19. Tilapia nilotica L. 



From the Eusso Nyiro, above and below the falls. 



