Fishes collected at Gondokoro. 263 



Cyprinidae. 



18. Laheo couhie, Eiipp. 



19. Bai-bus perince, B.[ipY). 



20. Barhus camptacanlhus, Blkr. 



21. Barilius niloti'cus, Joannis. 



22. Barilius Loati, Blgr. 



Found abundant in running water. 



23. Chelcethiops bihie, Joannis. 



Several specimens were obtained, together with Barilius 

 niloticus, Nannocharaou niloticus^ and Mochocus niloticus. 



Siluridse. 



24. Clarias lazera, C. & V. 



25. Sckilbe mystus^ C. & V. 

 From the lake. 



26. Clarotes laticejys, Eiipp. 



27. ChrysichtJiys auratus, Geoffr. 



28. Auchenoglanis biscutatus, GeofFr. 



29. Auchenoglanis occidentalism C. & V. 



Two species have been confounded under the name of 

 A. biscutatus, both occurring in the Nile and the Senegal. 

 A. occidentalism to which the Chartoura specimens of Petherick's 

 collection belong, difiers in the longer snout (longer than the 

 rest of the head), the shorter maxillary barbel (not extending 

 beyond the centre of the eye), and the dark spots on the fins, 

 if present, larger and separated by a network of the ground- 

 colour. A. biscutatus was by far the commoner of the two at 

 Gondokoro. 



30. Synodontis schall, Bl. Schn. 



31. Synodontis frontosus, Vaill. 



32. Synodontis batensoda, Eiipp. 

 From the lake. 



33. Mochocus niloticus, Joannis. 



Cichlidae. 



34. Hemichromis bimaculatus, Gill. 



