106 CHABACINIDjE. 



in very young specimens, which, as in the other species, are absolutely devoid of dark 

 markings on the body. 



The largest specimen examined by me measures 420 millimetres, but the fish is 

 believed to grow to a still larger size. 



Hydrocyon lineatus, originally described from Ashantee, occurs in the White Nile 

 and in the Blue Nile ; it is also found in the Niger, in the St. Paul's River, Liberia, 

 the Congo and Ubanghi, Lake Tanganyika, Lake Mweru, the Zambesi system, and as 

 far south as the Limpopo River in the Transvaal. Castelnau's Hydrocynus vittatus 

 from Lake Ngami is probably the same species *. 



List of specimens examined : — 



1 Ashmed Aga, White Nile.— Loat, 14.1.01. 



2 Polkom, Baro R. (Sobat).— Zaphiro, 4.04. 



7 Mouth of Lake No, "White Nile.— Loat, 4-10.2.01. 



5 Gondokoro.— Loat, 1-17.2.02. 



1 Wad Medine, Blue Nile.— Loat, 5.10.01. 



1 West Africa. 



1 Niger. 



1 Nyankoma, Gold Coast.— R. B. N. Walker, 1901. 



1 n. Offin, Gold Coast.— R. B. N. Walker, 1901. 



1 R. Benue, north of Ibi. — Norton Smith, 1906. 



1 Fort Don Carlos I., Angola, at junction of Combo R. with Kwango R. — Dr. Ansorge, 1903. 



1 Leopoldville, Congo. — Delhez, 1898. 



3 Lake Obeke, Congo.— Delhez, 1898. 



1 Bolobo, Congo.— Rev. G. Grenfell, 1900. 



a New Antwerp, Congo. — Capt. Wilverth, 1896. 



1 Stanley Falls.— Rev. W. H. Bentley, 1897. 



1 Banzyville, Ubanghi. — Capt. Royaux, 1900. 



1 Lake Tanganyika.— J. E. S. Moore, 1897. 



1 Lake Mweru. — Sir A. Sharpe, 1900. 



2 Unguezi, Shire River. — Dr. Livingstone. 



* In which case the name Hydrocyon lineatus will have to be changed to H. vittatus, and that of H. vittatus, 

 bestowed by me on a Congo species, to H, vittiger, here proposed as a substitute. Castelnau's description 

 is not sufficiently detailed to make quite sure of the identification, the type specimens are unfortunately 

 Jost, and in the lack of specimens from Lake Ngami to compare with the description it is more prudent to 

 retain Bleeker's name H. lineatus for the present. 



