ON THE CICHLID FISHES OF LAKE VICTORIA. 157 



9. Tile Gichlid Fishes of Lake Victoria. By C. Tate Regan, 

 M.A., F.R.S., F.Z.S., Keeper of Zoolooy in the British 

 Museum (Natural History). 



[Received January 6, 1922 : Read February 21, 1922.] 

 (Plates I-IY. * ; Text-figures 1-14.) 



A revision of the Cichlidae of Lake Victoria is a much more 

 difficult task than tha,t of revising the Cichhdaj of Nyassa, 

 inasmuch as the types of all the described species from Nyassa 

 are in the collection of the British Museum (Natural History), 

 whereas a number of the types from Lake Victoria are in Paris, 

 Berlin, and Genoa. 



Dr. Pellegrin has kindly sent me notes on two or three species 

 in the collection of the Paris Museum about which I had some 

 doubts, and I am indebted to Mr. Boulenger for photographs 

 of the types of Hajjlochromis nuchisquamulatus, H. obliqioidens, 

 H. longirostris, and H. sauvagei, which were sent to him by the 

 late Professor Hilgendorf in 1898, and to Dr. Pappenheim for 

 information about the first two of these species. 



In Boulenger's ' Catalogue of African Freshwatei' Fishes ' 47 

 species of Cichlidee are described from Lake Victoria (including 

 the Victoria Nile, Lakes Salisbury, Kioga, etc.). The number 

 in the present revision is practically the same (50), but, as no less 

 than 18 species are described below as new and some others 

 formerly regarded as synonyms have been re-established, it will 

 be evident that a considerable number of species recognized by 

 Boulenger have been eliminated. 



A summa-iy of what is known of the Cichlidae of the great 

 African lakes may now be given t. 



From Lake Albert only three species have been recorded 

 (Tilapia jiilotica, Ilajjlochromis loingatii, and H. multicolor), all 

 of which occur also in the Bahr-el-Gebel. 



Tilapia nilotica is found inLakesEdward andKivu; in addition, 

 Lake Edward has a species of Tilajjia (T. eduardiana) which is 

 closely related to T. variahilis of Lake Victoria, 5 endemic species 

 of Hiqolochromis, 4 apparently related to H. cinereus and the fifth 

 to H. spekii, of Lake Victoria, and an endemic monotypic genus, 

 Schubotzia, distinguished from Haplochromis by the dentition. 



Kivu has five species of Haplochromis peculiar to the lake, of 

 which two seem to be related to H. cineretcs. 



From Tanganyika 89 species belonging to 37 genera are 

 known. Except 'Tilapia nilofAca, all these are endemic and the 

 majority of them belong to endemic genera. Nearly all the 

 Tanganyika Cichlidaj belong to genera which may have evolved 



* For explanation of the Plates see p. 191. 



t For Cichlidse of Lakes Edward and Kivu, see Ann. & MaR. Nat. Hist. (9) viii. 

 1921, p. 632 ; of Tansfanyika, Ann. & Mag. Nat. Hist. (9) v. 1920, p. 30 ; of Nyassa, 

 P. Z.S. 1921, p. 675.' 



