or FISHES FEOM LAKES TANGANYIKA AND KIVU. 139 



Lake Tanganyika and made np a list of 43 species. Through the collections formed 

 since by the OfHcers of the Congo Free State and by Mr. Moore, the number has now 

 risen to 91 — that is, nearly as many as are known from the Nile (anadromous and 

 catadromous species not included). Out of these 91 species it has been ray privilege 

 to describe as many as 74, and I beg on this occasion to express my most grateful 

 thanks to my friend Mr. Moore, and to my fellow-countrymen in the service of the 

 Congo Free State, for having placed in my hands the valuable material brought home 

 at the cost of so great perils and hardships. 



List of the Fishes of Lakes Tanganyika and Kivu. 

 The names of the genera and species peculiar to these lakes are printed in italic, 

 the others in roman, in the Table (pp. 140-141). 



The 7 columns refer to the various collections on which the list is based : — • 



1. Mr. Coode Hore' s Collection (Giinther, P. Z. S. 1893, p. G28). 



2. Mr. Moore's first Collection (Boulenger, Tr. Zool. Soc. xv. 1898, p. 1). 



3. Capt. Descamps's Collection (Boulenger, I. c). 



4. Lieut. Lemaire's Collection (Boulenger, op. cit. 1899, p. 87). 



5. Capt. Hecq's Collection (Boulenger, Ann. Mus. Congo, Zool. i. 1899 & 1900). 



6. Mr. Moore's second Collection from Tanganyika. 



7. Mr. Moore's Collection from Kivu. 



In the eighth column the range outside the Tanganyika district is indicated. 



The following deductions may be drawn from the Table; — 



1. Endemic genera occur only in the family Cichlidce, but these are remarkably 



numerous (17), nearly equalling in number those known from all other parts 

 of the world. 



2. Most of the species of Cichlidw and all the Cyprinidce and Mastacembelidrt? are 



endemic, whilst all the Characinidce and one-half the Siluridoe have a much 

 W'ider range. 



3. Not one of the collections yet made contains representatives of much more 



than one-half of the known species i, and out of the six species represented 

 in the first collection (Mr. Coode Hore's) only three have been rediscovered. 



' Mr. Moore wishes me to observe, however, that, owing to the difficulties ot transport, he abstained in 

 many cases from preserving specimens of the species which he felt certain of having obtained on his first 

 expedition. The fact nevertheless remains that the collections made by him are so far from being duplicated 

 by those received from the Belgian explorers as to show our knowledge of tlie Fishes of the lake to be still 

 far from complete. Although Mr. Moore fished not far from Albertville, it is surprising how many species 

 discovered about the latter place by Capt. Heoi] are unrepresented in his collection. He also fished near 

 Ujiji, and yet examples of only two out of the six species described by Dr. Giinther from Mr. Coode Hore's 

 collection have turned up again. 



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