FAUNA OF THE AFRICAN LAKES. 



551 



and it is quite surprising to find that in this instance Tanganyika 

 does not take the first place with the largest number of different 

 forms. This position is held by Victoria Nyanza with 18 species, 

 but Tanganyika follows very closel}' with 17, and maintains its 

 reputation to some extent by exhibiting the highest number of 

 endemic species and even certain endemic genera. In the 

 following table no column is provided for Kivu, since there is 

 only a doubtful record of Lamellibranchs from that lake *. 



Name of Species. 



of Distrihulion of Lamellihraiichiata t. 



Taifgaii- Victoria 

 yika. Nyanza, 



Nyasa. 



Albert 

 Nyanza, 



Edward 

 Nyanza. 



Other parts of 

 the world. 



Family Cyeenid^. 



Corbicula astartiua 



„ cunningtoni 



„ radiata P 



Family Sph^riid^. 



Spha^rium nyanzte 



„ stiihlmanni 



„ victoria; 



Eupera parasitica 



Family Unionidj2. 



Uuio acuminatus 



„ segyptiacus 



5, bakeri 



„ bohmi E 



„ borellii 



„ burtoni E 



„ cailliaudi 



„ calathus 



„ emini 



„ gerrardi E 



„ grandidieri 



„ hauttecceuri 



„ horei E, 



„ hypsiprymnus 



„ kirki 



„ lechaptoisi 



„ liederi 



„ lourdeli 



., monceti 



„ mossambicensis 



„ multicolor 



„ ngesianus 



„ nyassaonsis 



„ rostralis E 



„ ruellaiii 



„ stuhlmanni 



Zambezi. 

 P E. Africa, Nile. 



P F. Africa. 



Nile, Abyssinia. 



Nile. 

 Nile. 



Nyasaland. 

 E. Africa. 



Zambezi, E.Afri 



Angoni Land. 



* Speaking of the fauna of Kivu, Moore refers to " one or two species of fresh- 

 waten" bivalves, closely allied to the Unios found generally in the African lakes" 

 (137, p. 129). Against this assertion is to be set the statement of the naturalist 

 at the head of the German Central Africa Expedition, '• Ebenso scheinen lebende 

 Lamellibranchier zu fehlen " (156, p. xiv). 



t The principal sources which may be consulted for information on the Lamelli- 

 branchs are Smith (170) and von Martens (116). 



