578 



DR. W. A. CU?fNINGTON ON THE 



KOTIFERA. 



The Rotifera of tLe African lakes are still very imperfectly 

 known, and the table of distribution which follows probably 

 gives quite an inadequate idea of the fauna. No information is 

 available for Lakes Edward and Kivu, and very little for Lake 

 Albert. Tanganyika, Victoria Nyanza, and Nyasa have been 

 better, though very unequally investigated. The latter has been 

 fairly well explored in this direction by the efforts of Fiilleborn, 

 who obtained numerous examples of the lake plankton and, in 

 addition, suitable material from neighbouring ponds, swamps, 

 and rivers. Tow-nettiugs from all three lakes were procured by 

 my expedition, the largest series coming from Tanganyika, but 

 with the single exception of samples taken in the broad mouth 

 of the Lofu liiver, which enters Tanganyika, I did not collect 

 outside the confines of the lakes themselves. Thus, while the 

 truly lacustrine types from Nyasa and Tanganyika may be fitly 

 compared, the Nyasa total is enormously swollen by species from 

 the adjoining neighbourhood, whereas the region around Tan- 

 ganyika remains almost entirely unexplored. In addition to my 

 small collections from Victoria Nyanza, there have been those of 

 Stuldmann, Borgert, and Alluaud, but the Rotifera of the rivers 

 etc., within its drainage area are likewise practically unknown. 



Table of Distribution of Rotifera f. 



Name of Species. '^^"?f J^^'^'^"'' Nyasa. ^^''^^'^ ^fcher parts of 



^ yika. Nyanza. ^ Nyanza. the world. 



Order Ploima. 



Notommata copeus 



„ pacliyura . . . . 



„ tripus 



Pleurotroclia daplinicola . 

 Cephalodella forticula . . . . 



Diascliiza forticata 



gibba 



„ tigridia 



Monommata orbis 



Dicranophorus auritus 



forcipatus 

 Encentrum caudatum .... 



Epipbanes oblonga 



„ clavuiatus .... 



„ lotos 



„ bracbionus 



spinosus .... 

 ? macrourus . 



P§ 



P§ 



P§ 

 P§ 



P§ 

 P^ 

 P§ 

 P§ 



Pi 

 p§ 

 p§ 



p§ 



E§ 

 P§ 



Europe, Asia, N. America. 



Europe, N. America. 



Cosmopolitan. 



Europe, N. America. 



Cosmopolitan. 



Europe, America. 



Cosmopolitan. 



Europe. 



Europe, N. America. 

 Europe, Asia, N. America. 

 Europe, Asia, N. America. 

 Europe, N. America. 



Europe. 

 Asia. 



Em'ope, S. America. 

 Asia Minor. 



t The principal sources from wbich this table has been compiled are Rousselet 

 (150), Collin (64), and Daday (76, p. 59), where further particulars will be found. 

 It is well to explain that the names under which the species are enumerated are 

 mostly those adopted by Harring in his "Synopsis of the Rotatoria", Washington, 

 1913. 



§ Not actually recorded from the lake itself, but from within its drainage area. 



