Some African Rotifers. By J. Murray. 



In this paper I am enabled to add to the results obtained from 

 Mr. Pearce's material three species which were not so completely 

 studied as to be published with the others. They are two tube- 

 dwelling species of Habrotrocha, H. caudata and H. ampulla, and 

 a Mniobia, M. scabrosa. Only dead specimens were got in Mr. 

 Pearce's moss. The animals have since been seen alive, both in 

 Central and South Africa (and M. scabrosa even in Australia), and 

 fuller studies have thus been rendered possible. 



List of Species. 



Philodina rugosa Bitch (4). 

 P. plena Bryce (3). 

 P. vorax JansoTi {12). 

 Pleuretra alpium Ehr. {10). 

 P. brycei Weber {23). 

 P. humerosa Murray (14). 

 Gallidina habita, Bryce {3). 

 G.formosa Murray {15). 

 C.pliciita Bryce {!). 

 G. punctata sp. n. 

 G. allani sp. n. 

 G. papillosa Thomp. {22). 

 G. aculeata Milne (18). 

 G. multispinosa Thomp. (22). 

 G.pinniger Murray (19). 

 Mniobia tetraodon Ehr. (9). 

 M. russeola Zel. (24). 



M. scarlatina Ehr. (10). 



M. scabrosa sp. n. 



Rotifer longirostris Janson (12). 



Habrotrocha perforata Murray (15). 



H. caudata sp. n. 



H. ampulla sp. n. 



H. longiceps Murray (17). 



H. pus ilia Bryce (2). 



H. acornis sp. n. 



H. constricta Duj. (7). 



H. appendiculata sp. n. 



H. brocklehursti sp. n. 



H. auriculata sp. n. 



Adineta vaga Davis (6). 



A. barbata Janson (12). 



A. longicornis Murray (15). 



Notes on the Species. 



Philodina plena Bryce (3). 

 Synonym : Gallidina plena. 



The egg of Philodina plena is of unusual form. It is elliptical, 

 with both poles produced into processes. It is not circular in trans- 

 verse section, but a good deal flattened. Looking at its broad side, 

 the whole outline shows a series of rounded knobs. Looking at 

 the narrow side, the projections are seen to be rounded ridges, 

 which are highest at the side and die out on the flat surface of the 

 egg. They are like interrupted annulse. In examples from 

 Kikuyu there were about ten of these prominences, including those 

 at the poles. 



Philodina vorax Janson (12). 

 Synonym: Callidina vorax. 



This species appears to be commoner in warm climates than in 

 temperate, In Kikuyu it appears as a distinct variety, smaller 

 than the type, and with the spurs narrower and with very small 

 points. 



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