Observations on the Genus Volvox in Africa. 429 



any (De Toni in his Sylloge Algarum, 1889, gives no references) ; there 

 are certainly none in the collections examined by the following : 



KABENHOKST, L., Beitr. z. Kryptogamenfl. Siidafrik., Pilze u. Algeu, 



Allg. deutsch. naturh. Zeit., vol. i, 1855. 

 KEINSCH, P., " Contr. ad fl. Alg. aq. dulc. Promont. Bon Spei," 



Journ. Linn. Soc., Bot., vol. xvi, 1877. 

 NOKDSTEDT, 0., Lunds Univ. Arsskrift, vol. xvi, 1880, " De Algis et 



Characeis I " (Senegal). 

 WILLE, N., " Uber einige von J. Menyhardt in Siidafrika gesammelte 



Susswasseralgen,'' Oesterr. Bot. Zeitschr., 1903. 

 WEST, W. and G. S., " Algae from Central Africa," 1896, Journ. 



Bot., vol. xxxiv. 

 OSTENFELD, C. H., " Phytoplanktou aus dem Victoria Nyanza," 1908, 



Engl. Bot. Jahrb., Bd. 41. 



WEST, G. S., Ann. S. Afr. Mus., vol. ix, 1912 (South-West Africa). 

 FRITSCH, F. E., Ann. S. Afr. Mus., vol. ix, pt. 7, 1917 (mostly from the 



Cape Peninsula). 

 FRITSCH, F. E., and STEPHENS, E., Trans. Roy. Soc. S. Afr., vol. ix, 



pt. 1, 1921 (the Transkei Territories). 

 FRITSCH, F. E., and RICH, F., Trans. Roy. Soc. S. Afr., vol. xi, pt. 4, 



1924 (Natal). 

 HODGETTS, W. J., Trans. Roy. Soc. S. Afr., vol. xiii, pt. 1, 1925 



(Stellenbosch). 

 FRITSCH, F. E., and RICH, F., Trans. Roy. Soc. S. Afr., vol. xviii, pt. 1, 



1929 (Griqualand West). 

 HUBER-PESTALOZZI, G., Verh. Internat. Ver. Limnol., vol. iv, 1929 



(South African plankton). 



It was therefore of special interest when the present authors had 

 the opportunity of examining Volvox material collected in 1926 from 

 pools on the Cape Flats * by one of themselves and Miss E. L. Stephens 

 (of the University of Cape Town), and also some from Ovamboland 

 collected by Dr. K. H. Barnard and Dr. R. F. Lawrence (of the South 

 African Museum). Two years later, that is, in 1928, Mrs. G. E. 

 Hutchinson, who with her husband was engaged in making a survey 

 of the planktonic fauna of South African vleis and pans, found Volvox 

 in the Transvaal in five different pieces of water, namely, at Riet- 

 fontein, Brakpan, Leeuwkraal, Weltevreden West, and Potchefstroom 



* We find that Mr. Steer, Miss Stephens, and others had collected Volvox 

 regularly from the Cape Flats and Lakeside since about 1916, and that Dr. Barnard 

 had already found some in Ovamboland in 1923. 



