458 



Annals of the South African Museum. 



C3. 





F IG . 4. Fo?i'oa; oospores. A, B, V. Roussehtii. A, from Ussangu. 



B, from Rietfontein. 



C, V. capensis, from the Cape Flats. 



D, V. capensis f . rhodesiensis, from Old N'gamo. 



E, V. amboensis. 



C and D show different stages of development. 



A, B, C 3 , D a , and D 4 are mature oospores with fully developed exospore. 



D 3 and D, are from the same coenobium. 



All figures x 600. 



