452 



Autials of the South African Museum. 



FIG. 2. T". Roussdetii, from Egypt. 



A, Asexual coenobium (somatic cells omitted). x 230. 



B, C, D, Somatic cells in surface view, x 1000. (B, stained with methylene 



blue ; C, with Delafield's haematoxylin.) 



E, Oospore (not fully mature). x 400. 



F, Portion of oospore wall more highly magnified. 



G, A male coenobium. x 170. 



