PLATE X. 

Avy SO MICRONS 
Figs. 78-83. Germination of oospore of B. elachistandria Wittrock. (After 
Pringsheim) 
Figs. 84-92. Development and germination of zoospores of B. varians 
Wittrock v. subsimplex (Wittrock) Hirn. 
Figs. 93-98. Development of bristle and first cell division of a germinated 
zoospore of B. setigera (Roth) Agardh. (After Pringsheim). 
Fig. 99. A young plant of B. setigera (Roth) Agardh showing manner of 
branching: a, Primary filament developed from zoospore. b, 
Branch of the first order. c, d, e, Branches of the second, third, 
and fourth order, respectively. (Modified from Pringsheim). 
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