CHLOROPHYCE^ 



129 



wall is formed, as a rule, at the curve and not at the 

 base. In V. synandra several occur together on what 

 has been called an " androphore," while in V. de 

 Baryana and V. piloboloides the antherozoids escape 

 by lateral openings in the antheridium. There is, 



FIG. 34. Vaucheria synandra. n, ti lament with oogonia and antheridia ; 

 b, oogonium with antheridia; c, later stage of same; rf, escape of zoospore. 

 Highly magnified. (After Woronin.) 



in fact, considerable variety, of use in classification, 

 in the forms of the antheridia. The contents have 

 very little colouring matter, and break up into a 

 large number of small, biciliated antherozoids with 

 the cilia pointing in opposite directions, which escape 



K 



