PLATE 25 



Prasiola delicata S. and G. 



Fig. 1. A mierophotograph of a marginal segment, surface view showing 

 the arrangement of the vegetative cells. X 442. 



Prasiola meridionalis S. and G. 



Fig. 2. A mierophotograph of a portion of the surface, showing vegetative 

 cells and interspersed aplanospores (?). X 442. 



[312] 



