Plate 49 



Fig. 1. Pediastrum duplex var. reticulatwn Lagerheim, x 333 



( after Smith ) 



Fig. 2. Pediastrum integrum var. scutum Raciborski, x 625 



Fig. 3. Pediastrum duplex var, rugulosum Raciborski, x 750 



Fig. 4. Pediastrum glanduliferum Bennett, x 1000 (redrawn 



from Bisley, ex West and Fritsch, courtesy Macmillan 

 Publishing Co. ) 



Fig. 5. Pediastrum sculptatum G. M. Smith, x 333 (after Smith) 



Figs. 6, 7. Pediastrum obtusum Lucks, x 590 



Fig. 8. Pediastrum muticum Kv^etzing, x 750 



Fig. 9. Pediastrum muticum var. crenuhtum Prescott, x 750 



[758] 



