PROTOCOCCACE/E 



PL. 17. 



* 



3. 

 'Nx-'. 



' 



5 



** 





<rr 



(5. a. 



1. (Pediastrum bidentulum. gr. 2. (Pediastrum, constrictum. Uass. 



8. CPeiiastrLt'n gracile. r. . (Pediastrum pertusum, Kutz. 



5. (P. pertusum v. clathratum I}r. 6. (P. pertusum v. brachylobum. 



