PHYTOPLANKTON 

 ALGAE 



Diatoms 



Peridinium 



Chlorella 



Ceratium 



1 — 'i-- \-- S- ' ^- v.^ 



Filamentous Algae 



Chlamydobotrys 



Figure 1. — Some typical forms of phytoplankton (greatly magnified): Peridinum and Ceratium (dinoflagel- 

 lates), Chlorella (chlorococcales), Chlamydobatrys (volvocales). 



