Roosevelt Wild Life Bulletin 



Plate 21. Plankton Algae of Palisades Park 



(All figures x 460) page 



Pi?. I Staurastrum Arctiscon var. glabrum 144 



Fig. 2 Staurastrum WoUeanum 144 



Figs. 3-4 Staurastrum hrasiliense var. Lundellii 145 



Fig. 5 Sphaerozosma Auhertianum var. Archerii 145 



