164 Roosevelt Wild Life Bulletin 



Plate 9. Pi.A>-KTO>- AiGAE OF Palisades Park 



f All figures x 460) page 



Figs. 1-2 Micractinium pusiUum 141 



Figs. 3-4 Errerella hornhemiensis " 137, 141 



Figs. 5-7 Pachycladon umhrinus 137, 141 



