ZYGNEMACEAE. 



ZYGNEMA (Ag.) Do Bary. 

 Z. cruciatum Ag. 



Queens : Glen Cove. 



SPIROGYRA Link. 



S. varians (I lass. ) Kiitz. 



Ridgewood Water Supply. 

 S. nitida (Dill.) Link. 



Kings : Prospect Park. 

 S. longata (Vauch. ) Kiitz. 



Kings : Prospect Park. 

 S. setiformis (Roth) Kiitz. 



Kings : Prospect Park. 

 S. tenuissima Kiitz. 



Ridgewood Water Supply. 



ZYGOGONIUM Kiitz. 

 Z. pectinatum Kiitz. 



Queens : Cold Spring Harbor, Johnson. 



CHLOROPHYCEAE. 

 VOLVOCACEAE. 



CHLAMYDOMONAS Ehrb. 

 C. sp. indet. 



Common. 



SPHAERELLA Sommerf. 

 S. pluvialis (Ehrb.) Sommerf. 

 Common throughout. 



GONIUM Mill. 

 G. pectorale Mull. 



Frequent throughout the island. 



PANDORINA Bory. 



P. morum (Mull.) Bory. 



Kings : Prospect Park, Ridgewood Water Supply. Queens : Cold 

 Spring Harbor, Johnson. 



VOLVOX L. 

 V. globator L. 



Not infrequent, local. 



TETRASPORACEAE. 



TETRASPORA Link. 

 T. lubrica (Roth) Ag. 

 T. bullosa (Roth) Ag. 

 Frequent throughout. 



