90 



PLAGIOGRAMMA ( Jrev. 

 P. Gregorianum R.K.E. 



Queens : Arverne, Edwards. 

 FRAGILARIA Lyngb. 

 F. capucina Desmaz. 



Common throughout the island. 

 F. Pacifica Griin. 



Queens: Arverne, Edwards. 



SYNEDRA Ehrb. 

 S. affinis Kiitz, 



Not infrequent along the coasts. 

 S. fulgens (Kiitz. ) W. Sin. 



Suffolk: Shelter Island. 

 S. pulchella Kiitz. 



Common throughout the island. 

 S. longissima W. Sm. 



Brooklyn Water Water Supply. 

 S. lanceolata Kiitz. 



Kings : Prospect Park. 

 S. Ulna (Nitzsch) Ehrb. 



Frequent throughout the island. 



ASTERIONELLA Hass. 

 A. formosa (Hass. ) Fr. 



Frequent throughout the island. 



EUNOTIA Ehrb. 



E. lunaris (Ehrb. ) Griin. 



Frequent throughout the island. 

 E. major (W. Sin.) Rab. 



Kings : Coney Island, Woodman. 

 E. monodon Ehrb. 



Queens : Arverne, Edwards. 

 E. tridentula Ehrb. 



Brooklyn Water Supply. 



ACHNANTHES Boiy. 

 A. brevipes Ag. 



Kings : Bay Ridge. 

 A. longipes Ag. 



Kings : Bay Ridge. 

 A. subsessilis Ehrb. 



Ki/igs : Bay Ridge. Queens : Arverne, Edwards. 



COCCONEIS Ehrb. 

 C. Pediculus Ehrb. 



Frequent throughout the island. 



