PLAGIOGRAMMA Grev. 

 P. Gregorianum R.K.E. 



Queens : Arverne, Edwards. 



FRAGILARIA Lyngb. 

 F. capucina Desmaz. 



Common throughout the island. 

 F. Pacifica Grlin. 



Queens : Arverne, Edwards. 



SYNEDRA Ehrb. 

 S. affinis Kutz. 



Not infrequent along the coasts. 

 S. fulgens (Kiitz.) W. Sm. 



Suffolk : Shelter Island. 

 S. pulchella Kiitz. 



Common throughout the island. 

 S. longissima W. Sm. 



Brooklyn Water Water Supply. 

 S. lanceolata Ktitz. 



Kings : Prospect Park. 

 S. Ulna (Nitzscb) Ehrb. 



Frequent throughout the island, 



ASTERIONELLA Hass. 

 A. formosa (Hass.) Fr. 



Frequent throughout the island. 



EUNOTIA Ehi'b. 



E. lunaris (Ehrb.) Griin. 



Frequent throughout the island. 

 E. major (W. Sm.) Rab. 



Ki*igs : Coney Island, Woodman. 

 E. monodon Ehrb. 



Queeju : Arverne, Edwards. 

 E. tridentula Ehrb. 



Brooklyn Water Supply. 



ACHNANTHES Bory 

 A. brevipes Ag. 



Kings : Bay Ridge. 

 A. longipes Ag. 



Kings : Bay Ridge. 

 A. subsessilis Ehrb. 



Kings: Bay Ridge. Queens: Arverne, Edwards. 



COCCONEIS Ehrb. 

 C, Pediculus Ehrb. 



Frequent throughout the island. 



