21 



B. laevis Ehrb. 



Kings : Bay Ridge. 

 B. pulchella Gray, 



Queens : Arverne, Edwards. Suffolk : Shelter Island. 

 B. Rhombus (Ehrb.) W. Sm. 



Qiceejis : xA.rverne, Edwards. 

 B. turgida W. Sm. 



Queens: Arverne, Edwards. 

 B. Smithii (Ralfs) V. H. 



Queens : Arverne, Edwards. 



ISTHMIA Ag. 

 I. enervis Ehrb. 



Queens : Arverne, Edwards. 



EUNOTOGRAMMA Weisse. 

 E. Amphioxys Ehrb. 



Queens: Arverne, Edwards. 



TERPSINOE Ehrb. 

 T. Americana Ralfs. 



Queens : Arverne, Edwards. 



RHABDONEMA Ehrb. 

 R. Adriaticum Kiitz. 



Not infrequent throughout the coast. 

 R. arcuatum (Ag. ) Kiltz. 



Queens : Arverne, Edwards. 



STRIATELLA Ag. 



S. interrupta (Ehrb.) Heiberg. 

 Brooklyn Water Supply. 



TABELLARIA Ehrb. 

 T. fenestrata Klitz. 



Frequent throughout the island. Freshwater. 

 T, flocculosa (Roth) Klitz. 



Frequent throughout the island. 



GRAMMATOPHORA Ehrb. 

 G. marina Klitz, 



Kings: Bay Ridge. Queens: Arverne, Edwards. Suffolk 

 Shelter Island. 



MERIDION Ag. 

 M. circulare Ag. Fr. 



Brooklyn Water Supply. 



DIATOMA DC. 



D. hiemale (Lyngb.) Heiberg. 



Queens : Glencove, Oyster Bay, Fossil, Ries. 



