21 



B. laevis Ehrb. 



Kings : Bay Ridge. 

 B. pulchella Gray. 



Queens : Arverne, Edwards. Suffolk : Shelter Island. 

 B. Rhombus (Ehrb.) W. Sm. 



Queens : Arverne, Edwards. 

 B. turgida W. Sm. 



Queens: Arverne, Edwards. 



B. Smithii | Kalis - 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 Rails. 



Queens : An'erne, Edwards. 



RHABDONEMA Ehrb. 

 R. Adriaticum Kiitz. 



Not infrequent throughout the coast. 



R. arcuatum Ag.) Kiitz. 



Queens : Arverne, Edwards. 



STRIATELLA Ag. 



S. interrupta (Ehrb.) Heiberg. 



Brooklyn Water Supply. 



TABELLARIA Ehrb. 

 T. fene strata Kiitz. 



Frequent throughout the island. Freshwater. 

 T. flocculosa (Roth) Kiitz. 



Frequent throughout the island. 



GRAMMATOPHORA Ehrb. 

 G. marina Kiitz. 



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

 Shelter Island. 



MERIDION Ag. 



M. circulare Ag. Fr. 



Brooklyn Water Supply. 

 DIATOMA DC. 



D. hiemale iLyngb.) Heiberg. 



Queens : Glencove, Oyster Bay, Fossil, Ries. 



