144 PLANT LIFE OF ALABAMA. 



EUPODISCUS Ehrenb. 

 Eupodiscus radiatus Bailey. 



AULACODISCUS Ehrenb. 



Aulacodiscus argus (Ehrenb.) A. Schmidt. Tripodiscus argus Ehrenb. Eupodiscus 



argus Win. Smith. 

 Marine. 

 Tampa Bay (G. H. Taylor}. New Jersey. 



ACTINOCYCLUS Ehrenb. 

 Actinocyclus ehrenbergii Ralfs. 



Subfamily BIDDULPHIOIDEAE. 

 CHAETOCEROS Ehrenb. 



Chaetoceros varians (Lander) Van Heurck. Bacteriastrum varians Lander. /?. 

 curvatum Shadb. 



TRICERATITJM Ehrenb. 



Triceratium favus Ehrenb. 

 Salt or brackish water. 

 Tampa Bay (G. H. Taylor). New Jersey. 



Triceratium alternans Bailey. 

 Marine. 

 New Jersey. 



Triceratium punctatum Brightw. T. sculptum Shadb. 



AMPHITETRAS Ehrenb. 



Amphitetras antediluviana Ehrenb. 

 Marine. 

 Cosmopolitan. 



ODONTELLA Agh. 



Odontella aurita (Lyngb.) Agh. Diatoma auritum Lyngb. BiddulpMa aurita Br^bis. 

 Marine mud. 

 New Jersey. 



Odontella turgida (Wm. Smith) Van Heurck. Cerataulux turyidus Ehrenb. 

 Marine mud. 

 New Jersey. 



CERATAULUS Ehrenb. 

 Cerataulua smithii (Roper) Ralfs. 



TERPSINOE Ehrenb. 



Terpsinoe americana (Bailey) Ralfs. 



New Jersey. 

 Terpsinoe musica Ehrenb. 



Tampa Bay. New Jersey. 



Subfamily FRAGILARIOTDEAE. 



ETTNOTIA Ehrenb. 

 Eunotia arcus Ehrenb. 

 Eunotia triodon Ehrenb. 



Fresh water. 



New Jersey. 



