144 PLANT LIFE OF ALABAMA. 
EUPODISCUS Ebrenb. 
Eupodiscus radiatus Bailey. 
AULACODISCUS Ehrenb. 
Aulacodiscus argus (Ehrenb.) A. Schmidt. Tripodiscus argus Ehrenb. Eupodiscus 
argus Wm. Smith. 
Marine. 
Tampa Bay (G. H. Taylor). New Jersey. 
ACTINOCYCLUS Ebhrenb. 
Actinocyclus ehrenbergii Ralfs. 
Subfamily BIDDULPHIOIDEAE. 
CHAETOCEROS Ebrenb. 
Chaetoceros varians (Lauder) Van Heurck. Bacteriastrum varians Lauder, 2. 
curvatum Shadb. 
TRICERATIUM Ehrenb. 
Triceratium favus Ehrenb. 
Salt or brackish water. 
Tampa Bay (G. H. Taylor). New Jersey. 
Triceratium alternans Bailey. 
Marine. 
New Jersey. 
Triceratium punctatum Brightw. 7. sculptum Shadb. 
AMPHITETRAS Ehrenb. 
Amphitetras antediluviana Ehrenb. 
Marine. 
Cosmopolitan. 
ODONTELLA Agh. 
Odontella aurita (Lyngb.) Agh. Diatoma auritum Lyngb. Biddulphia aurita Brébis. 
Marine mud, 
New Jersey. 
Odontella turgida (Wm. Smith) Van Heurck. Cerataulus turgidus Ehrenb, 
Marine mud. 
New Jersey. 
CERATAULUS Ehbrenb. 
Ceratauilus smithii (Roper) Ralfs. 
TERPSINOE Ehrenb. 
Terpsinoé americana (Bailey) Ralfs. 
New Jersey. 
Terpsinoé musica Ehrenb, 
Tampa Bay. New Jersey. 
Subfamily FRAGILARIOTDEAE. 
EUNOTIA Ebrenb. 
EBunotia arcus Ebrenb. 
Eunotia triodon Ehrenb, 
Fresh water. 
New Jersey. 
