XIX 146 



Streptotheca Shrubs. 

 Streptotheca thamensis Shrubs. 

 Striatella unipünctata (Lyngb.) 

 Surirella fastuosa Ehr. 



— gemma Ehr. 



— lata W. Smith 



— striatula Turp. 

 Syndendrium diadema Ehr. 

 Synedra acus (Kütz.) v. delicatissima 



Grün. 



— affinis Kütz. 



— fulgens (Kütz.) 



— Gallionii (Bory) 



— Holsatiae Hensen 



— nitzschioides Grün. 



— pulchella Kütz. 



— thalassiothrix Cleve 



— ulna (Nitzsch.) 



— undulata (Bail) 

 Tabellaria fenestrata (Lyngb.) 



— flocculosa (Roth) 

 Thalassiosira Cleve 

 Thalassiosira baltica (Grün.) 



— bioculata (Grün.) 



— Cleve i Gran 



— condensata Cleve 



— decipiens (Grün.) 



— excentrica Cleve 



— gelatinosa Hensen 



— gravida Cleve 



