Diatomeen. 



XIX 145 



Nitzschia frigida Grün. 129 



— hybrida Grün. 131 



— insignis Greg. 131 



— lanceolata W. Sm. 131 



— lineola Cleve 131 



— longissima (Br6b.) 131 



— migrans Cleve 131 



— Mitchelliana Greenl. 131 



— paradoxa Grün. 131 



— polaris Grün. 131 



— pungens Grün. v. atlantica Cleve 130 



— recta Hantzsch. 131 



— seriata Cleve 129 



— spatulata Breb. 131 

 Odontella aurita Ag. 105 



— turgida De Toni 102 

 Orthosira marina W. Smith 14 

 Paralia Heib. 14 

 Paralia marina Heib. 14 



— sulcata (Ehr.) 14 

 Pinnularia ambigua Cleve 127 



— quadratarea (A. Schm.) 127 



— semiinflata (Oestr.) v. decipiens 



(Cleve) 127 

 Plagiogramma staurophorum (Greg.) 120 



Planktoniella Schutt 44 



Planktoniella Sol (Wallich) 44 



Pleurosigma angulatum (Quek.) 127 



— balticum Ehr. 127 



— delicatulum W. Sm. 127 



— fasciola Ehr. 127 



— formosum W. Sm. 127 



— longum Cleve 127 



— naviculaceum Br£b. 127 



— Normanii Ralfs 127 



— rigidum W. Sm. 127 



— Stuxbergii Cleve & Grün. 127 



— tenuirostre Grün. 127 



— tenuissimum W. Sm. 127 

 Podosira glacialis Cleve 23 



— hormoides v. glacialis Grün. 23 



— maculata W. Smith 26 



— (?) subtilis Ostenf. 19 

 Podosphenia Lyngbyei Kütz. 121 

 Porosira glacialis Jörg. 23 

 Pyxilla baltica Grün. 53 



— baltica Hensen 24 



— Stephanos Hensen 49 

 Raphoneis amphiceros Ehr. 116 



— belgica Grün. 116 



— surirella (Ehr.) 116 

 Rhabdonema adriaticum Kütz. 121 



— arcuatum (Lyngb.) 121 



— minutum Kütz. 121 

 Rhizosolenia (Ehr.) Brightw. 46 



Rhizosolenia acuminata (Perag.) 50 

 f. debilis n. f. 50 



— alata Btw. 56 



— alata f. gracillima (Cleve) 56 



f. indica (Perag.) 56 



f. corpulenta Cleve 56 



f. curvirostris Gran 56 



v. truncata Gran 56 



— arafurensis Castr. 52 



— atlantica Perag. 52 



— Bergonii Perag. 51 



— calcar avis Schultze 54 



— Castracanei Cleve 24 



— Castracanei Perag. 51 



— cylindrus Cleve 49 



— cylindrus äff. Ostenf. 48 



— Debyana Gran 50 



— delicatula Cleve 48 



— delicatula Gran 48 



— delicatula Ostenf. 49 



— faeroeensis Ostenf. 48 



— flaccida Castr. 24 



— fragilissima Bergon 49 



— fragillima Bergon 49 



— gracillima Cleve 56 



— hebetata (Bail.) 55 



f. hiemalis Gran 55 



f. semispina (Hensen) 55 



— Hensenii Schutt 53 



— imbricata Btw. 52 



— indica Perag. 56 



— obtusa Hensen 56 



— robusta Norm. 50 



— semispina Hensen 55 



— setigera Brightw. 53 



— setigera V. Heurck 55 



— Shrubsolei Cleve 52 



— sigma Schutt 50 



— Stolterfothii Perag. 49 



— striata Grev. 52 



— styliformis Btw. 54 



— Temperei v. acuminata Perag. 50 

 Rhoicosigma arcticum Cleve 127 

 Roperia tesselata Grün. 42 

 Schizonema Grevillei Ag. 126 

 Scoliotropis latestriata Breb. 127 

 Skeletonema Grev. 15 

 Skeletonema costatum (Grev.) 15 



— mirabile Grün. 15 

 Spatangidium heptactis Breb. 45 

 Stauroneis Granu Jörg. 124 



— septentrionalis Grün. 124 

 Stephanopyxis Ehr. 14 

 Stephanopyxis turgida Ralfs 14 



— turris (Grev.) 14 



