XIX 144 



Eupodiscus radiatus Ehr. 



— Ralfsii W. Smith 



— subtilis Greg. 



— tesselatus Roper 

 Fragilaria Lyngb. 

 Fragilaria arctica Grün. 



— capucina Desm. 



— crotonensis (A. M. Edw.) 



— cylindrus Grün. 



— islandica Grün. 



— oceanica Cleve 



— oceanica f. circularis Gran 



f. convoluta n. f. 



f. torta n. f. 



— striatula Lyngb. 

 Gallionella sulcata Ehr. 

 Glyphodesmis distans (Greg.) 



— Williamsonii (W. Smith) 

 Gomphonema exiguum Kütz v. pachy 



clada Br£b. 



— groenlandicum Oestr. 



— kamtschaticum v. groenlandica Cleve 126 

 Grammatophora islandica Ehr. 



— oceanica Ehr. 



— serpentina Ehr. 

 Grammonema striatulum Ag. 

 Guinardia Perag. 

 Guinardia baltica Schutt 



— Blavyana Perag. 



— flaccida (Castr.) 

 Gyrosigma balticum Cleve 127 



— fasciola Cleve 127 



— fasciola v. tenuirostris Cleve 127 



— tenuissimum Cleve 127 

 Halionyx splendens Ehr. 43 

 Hemiaulus Ehr. 99 

 Hemiaulus Hauckii Grün. 100 

 Hemidiscus cuneiformis Wallich 45 

 Henseniella baltica Schutt 24 

 Hyalodiscus Ehr. 26 

 Hyalodiscus scoticus (Kütz.) 26 



— stelliger Bau. 26 



— subtilis Bail. 26 

 Lauderia Cleve 22 

 Lauderia annulata Cleve 23 



— borealis Gran 23 



— confervacea Cleve 22 



— delicatula Schröder 22 



— fragilis Gran 21 



— glacialis (Grün.) 23 



— Schröderi P. Bergon 22 

 Leptocylindrus Cleve 24 

 Leptocylindrus danicus Cleve 24 



— danicus Schürt 49 

 Libellus septentrionalis Oestr. 124 



— kryokonites Cleve v. semiperfecta 



Cleve 126 



— membranacea Cleve 123 



— Oestrupi Cleve 126 



— pediculus Cleve 126 



— pelagica Cleve 125 



— septentrionalis Cleve 124 



— septentrionalis (Grün.) 124 



— solitaria Cleve 126 



— subinflata Grün. 126 



— vaga Cleve 126 



— valida Cleve & Grün. 126 



— Vanhöffenii Gran 124 



— Weißflogii Grün. 126 

 Nitzschia Hassal 128 

 Nitzschia acus Cleve 130 



— angularis W. Smith 130 



— arctica Cleve 130 



— bilobata W. Smith 130 



— Brebissonii v. borealis Grün. 130 



— Closterium W. Sm. 129 



— delicatissima Cleve 130 



— diaphana Cleve 130 



— distans v. erratica Cleve 130 



— fraudulenta Cleve 129 



