Diatoms from North-East Greenland. 



253 



л и 



и 



ел 



Xavicula 



— anglica 



— Atomus circiil. . . . 



— bacilliformis 



— capitata 



— cincta 



— cocconeiformis . . . 



— contenta 



— dicephala 



— gibbula 



— — capitata . . . 



— Lagerstedtii 



— falaisensis 



— Gastrum 



— lanceolata 



— — tenella .... 



— lucidula 



— mutica f. Cohnii. . 



— — Goeppertiana 



— — ventricosa . . 



— nivalis 



— Heufleriana 



— Placentula 



— radiosa 



— rhyncocephala . . . 



— Rotæana 



— Seminulum 



— viridula slesvicens. 



Neidium 



— affin, gen. minor . 



— — longiceps . . 



— bisulcatum 



— decoratum ...... 



— Iridis 



Nitzscliia 



— Denticula . . . . 



— Hantzschiana 



— Nathorstii . . . 



10 



15 



11 



12 



101 

 102 

 103 



104 

 105 

 106 

 107 

 108 

 109 

 110 

 111 

 112 

 113 

 114 

 115 

 116 

 117 

 118 



119 

 120 

 121 

 122 

 123 

 124 



125 



126 

 127 



128 

 129 



(Nitzschia) Palea minuta. 



— — tenuir 



— thermal, intens. . . 



Pinniilai'ia 



appendiculata. . . . 



— borealis 



— Brébissonii dimin. 



— linearis carta .... 



— divergentissima . . 



— interrupta staur. . 



— lata 



— Legumen 



— leptosoma 



— mesogongjia 



— mesolepta angusta 



— microstauron . . . . 



— parva Lagerstedtii 



— staur. inferr. parva 



— subcapitata 



Stauroneis 



— anceps 



— javanica oblonga. 



— — triincata . . 



— obtusa 



— parvula 



— Phoenic. amphil. . 



Stephanodisciis 



— Astræa spinul. . . . 



Surirella 



— ovalis minuta. . . . 



— — ovata 



Synedra 



— radians 



Tabellai'ia 



— flocculosa. 



Total 



X 



^18 10 

 447438 



The above list shows, that the total number of freshwater forms 

 is 128, and of these there were previously known 



from W. Greenland 44 (34.1 "/o) 



— E. Greenland 74 (57.4 " o) 



— Franz-Josef Land 38 (29.5 ^^/o) 



