Hood. 1–4Cymbopleura incerta var. spitsbergensis (6904, 6907, 6912) 5 Cymbopleura incertiformis (6905) 6 Cymbopleura oblongata (6907). 7–10 (11, 12?). Cymbopleura incertiformis var. linearis (6898, 6903, 6906, 6907, 6908) 13–23 Encyonopsis (Cymbopleura?) grunowii [= Cymbella naviculacea] (6899, 6904). Scale bar: 10 µm.