Figs 1-12 Diatoms from Lake Nojiri. Figs 1,2. Amphora sibirica Skv. & Meyer, 　Figs 3,4. A. delphinea var. minor Cleve, Fig. 5. Gomphonema brasiliense var. demerarae Grun., Fig. 6. Cymbella cymbiformis Agardh, 　Figs 7,8. C. silesiaca var. auerswaldii Meister, Figs 9,10. Gomphonema grovei M. Sch. var. grovei, Figs 11,12. Neidium ladogensis f. maior Foged
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