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Fig. 3. The measuring and sampling points in Nagy Vrzes-barlang, and the summer distribution of the most common species (e.g. Navicula contenta and Scotiella levicostaia were found at full length of the cave). Dotted line shows the 100 m height above sea level. Longitudinal section (N-S) of the cave - the lowest points represents the actual water level. (Redrawn from Kérdd et al. 1975) i Fig. 5. The measuring and sampling points in the Kis Vizes- barlang. Dotted line shows the 100 m height above sea level. Longitudinal section (N-S) of the cave - the lowest points represents the actual water level. (Redrawn from Kérdő et al. 1975)