. Fig. 50. (Nat. Grösse für 1/0 ccm.) *) Hensen, Planktonwcrk S. 17 und Taf. I Fig. 2. Tier- und Pflanzenwelt des Süsswassers. II. 18

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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectfreshwaterbiology