. Annales de biologie lacustre. Natural history; Freshwater animals; Freshwater plants; Lakes. Fia Fig. 2. Pour aller d'un côté à l'autre, la larve ne va pas directement de 1 à 4 en passant la tête par dessus l'abdomen; elle décrit un grand arc de cercle, revenant ainsi chaque fois dans sa position. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Station biologique d'Overmeire. Bruxelles : F. Vanbuggenhoudt

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnatural, bookyear1922