. Annales de biologie lacustre. Natural history; Freshwater animals; Freshwater plants; Lakes. 202 — chez les vieilles nymphes, les fourreaux antérieurs un peu obliques en dehors, les postérieurs situés dans l'axe du t\ ^ '. 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, bookdecade1910, booksubjectnaturalhistory, booky