. Die Süsswasserfauna Deutschlands : eine Exkursionsfauna. Freshwater animals; Aquatic animals. Fig. 23. Callidina papulosa (Thomps.) a Rüokenseite, Räderorgan ausgestreckt, b Sporen (nach. Fig. 24. Callidina mulii- spinosa (Thomps.). Rückenseite, kontrahiert (nach Thompson).. 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 Brauer, August, 1863-1917; Böhmig, Dr. Jena, G. Fischer

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