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Biologische Untersuchungen TAF. XVIII . GUSTAF RETZIUS Weitere Beitrge zur Kenntnis der Spermien biol unt xy Asellus Taf XVIII Oniscus Myside Hyperia Mysis Gammarus JV Gez Retzius Repr und Druck von Cederquisls Sthln TAF XVIII Illustration XV biodiversitylibrary org title Frst Carl Magnus Retzius Gustaf