This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Biologische Untersuchungen TAF. XIX . GUSTAF RETZIUS Weitere Beitrge zur Kenntnis der Spermien bkh unt xy Taf XIX Baianus balanoides Baianus balanus Pandalus borealis Palaemon Nephrops Galathea Ebalia Portunus Forficula Gez Retzlus Repr und Druck von Cederquists Graf Sthlr TAF XIX Illustration XV biodiversitylibrary