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:
Entwicklungsgeschichtliche untersuchungen Tafel XXI . Fig Fiq II Fig Fig L' Fiq Fiq st Fiq Tafel XXI Illustration Atlas biodiversitylibrary org title Vejdovsk Frantisek Biodiversity Heritage Library Entwicklungsgeschichtliche untersuchungen atlas Embryology Oligochaeta Worms Harvard University MCZ Ernst Mayr Library