Prosobranchia–Dorderkiemen Schnecken from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally enhanced by rawpixel.
Prosobranchia–Dorderkiemen Schnecken from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally enhanced by rawpixel.