Die geographische Verbreitung der Nacktschnecken. Eine zusammenfassende kritische Darstellung unserer Kenntnisse derselben zu Amfang des 20. Jahrhunderts

Pp. 92; 2 double-page maps of the world shaded in red to show distribution of slugs, 9 text-figures. Extract without wrappers, housed loose in early plain brown paper covers, lg 4to. Sonderabdruck aus den Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft, band 30, heft 1. This early work discusses the geographical distribution of land slugs, shell-less terrestrial gastropod mollusks. A copy of the front wrapper is laid in at front. This monograph is from the research library of herpetologist Kevin W. Marx with his signature on the front brown wrapper.