1930 326 p., one folding chart, some text figures, 24 plates with explanatory text leaves, paperbound (original printed covers).Three papers (in the Landesanstalt's Abhandlungen, Neue Folge 122) on the fauna of the Lower Carboniferous. The paper by Schmidt has 20 text figures and three plates, the one by Kühne, on Gastropoda has five plates, the Brachiopoda by Paeckelmann 16 plates. A tiny stamp on the title page (Nicolaus), and some wear on spine, else a good clean copy. Scarce.