1942 74 p., 17 figs, paperbound. Published in: Zoologischer Jahrbücher. We added two more reprints of papers on freshwater Nemerteans by Stiasny-Wijnhoff.
1936 / 1937 xii, 214 , [4], 20 p., 90 figures, 16, 2 plates, roy. 4to, later black half cloth, marbled boards (original printed front covers bound in). Small paper labels with numbers laid on spine. Small round blind-stamp on lower margin title-page.From 1899 to 1900 the HMS "Siboga" explored the waters of the Dutch East Indies (now Indonesia), were an enormous collection of both shallow water and deep water organisms was gathered.
1936 [4], 78 p., 11 figs, 38 pls (mostly heliotypes, but also 2 col. lithographs), roy. 4to, hcloth (some wear, no label on spine). Library stamps (Naturalis, Leiden - discarded) and other library markings. Ex library Dr. J.M. van der Vlerk (with his signature).
1936 xii, 214 p., 90 figs, 16 pls, roy. 4to, paperbound. Good copy.