1902-1923 Four Parts (complete for the Madreporaria). iv, vi, vi, vi, 148 p., 9 figs, 5, 10 pls (lithographs & heliotypes), roy. 4to, paperbound (first 2 parts without covers, last two parts with original printed covers, covers loose and chipped). One page with repaired tear. Small round blind-stamp on lower margin title-pages.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.