1949-1953 26 issues in 26. Title page, 233 p., 30 plates, numerous text figures, in stapled parts as issued (not bound)Rare series of publications on Japanese molluscs, mostly - but not all - written by the Japanese malacologist Tadashige Habe (1916-2001). Most but not all deal with marine taxa. Many new species are introduced here, and many are well-figured. Issues 7 and 8 are combined, the title page and index were issued separately. A very good, complete set of volume 1.