Stated “First Edition” to the copyright page of both. Both volumes as new and unread. Interiors are clean and unmarked. Pictorial boards are clean. Corners are sharp and square. Slipcase is in Near Fine Condition with very light shelfwear to show to matching pictorial coverings. Volume 1 – “Introduction, Scissurellidae”, complete with Thumb nail identification cards and replacement plate for pp.135 to the rear pocket. Volume 2 – “Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae” complete with Thumb nail identification cards to the rear pocket. This very heavy set (5kg) will require additional postage. An indispensable reference for marine biodiversity professionals and advanced shell collectors.