This collection of first edition, folio shell engraving is from Niccolo Gualtieri's "Index testarum conchyliorum quae adservantur in museo Nicolai Gualtieri". The work was published in Florence by C. Albizzini in 1742. The plates were engraved by Antonio Pazzi & Giuseppe Menabuoni.
These are extremely rare prints and becoming hard to find. They are very impressive.