Trochi, Turbines, Neritae Helices, from 'Neues Systematisches Conchylien-Cabinet', 1784, Vogel; Author: Friedrich Heinrich Wilhelm Martini; Author: Johann Hieronymus Chemnitz, German, active 18th century, 10 5/16 x 8 1/16 in. (26.19 x 20.48 cm) (plat