www.specimenshells.net SPECIMEN SHELLS CASSIDAE Semicassis (Semicassis) bisulcata Semicassis (Semicassis) bisulcata 55mm Semicassis (Semicassis) bisulcata 54mm Semicassis (Semicassis) bisulcata 54mm Semicassis (Semicassis) bisulcata 51mm		Semicassis (Semicassis) bisulcata 55 mm - F++/Gem 54 mm - F++/Gem 54 mm - F++/Gem 51 mm - F++/Gem