www.specimenshells.net SPECIMEN SHELLS DIALIDAE Cerithidium cerithinum Cerithidium cerithinum 23.5mm Cerithidium cerithinum 21mm Cerithidium cerithinum 25mm Cerithidium cerithinum 23mm		Cerithidium cerithinum 23.5 mm - F+ 21 mm - F+ 25 mm - F+ 23 mm - F+