"Cerithium planispiratum (G.B. Sowerby II, 1855)" . . . . . . "Cerithium novaehiberniae (A. Adams, 1855)" . . . "Cerithium fenestratum (G.B. Sowerby II, 1855)" . . "Cerithium eburneum f. minor (M\u00F6rch, 1876)" . . "Cerithium eburneum aliceae (Petuch, 1987)" . . "Cerithium eburneum" . "Thericium lymani (Pilsbry, 1949)" . . . "Cerithium eburneum" . "Cerithium algicola (C.B. Adams, 1845)" . . . . . . . "Cerithium pulicarium (Philippi, 1848)" .