Shell structures of the last whorl. lin: lamella inferior, lsc: lamella subcolumellaris, lsu: lamella superior, lun: lunella, ni: neck inflection, nr: neck ribs, pba: plica basalis, ppr: plica principalis, psa: anterior plica superior, psc: plica subclaustralis, psl: plica sulcalis, psu: plica superior.