??? ?? ???? ???? ??? ???? ??? ??? ?? ? ??? ??? ???????? ?? ??? ??? ???? ??? ????, ?? ??? ?? ???? ?????.??? ?? ???? ??? ?? ???? ?????, ? ?? ???? ??? ? ??? ???????.????? ??? ??? ??? ???, ?????? ?? ??? ??? ????. ??? ?? ?? ??, ?? ??, ?? ??? ??? ???? ?????. ??? ????? ?? ??????.Often, faintly coloured rings are observed just inside the principal bow. The