Polynova Galina V. RussiaMoscowPeoples' Friendship University of Russia named after Patrice Lumumba, 6 Miklukho-Maklaya St., Moscow 117198, Russiagalinapolynova@mail.ru Author's articles Foster’s or island rule in populations of Phrynocephalus mystaceus and Eremias velox (Reptilia, Lacertilia) on the sandy massif Sarykum