Romanova Elena B. RussiaNizhny NovgorodLobachevsky State University of Nizhni Novgorod, 23 Gagarin Avenue, Nizhni Novgorod 603950, Russiaromanova@ibbm.unn.ru Author's articles Leukocyte blood composition of Naturix natrix (Serpentes: Colubridae) in the Mordovian State Nature Reserve (Russia) Comparative leukocyte blood profile of Emys orbicularis (Reptilia: Emydidae) from two populations Age differences in the leukocyte blood composition of the common viper Vipera berus (Reptilia: Serpentes: Viperidae) On the issue of sex differences in metric characters in Anguis colchica (Nordmann in Demidoff, 1840) (Anguidae, Reptilia) Adaptive blood reactions of Testudo graeca nikolskii Ckhikvadze et Tuniyev, 1986 (Testudinidae, Reptilia)