EN
The paper contains descriptions of three species of cestodes from three species of penguins on King George Island: Parorchites zederi (Baird, 1853) in Pygoscelis papua, P. antarctica and P. adeliae, Tetrabothrius pauliani Joyeux et Baer, 1954 in P. antarctica and P. adeliae and T. joubini Railliet et Henry, 1912 in P. antarctica. Tetrabothrius pauliani is recorded for the first time in the South Shetlands, and P. adeliae is a new host record of this parasite. A description is given of P. zederi cercoids found in seal intestine. The question of the geographical distribution of the species under study is discussed, as well as the problem of the life cycle of P. zederi.