Mating types in paramecium -- General description of the protista and of paramecium -- Methods of studying genetic processes in organisms of the paramecium Aurelia species group -- The determination of mating types in paramecium -- Symbionts and mitochondria of paramecium -- Determination of i-antigens -- Micronuclei and macronuclei -- Ribosomal RNA and DNA -- Cortical morphogenesis -- Behavior -- Epigenetics.