Editor: Editorial Assistant Associate Editor:

Acta Protozoologica is intended as a journal serving for the publication of original papers embodying the results of experimental or theoretical research in all fields of protozoology with the exception of purely clinical reports. The papers must be concise and will not be accepted if they have been previously published elsewhere. After acceptance by the Editors papers will be printed in the order as they have been received, in the possibly shortest time. Papers are accepted in English, French, German and Russian. Every paper should begin with the name and postal address of the laboratory, name and the surname of the author and title in the language of the text. The paper should accompanied by a summary in the language of the text, not exceeding 100 words, also with the translation into one of 4 languages accepted in the Journal. The authors speaking English, French, German, or Russian should translate the title and the summary into another one of the 4 languages accepted in the Journal. In the Russian texts also the name and the postal address of the laboratory, legends of tables, plates and text-illustrations must be translated, the translation of the summary may be somewhat more exten-sive, and the name of the author should be given additionally also in the Latin characters. Manuscript should be a doublespaced typescript (30 lines on one side of a sheet) with a norma