(1) Stationary ectoplasm and flowing endoplasm are involved in a mutual transformation process: thereia an exchange of ectoplasm and endoplasm in the form of protoplasmic streamlets crossing the borderline between the endoplasmic stream and the ectoplasmic tube.
(2) Relationships between radial contractions, streaming rates of endoplasm and streamlets between ectoplasm and endoplasm were analyzed.