In a previous paper (8) an organized structure was described in the macronuclei of certain old organisms of Tokophrya infusionum. It was found that the same honeycomb structure appears in great abundance in the macronuclei of overfed organisms. This permitted a better three-dimensional reconstruction of the described structure.

Since the defined structure may be experimentally induced, it offers an opportunity for further more detailed studies as to its nature and meaning.

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