EXPLANATION OF PLATES 



All drawings are of Endamoeha coH and were made with camera lucida from 

 preparations fixed in Schaudiun's fluid ami stained with iron haematoxylin. Mag- 

 nification, X 2500. 



PLATE 29 



Fig. 1. Mononucleate cyst mth nucleus in the prophase and the cytoplasm 

 filled with typical chromatoidal bodies. 



Fig. 2. Binucleate cyst with nuclei in the resting phase. 



Pig. 3. Binucleate cyst with nuclei in early prophase. 



Fig. 4. A later prophase with tlie chromatin leaving the nuclear membrane. 



Fig. 5. Prophase with the nuclear membrane entirely free from chromatin. 



Fig. 6. Prophase. 



Fig. 7. Late prophase with tlie spindle formed in one nucleus and not yet 

 begun in the other. Note evidence for splitting of the cliromosomes in lower 

 nucleus. 



Fig. 8. Anaphase. Note abundance of chromidial bodies in cytoplasm. 



Fig. 9. Same stage as that of figure 8. 



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