334 HARRY H. CHARLTON. 



PLATE II. 



FIG. 7. (72 hours.) Spindle fibers missing, chromosomes of spindle hugged 

 closely together. Several parts separated and out in the cytoplasm. 



FIG. 8. (72 hours.) A later stage of the above. Chromosomes scattered in 

 the cytoplasm. One showing the beginning of vesicle formation. Several phago- 

 cytes are present inside the zona. Cytoplasm near open end shows beginning of 

 disintegration. 



FIG. 9. (72 hours.) Completion of vesicle formation begun in Fig. 8. The 

 chromatic material clumped to one side of the vesicle. Quite a few small particles 

 of disintegrated cytoplasm may. be seen inside the zona indicating the activity 

 of the phagocytes. 



FIG. 10. (72 hours.) Reconstruction showing ring-like formation of nuclear 

 material. Possibly a succeeding stage to Fig. 6. A phagocyte cell is noticed just 

 outside the zona, which is very faintly stained. 



