FIG. 5. 



PLATE I. 



FIG. 6. 



FIG. 8. 



FIG. 9. 



Semidiagrammatic representation of the processes of cell and nuclear division in Ascaris 

 megalocephala. (After Kostauecki.) 



FIG. 5. Besting cell. 



FIG. 6. Division of ceutrosome. 



FIG. 7. Prophase centrosomes at the poles; radiation well developed ; chromatin net- 

 work broken up into four chromosomes. 



FIG. 8. Mother star stage (monaster) ; chromosomes arranged at the equator. 



FIG. 9. Metaphase ; the longitudinally divided chromatiu filaments moving toward 

 the poles. 



FIG. 10. Anaphase; beginning of division of cell body. 



FIG. 11. Division of cell body almost completed; the central spindle shows the begin- 

 ning of the intermediate bodies. 



