100 ETHEL BROWXE HARYI \ 



EXPLANATION OF PLATE I. 



Fig. i from the sperm duct of Nolonecla shooterii; Fig. 8 from oogonial cell of 

 N. indica, other figures from follicle cells of N. indica. 



FIG. i. Binucleate cells from sperm duct of N. shooterii, resting stage. 



FIG. 2. Upper cell, prophase. Lower cell, metaphase showing a perfect double 

 chromosome group, 52 chromosomes. 



FIG. 3. Prophase. 



FIG. 4. Late prophase. 



FIG. 5. Metaphase, polar view, two plates separate. 



FIG. 6. Metaphase, side view, two plates separate. 



FIG. 7. Metaphase, two spindles in different planes. 



FIG. 8. Metaphase of oogonial cell of N. indica, showing 26 chromosomes. 



FIG. 9. Anaphase. 



FIG. 10. Telophase. 



FIG. ii. Lower cell, telophase, sister plates dividing into two. Upper cell 

 one nucleus in prophase, one in metaphase. 



FIG. 12. Late telophase showing two daughter binuclcate cells. 



