PLATE XVI 



Figs. 1-3. — Diakinesis in Stenohothms lifieatus. (From Belar, 1927.) 

 Fig. I,. Living cells. Fig. 2. The same cells after fixation with 

 osmium tetroxide vapour and Flemming. Fig. 3. The same cells 

 after staining with Giemsa-Romanovsky. 



Figs. 4-7. — Photographs of living chromosomes of Melanoplus femur 

 ruhnmi (Orthoptera) at meiosis, taken b}^ ultra-violet light. (After Lucas 

 and Stark, 1931,) 



Fig. 4. Late telophase before meiosis. X 1800, Fig. 5. 

 Pachytene, x 1800. Fig. 6. First anaphase showing probable 

 dicentric bridge. X 1200. Fig. 7. First telophase. X 1200. 



