PLATE XIV 



Figs. 1-3. — Meiosis in the oocytes of the earthworm Allolobophora. 

 (From Foot and Strobell, 1905, smears shghtly pressed before fixation.) 

 Fig. I. Diakinesis. Fig. 2. Early metaphase. Fig. 3. Full 

 metaphase. Note terminal and interstitial chiasmata. 



Figs. 4 and 5. — Anaphase of the first division in Kniphofia X 2000 

 (From Moffett, 1932 a.) 



Fig. 4. Separation of bivalent with single interstitial chiasma. 

 Fig. 5. Separation of bivalent with two compensating chiasmata 

 leading to interlocking. 



Fig. 6. — First metaphase in Mecostethus grossus, (^. 11 bivalents 

 visible, A' chromosome off the plate. 5 long bivalents have one proximal 

 chiasma only, 3 more have also a distal chiasma to give a ring. x ca. 

 1200. (La Gour : 2B.D. — gentian-violet, section 30|jt, thick.) 



Fig. 7. — INIetaphase, anaphase and telophase of mitosis in the morula 

 of a white fish {Covegoniis clupeoides), showing the changing shape of 

 the spindle. (By kind permission of Dr. P. C. KoUer.) 



