THE CARRIERS OF THE HERITAGE 19 



membrane and the more compact form of the chromo- 

 somes. At the end of the prophase (Fig. 8) the chro- 

 mosomes have come to lie at the equator of the cell, 



F7g.4. The nesting cell FJo,.5. Beginning Prophase fl.6. Earlij Prophase 



Fi. 7 Prophase F7. 8. End of Prophas* F?.9. Metaphase 



FiC> 10. Beginning Anaphaje 



Rg.ll. Anaphase 



R.I2 Beginning Telophase Ro,.l3. End of Telophase 

 FIGS. 4-13. Diagrams illustrating mitosis. After Boveri. 



being connected by the mantle fibers with the cen- 

 trosomes, each of which has now come to occupy a 

 polar position. In the metaphase (Fig. 9) the chromo- 

 somes split lengthwise, and at the beginning of the 



