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, 



fig.4. The nesting cell Rg.5. Beginning Prophase F%6. Earlq Prophase 



Fig. 7 Prophase 



F7g. 8. End of Prophase F7g.9. Metaphase 



Fig.12 Beginning Telophase Flg.13. 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 



