THE CELL. 



27 



some divides, the daughter centrosomes separate and wander to 

 opposite sides of the nucleus. Radiating lines, known as mantle 

 fibres, appear and extend from each centrusume to the chromo- 

 somes. 



Fig. 6. Fig. 7. 



Fly. tj. — Ct^ll in r^stinft stage, 

 Fi^'. 7. — Pl'opliasu slliiwing division nf c'-ntrosomi.-. 



B. Mctapliasc. During this stage the chromosomes are 

 split or cleaved longtitudinally into daughter chromosomes 

 apparently by the traction of the mantle fibres of the centro- 

 somes. 



Fiff 9. 

 Fig. S. '"^■ 



PI, 8.— Prophase showing separation of centrosomes. 



Fig. 9- — Metaphase. 



