Nos. 451-452.] STUDIES ON THE PLANT CELL. 



which He at a considerable distance from the structure (Fig. lo <^). 

 The latter cannot then be said to occupy the position of centro- 

 somes in relation to this spindle. Meanwhile important changes, 

 which are best known for Zamia, take place in the blcpharoplast. 

 In this type the structure forms a hollow sphere which breaks 

 up mto segments and finally mto granules as mitosis pioc lacIs.- 

 The radiations disappear without holding any appaicnt u Lition 

 to the spindle. During telophase each ol the two blcphai>>pKists 



tiated. At the close of the mitosis the blcphan^plast enters 



band which is to lie as a spiral around the sperm. I he granules 

 first extend as a delicate deeply stained line towards the nucleus 

 and then in the opposite direction. 1 he nucleus in Cycas puts 

 forth a papilla (Fig. lOc) which meets this line of granules and 

 remains attached to it tor some time. The line thickens into a 



