The spindle is constricted, as mitochondria and granules are pressed against 

 it. This precedes the appearance of the cleavage furrow. 'Bubbling' at the 

 polar surface of the cell, fd) Telophase. 22 minutes later than (a). Cleavage 

 nearly complete and the nuclear membrane has formed. The nucleus has 

 a reticular structure, with masses of chromatin and developing nucleoli 

 connected bv chronionemata. 



