/'///■/■|\\\ ^^ 



Mm 



I;;;-- ^ 



mU 



A B 



Diagram A. Centrosome and sphere in the 1st maturation of Crepidula: 1 and 2 

 prophase; 3 and 4 metaphase; 5 — 8 anaphase. 



Diagram B. Centrosome and sphere in the cleavage of Crepidula: 1 prophase; 

 2 and 3 metaphase; 4 anaphase; 5 telophase; 6 "rest"; 7 prophase. 



