Plate II 



,,. V 



*^;^vS..y> -;' 



First segmentation division of Sea-urchin egg, from WILSON and LEAMING. 

 A, B, C, Prophases ; D, Metaphase ; E, early Anaphase ; F, late Anaphase, 

 chromosomes forming vesicles at the poles ; G, Telophase. D and G 

 are drawn on a larger scale than the others. 



