The Mechanistic Conception of Life 



9 



Fig. 3 



Fig. 4 



Fig. 5 



Figs. 3, 4, and 5. — Segmentation of the sea-urchin egg, resulting in the 

 formation of two cells (Fig. 5). The changes from Fig. 3 to Fig. 5 occur in about 

 one minute or less time. This segmentation occurs after fertilization or after the 

 chemical treatment of the egg described in the text. 



Fig. 6 



Figs. 6 and 7. 

 respectively. 



Fig. 7 

 -The sea-urchin egg divided into four and eight cells 



