J. THOMAS PATTERSON. 



PLATE II. 



FIG. 6. Transverse section taken through the region of the tip of the uterus. 

 X 381. 



FIG. 7. Two ova that are beginning to be surrounded by vitelline cells pre- 

 paratory to the formation of a capsiile. X 784. 



FIG. 8. The two-celled stage, showing a micromere and a macromere. X 740. 



