Fig. 69. — Human Ovum, said to be from Fifteen to Eighteen Days Old. (Compare footnote, 



page 134.) 



The chorion has been opened and spread out to show the embryo and its adnexa. A/, Body-stalk containing 



the allantoic diverticulum. Am, Amnion surrounding the embryo. Vi, Yolk-sac. 



133 



