THE CHORIONIC VILLI. 



847 



Fig. 202. — Isolated Terminal Branch of a 

 Villus from a Human Chorion of Twelve 

 Weeks. 



Fig. 203. — Villous Stem from a Human Pla- 



CENTA.OF THE FlFTH MoNTH. X 9 diams. 



Fig. 204. — Terminal Branches of a Villus from a 



Human Placenta at Full Term. 



The little spots indicate proliferation islands of the covering 



epithelium. Magnified. 



Fig. 205. — Portion of an Injected Vil- 

 lus from a Placenta of about Five 

 Months. X 2I ° diams. 



