PLATE X. 
Fig 13. Section of the Villi and Edge of the Chorion. Photograph, x 140 d. 
The section demonstrates that the villi are covered by a double-layered epithelium 
(cellular layer and plasmodial layer). 
Fig. 14. Section of a Single Villus and Mass of Langhans’ Later Cells, more highly 
magnified than in the last figure. Photograph, x 240 d. 
The two-layered epithelium covering the mesoblastic core of the villus is well seen. 
The mass of Langhans’ layer cells is covered by a very distinct plasmodial layer 
(syncytium of authors). 
