No. 3-] UTERUS AND EMBRYO. 387 
irregular and distorted. Finally it is to be added that not in- 
_ frequently the cells form a distinct epithelioid layer upon the 
surface of the amnion next the chorion, as represented in Cut 8, 
'B; a. 
Cut ro.— Mesodermic nuclei of the amnion of an embryo of about four months. 
X 713 diam. 
The epithelium of the amnion varies in appearance, as seen in 
transverse sections. Usually the cells are cuboidal or low cyl- 
Cut 11. — Surface view of the amniotic epithelium of an embryo of 144 days; 
stained with alum — hzematoxyline, and eogine. £/, protoplasm; #7, intercellular pro- 
cesses; 2, nucleus. X 1225 diams. 
