432 THE PHYSIOLOGY OF REPRODUCTION 



of the foetal body in an age-series of pregnant rabbits from the 

 fourteenth day to the end of pregnancy. The maternal placenta 



Jp 



e t> 



*,; 

 



& 







} 



a ,." 



" ^ f * 4 *e!\ ^v^ 



^5 



-^5" 



FIG. 104. Glycogenic areas of the rabbit's p'acenta at the twelfth day of 

 pregnancy. (Chipman.) 



fp, ftetal placenta, containing no glycogen ; ir, intermediary region ; re, 

 region of uterine sinuses ; ss, uterine sinuses with perhascular sheaths 

 of uninucleate cells rich in glycogen ; </, glycogen granules in multi- 

 nucleate cells; m, muscular wall immediately above which, at a later 

 date, the zone of separation, containing glycogenic decidual cells, is 

 differentiated. 



was separated mechanically from the foetal placenta, and each 

 was investigated separately. The maternal part includes the 

 two glycogenic areas, the region of the uterine sinuses and the 



