CHANGES IN THE NON-PREGNANT UTERUS 79 



Embryology. This classification, as will be seen later, is iden- 

 tical with that adopted by Heape x in describing the menstrual 



-V,.: 



FIG. 5. Section through wall of vagina (upper part) of monkey. 



a, epithelium ; &, sub-mucous layer; c, lymphatic gland; d, nerve; 

 e, Pacinian body ; /, fat cells. 



1 Heape, "The Menstruation of Semnopithecus," &c., Phil. Trans., B., 

 vol. clxxxv., 1894, and vol. clxxxviii., 1897. A similar classification has been 

 adopted by Minot (Human Embryology, 1892), who divides the menstrual 

 process into (1) Tumefaction ; (2) Menstruation ; and (3) Restoration of the 

 mucosa. 



