CHANGES IN THE NON-PREGNANT UTERUS 79 



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

 tical with that adopted by Heape ^ in describing the menstrual 



.^J»iSi* .----;:• --.*»:•; •-" 



.'•■i':">%-:^?v?^:.i=7>"'"*^^^ ■■■■■■ v.-.-.'-fi.i 





'■...,..]j!#:.v\%;.si*'- ■ 



-<i 



-%.,^.-' 



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



a, epithelium ; 6, sub-mucous layer ; i;, lymphatic gland; d, nerve; 

 e, Pacinian body ; /, fat cells. 



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

 vol. olxxxv., 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. 



