﻿(ESTROUS 
  CYCLE 
  IN 
  THE 
  COMMON 
  FERRET. 
  345 
  

  

  PLATE 
  19. 
  

  

  Fig. 
  1. 
  — 
  Transverse 
  section 
  showing 
  portion 
  of 
  uterine 
  nuicosa. 
  (Period 
  

   1.) 
  X 
  ca. 
  300. 
  

  

  Fig. 
  2. 
  — 
  Transverse 
  section 
  showing 
  portion 
  of 
  nterine 
  nuicosa. 
  (Period 
  

  

  III, 
  very 
  early 
  stage.) 
  X 
  ca. 
  300. 
  

  

  Fig. 
  3.— 
  Transverse 
  section 
  showing 
  portion 
  of 
  uterine 
  mucosa. 
  (Period 
  

   IV.) 
  X 
  ca. 
  300. 
  

  

  Fig. 
  4. 
  — 
  Transverse 
  section 
  showing 
  portion 
  of 
  uterine 
  mucosa. 
  (Period 
  

  

  IV, 
  advanced 
  stage.) 
  x 
  ca. 
  300. 
  

  

  PLATE 
  20. 
  

  

  Fig. 
  5. 
  — 
  Transverse 
  section 
  of 
  liorn 
  of 
  uterus. 
  (Period 
  II, 
  early 
  stage.) 
  

   X 
  ca. 
  50. 
  

  

  Fig. 
  6. 
  — 
  Transverse 
  section 
  of 
  horn 
  of 
  uterus. 
  (Period 
  HI, 
  advanced 
  

   stage.) 
  X 
  ca. 
  50. 
  

  

  I'iG. 
  7. 
  — 
  Transverse 
  section 
  of 
  body 
  of 
  uterus. 
  (Period 
  IV. 
  The 
  entire 
  

   section 
  is 
  not 
  shown.) 
  X 
  ca. 
  50. 
  

  

  Fig. 
  8. 
  — 
  Transverse 
  section 
  of 
  ovary, 
  showing 
  its 
  attacliment 
  to 
  the 
  wall 
  of 
  

   the 
  body 
  cavity, 
  and 
  its 
  enclosure 
  by 
  a 
  sac 
  into 
  which 
  tlie 
  ova 
  are 
  discharged. 
  

   X 
  ca. 
  li. 
  The 
  section 
  passes 
  six 
  times 
  across 
  the 
  coiled 
  Fallopian 
  tube. 
  

  

  PLATE 
  21. 
  

  

  Fig. 
  9. 
  — 
  Section 
  through 
  atretic 
  follicle. 
  x 
  ca. 
  300. 
  The 
  membrana 
  

   granulosa 
  lias 
  almost 
  coiiii)letely 
  disappeared, 
  while 
  the 
  ovum 
  is 
  much 
  shrunken 
  

   and 
  in 
  a 
  very 
  degenerate 
  condiUon. 
  Ingrowth 
  from 
  the 
  connective 
  tissue 
  

   wall 
  of 
  the 
  follicle 
  has 
  commenced, 
  but 
  has 
  not 
  advanced 
  very 
  far. 
  

  

  Fig. 
  10.— 
  Transverse 
  section 
  showing 
  portion 
  of 
  uterine 
  mucosa. 
  (Period 
  

   IV.) 
  X 
  ca. 
  300. 
  Large 
  numbers 
  of 
  blood 
  corpuscles 
  are 
  seen 
  extravasated 
  

   in 
  the 
  stroma, 
  while 
  at 
  the 
  same 
  time 
  new 
  (?) 
  blood-vessels 
  are 
  apparently 
  in 
  

   process 
  of 
  being 
  formed. 
  

  

  Fig. 
  11. 
  — 
  Transverse 
  section 
  showing 
  portions 
  of 
  uterine 
  mucosa, 
  as 
  well 
  

   as 
  products 
  of 
  denudation, 
  in 
  the 
  uterine 
  cavity. 
  (Period 
  III, 
  advanced 
  

   stage.) 
  X 
  ca. 
  300. 
  

  

  