﻿(ESTEOUS 
  CYCLE 
  IN 
  THE 
  COMMON 
  EEUEET. 
  323 
  

  

  The 
  CEstrous 
  Cycle 
  in 
  the 
  Common 
  Ferret. 
  

  

  By 
  

   Francis 
  H. 
  A. 
  Marshall, 
  D.Sc. 
  

  

  With 
  Plates 
  19—21. 
  

  

  " 
  (Estrus 
  vocatur 
  hoc 
  malum." 
  — 
  Pliny. 
  

  

  Contents. 
  

  

  PAGE 
  

  

  1. 
  Introductory 
  ...... 
  323 
  

  

  2. 
  The 
  CEstrous 
  Cycle 
  . 
  . 
  . 
  . 
  . 
  .324 
  

  

  3. 
  Ovulation 
  . 
  ..... 
  328 
  

  

  4. 
  Note 
  on 
  the 
  Anatomy 
  of 
  the 
  Internal 
  Genital 
  Organs 
  . 
  330 
  

  

  5. 
  The 
  Histology 
  of 
  the 
  Uterus 
  during 
  the 
  (Estrous 
  Cycle 
  . 
  330 
  

  

  6. 
  Summary 
  and 
  Concluding 
  Remarks 
  .... 
  337 
  

  

  7. 
  References 
  to 
  Literature 
  ..... 
  342 
  

  

  8. 
  Description 
  of 
  the 
  Plates 
  ... 
  . 
  344 
  

  

  Introductory. 
  

  

  The 
  investigations 
  which 
  form 
  the 
  subject 
  of 
  the 
  present 
  

   paper 
  were 
  commenced 
  in 
  the 
  summer 
  of 
  1901^ 
  and 
  were 
  carried 
  

   on 
  at 
  the 
  University 
  of 
  Edinburgh 
  in 
  connection 
  with 
  the 
  

   Zoological 
  Department. 
  A 
  preliminary 
  account 
  has 
  already 
  

   been 
  published, 
  being 
  included 
  in 
  the 
  memoir 
  on 
  ' 
  The 
  (Estrous 
  

   Cycle 
  and 
  the 
  Formation 
  of 
  the 
  Corpus 
  Luteum 
  in 
  the 
  Sheep 
  ' 
  

   (Marshall, 
  1903). 
  

  

  Through 
  the 
  courtesy 
  of 
  Professor 
  Schafer 
  I 
  was 
  permitted 
  

   to 
  make 
  use 
  of 
  the 
  resources 
  of 
  the 
  Physiological 
  Department 
  

   for 
  keeping 
  the 
  ferrets 
  used 
  in 
  the 
  research. 
  Both 
  " 
  polecat 
  

  

  