﻿875.'] 
  On 
  the 
  Natural 
  History 
  of 
  Kerguelen's 
  Island. 
  501 
  

  

  The 
  limitation 
  of 
  the 
  canalicular 
  tissue 
  of 
  the 
  cord, 
  at 
  its 
  placental 
  attach- 
  

   ment, 
  is 
  quite 
  as 
  abrupt. 
  

  

  The 
  injection-fluid 
  cannot 
  be 
  made 
  to 
  pass 
  from 
  the 
  substance 
  of 
  the 
  

   cord 
  into 
  the 
  placenta, 
  for 
  it 
  is 
  arrested 
  by 
  a 
  firm 
  membrane 
  derived 
  from 
  

   the 
  chorion, 
  which 
  the 
  vessels 
  of 
  the 
  cord 
  penetrate, 
  and 
  between 
  two 
  

   layers 
  of 
  which 
  they 
  lie. 
  There 
  is 
  absolutely 
  no 
  connexion 
  between 
  the 
  

   nutritive 
  system 
  of 
  the 
  cord 
  and 
  that 
  of 
  the 
  placenta. 
  

  

  VI. 
  The 
  chief 
  factor 
  in 
  the 
  nutrition 
  of 
  the 
  cord 
  is 
  the 
  arrangement 
  of 
  

   capillaries 
  entering 
  it 
  from 
  the 
  foetus. 
  Trom 
  the 
  facts 
  observed 
  by 
  me 
  

   in 
  cases 
  of 
  extra-uterine 
  gestation, 
  it 
  is 
  likely, 
  however, 
  that 
  the 
  stomata 
  

   of 
  the 
  epithelial 
  surfaces 
  o£ 
  the 
  cord 
  play 
  an 
  important 
  part 
  in 
  its 
  

   nutrition. 
  

  

  The 
  liquor 
  amnii 
  contains 
  substances 
  which 
  are 
  very 
  suggestive 
  that 
  

   the 
  fluid 
  is 
  used 
  for 
  purposes 
  of 
  nutrition, 
  and 
  perhaps 
  for 
  the 
  nutrition 
  

   of 
  the 
  cord. 
  In 
  recent 
  cases 
  of 
  extra-uterine 
  foetation, 
  before 
  the 
  liquor 
  

   amnii 
  becomes 
  absorbed, 
  the 
  cord 
  remains 
  fresh 
  and 
  plump. 
  After 
  the 
  

   fluid 
  has 
  been 
  absorbed 
  the 
  cord 
  becomes 
  shrivelled 
  ; 
  but 
  it 
  still 
  retains 
  its 
  

   structural 
  characters, 
  minus 
  the 
  wandering 
  cells. 
  It 
  may 
  be, 
  therefore, 
  

   that 
  the 
  canalicular 
  nuclei 
  are 
  able 
  to 
  keep 
  the 
  cord 
  in 
  repair, 
  as 
  it 
  were, 
  

   by 
  the 
  matters 
  absorbed 
  from 
  the 
  liquor 
  amnii, 
  until 
  that 
  fluid 
  disappears 
  — 
  

   very 
  much 
  as 
  ivy 
  continues 
  to 
  live 
  after 
  its 
  connexion 
  with 
  its 
  root 
  has 
  

   been 
  severed. 
  Indeed 
  the 
  analogy 
  between 
  the 
  umbilical 
  cord 
  and 
  vege- 
  

   table 
  tissue 
  is, 
  as 
  I 
  hope 
  to 
  be 
  able 
  to 
  show 
  further, 
  a 
  very 
  close 
  one. 
  

  

  III. 
  " 
  First 
  Report 
  of 
  the 
  Naturalist 
  accompanying 
  the 
  Transit- 
  of- 
  

   Venus 
  Expedition 
  to 
  Kerguelen's 
  Island 
  in 
  1874."" 
  (Conclu- 
  

   sion.) 
  By 
  the 
  Rev. 
  A. 
  E. 
  Eaton. 
  Communicated 
  by 
  the 
  

   President. 
  Received 
  May 
  10_, 
  1875. 
  

  

  In 
  January 
  1875, 
  shortly 
  after 
  the 
  departure 
  of 
  the 
  American 
  Expe- 
  

   dition 
  from 
  Royal 
  Sound, 
  an 
  opportunity 
  occurred 
  of 
  visiting 
  another 
  part 
  

   of 
  Kerguelen's 
  Island. 
  To 
  relieve 
  the 
  ennui 
  of 
  his 
  officers 
  and 
  men, 
  

   who 
  by 
  that 
  time 
  were 
  thoroughly 
  tired 
  of 
  being 
  detained 
  without 
  any 
  

   definite 
  occupation 
  in 
  an 
  uninhabited 
  island, 
  Captain 
  Fairfax 
  ordered 
  the 
  

   'Volage' 
  to 
  leave 
  Observatory 
  Bay, 
  and 
  proceeded 
  to 
  "Swain's 
  Bay, 
  

   where 
  he 
  remained 
  three 
  weeks. 
  During 
  this 
  period 
  he 
  entertained 
  me 
  

   as 
  his 
  guest, 
  took 
  me 
  to 
  the 
  best 
  localities 
  in 
  the 
  bay 
  for 
  collecting, 
  and 
  

   rendered 
  me 
  every 
  assistance 
  that 
  lay 
  in 
  his 
  power. 
  The 
  Royal 
  Society 
  

   is 
  therefore 
  indebted 
  to 
  Captain 
  Fairfax 
  for 
  a 
  fine 
  series 
  of 
  Algsc 
  from 
  

   Swain's 
  Bay, 
  comprising 
  many 
  species 
  not 
  found 
  in 
  Observatory 
  Bay, 
  

   and 
  some 
  that 
  were 
  not 
  known 
  to 
  be 
  indigenous 
  to 
  the 
  island. 
  Most 
  

   of 
  these 
  are 
  described 
  in 
  the 
  e 
  Flora 
  Antarctica 
  ' 
  as 
  Falkland-Islands 
  

   species. 
  Captain 
  Fairfax 
  at 
  the 
  same 
  time 
  enabled 
  me 
  to 
  secure 
  the 
  

   skeleton 
  of 
  a 
  Globiocephalus, 
  which 
  was 
  found 
  dead 
  in 
  shallow 
  water 
  by 
  

   Mr. 
  Forrest 
  (Mids.). 
  Most 
  of 
  the 
  epidermis 
  had 
  been 
  removed 
  by 
  small 
  

  

  