﻿OF 
  THE 
  PYTHON. 
  129 
  

  

  divides 
  into 
  two 
  bronchiae, 
  appropriated 
  to 
  the 
  two 
  lungs. 
  The 
  lungs, 
  

   in 
  a 
  collapsed 
  state, 
  lie 
  much 
  concealed, 
  being 
  covered 
  in 
  part 
  by 
  the 
  

   liver 
  ; 
  but, 
  when 
  inflated, 
  are 
  brought 
  into 
  view, 
  and 
  cause 
  the 
  liver 
  to 
  be 
  

   raised 
  up. 
  These 
  organs 
  consist 
  in 
  two 
  distinct 
  vesicles 
  or 
  bags, 
  united 
  

   above 
  along 
  their 
  middle, 
  but 
  terminating 
  below, 
  each 
  in 
  a 
  separate 
  cul 
  

   de 
  sac. 
  They 
  differ 
  materially 
  in 
  size, 
  but 
  vary 
  less 
  in 
  this 
  respect 
  than 
  

   those 
  of 
  snakes 
  in 
  general. 
  The 
  right 
  lung 
  is 
  two 
  feet 
  ten 
  inches 
  long, 
  

   and 
  about 
  four 
  inches 
  broad, 
  and 
  extends 
  down 
  as 
  far 
  as 
  the 
  gall 
  blad- 
  

   der; 
  opposite 
  the 
  spleens, 
  which 
  are 
  on 
  its 
  left, 
  it 
  has 
  a 
  considerable 
  

   contraction 
  of 
  its 
  diameter. 
  The 
  smaller 
  vesicle 
  lies 
  on 
  the 
  left 
  side, 
  

   and 
  is 
  loose 
  at 
  its 
  lower 
  end 
  ; 
  it 
  is 
  only 
  one 
  foot 
  nine 
  inches 
  long, 
  and 
  

   three 
  inches 
  broad 
  ; 
  it 
  terminates 
  near 
  the 
  lower 
  extremity 
  of 
  the 
  liver. 
  

   The 
  lower 
  four-fifths 
  of 
  each 
  lung 
  are 
  thin, 
  semi-transparent, 
  and 
  sup- 
  

   plied 
  with 
  fewer 
  blood 
  vessels 
  than 
  the 
  upper 
  portion. 
  The 
  parietes 
  

   are 
  marked 
  by 
  circular 
  lines 
  or 
  striae, 
  along 
  which 
  are 
  strung 
  small 
  

   white 
  bodies, 
  apparently 
  vesicular, 
  from 
  half 
  a 
  line 
  to 
  two 
  lines 
  distant 
  

   from 
  each 
  other; 
  they 
  are 
  much 
  more 
  numerous 
  above, 
  and 
  appear 
  to 
  

   be 
  merely 
  attached 
  to 
  the 
  inner 
  surface. 
  The 
  upper 
  portion 
  of 
  each 
  

   lung 
  is 
  composed 
  of 
  a 
  more 
  spongy 
  structure 
  ; 
  the 
  parietes 
  are 
  much 
  

   thicker, 
  and 
  present 
  on 
  their 
  inner 
  surface 
  a 
  loose 
  reticulated 
  texture, 
  

   somewhat 
  resembling 
  a 
  section 
  of 
  the 
  corpus 
  cavernosum 
  penis, 
  the 
  

   cells, 
  however, 
  being 
  much 
  larger. 
  A 
  free 
  passage 
  is 
  left 
  through 
  the 
  

   centre, 
  so 
  that 
  the 
  air, 
  in 
  inspiration, 
  is 
  not 
  obliged 
  necessarily 
  to 
  pass 
  

   through 
  the 
  cells, 
  which 
  seem 
  to 
  present 
  merely 
  a 
  more 
  extensive 
  sur- 
  

   face 
  for 
  the 
  purposes 
  of 
  respiration. 
  Both 
  lungs 
  contained 
  many 
  

   worms, 
  found 
  most 
  abundant 
  above 
  among 
  the 
  cells, 
  and 
  even 
  in 
  the 
  

   trachea; 
  they 
  were 
  of 
  various 
  dimensions, 
  being 
  from 
  one 
  to 
  three 
  

   inches 
  in 
  length, 
  whitish, 
  cylindrical, 
  tapering, 
  and 
  surrounded 
  their 
  

   whole 
  length 
  by 
  elevated 
  rings 
  or 
  cords. 
  

  

  CIRCULATION. 
  

  

  The 
  heart 
  is 
  situated 
  about 
  two 
  feet 
  from 
  the 
  head, 
  on 
  the 
  middle 
  

   line 
  of 
  the 
  body 
  ; 
  it 
  was 
  flaccid, 
  and 
  contained 
  some 
  firm 
  coagula 
  ; 
  it 
  

   was 
  of 
  an 
  oblong 
  form, 
  and 
  about 
  four 
  inches 
  in 
  length. 
  The 
  two 
  

   auricles 
  constitute 
  the 
  upper 
  half, 
  and 
  are 
  distinct, 
  having 
  their 
  apices 
  

   entirely 
  separated 
  above. 
  The 
  right 
  auricle, 
  which 
  is 
  rather 
  smooth 
  

   vol. 
  v. 
  — 
  2 
  H 
  

  

  