﻿156 
  H. 
  M. 
  WOODCOCK. 
  

  

  are 
  at 
  length 
  cut 
  off, 
  and 
  become 
  separate 
  inside 
  the 
  remains 
  

   of 
  the 
  cell. 
  According* 
  to 
  Smith 
  and 
  Johnson, 
  the 
  central 
  

   part 
  of 
  the 
  cytoplasm 
  of 
  the 
  mother-schizout 
  may 
  be 
  entirely 
  

   used 
  up 
  (" 
  resorbed 
  ") 
  by 
  the 
  daughter 
  ones, 
  as 
  in 
  Fig. 
  A 
  (6), 
  

   or 
  some 
  may 
  be 
  left 
  over 
  as 
  a 
  residual 
  body 
  frestiform 
  body] 
  . 
  

   In 
  Fig. 
  A 
  (6) 
  the 
  contents 
  of 
  each 
  separate 
  schizontocyte 
  

   [spore] 
  have 
  further 
  divided 
  up 
  into 
  a 
  great 
  uumber 
  of 
  

   merozoites 
  {in. 
  z.) 
  [sporozoites], 
  all 
  arranged 
  in 
  one 
  direction, 
  

   and 
  constituting, 
  indeed, 
  a 
  typical 
  merogonic 
  "bai-illet." 
  

   The 
  homogeneous-looking 
  masses 
  are 
  simply 
  deeply 
  stained 
  

   daughter-schizonts, 
  too 
  opaque 
  to 
  show 
  the 
  merozoites 
  inside. 
  

   It 
  will 
  be 
  observed 
  that 
  the 
  only 
  '' 
  membrane 
  " 
  holding 
  the 
  

   products 
  resulting 
  from 
  one 
  parasite 
  together 
  is 
  the 
  com- 
  

   pletely 
  atrophied 
  host-cell. 
  Fig. 
  A 
  (5 
  h) 
  shows 
  a 
  single 
  

   barillet 
  of 
  merozoites 
  liberated 
  from 
  a 
  fresh 
  kidney 
  ; 
  the 
  

   cluster 
  is 
  attached 
  to 
  a 
  small 
  secondary 
  residual 
  body 
  [r. 
  h.). 
  

   Onr 
  authors 
  state 
  that 
  the 
  membrane 
  surrounding 
  the 
  mero- 
  

   zoites 
  [i. 
  e. 
  the 
  spore-membrane] 
  is 
  usually 
  rounded, 
  but 
  of 
  

   no 
  definite 
  shape 
  and 
  quite 
  structureless, 
  and 
  in 
  optical 
  

   section 
  appeal's 
  only 
  as 
  a 
  sharp 
  line; 
  moreover, 
  it 
  is 
  easily 
  

   ruptured 
  on 
  pressure, 
  setting 
  free 
  the 
  enclosed 
  merozoites. 
  

   In 
  short, 
  it 
  doubtless 
  represents, 
  in 
  its 
  turn, 
  the 
  remains 
  of 
  

   the 
  schizontocyte, 
  nearly 
  all 
  of 
  which 
  has 
  been 
  used 
  up 
  to 
  

   form 
  the 
  cluster. 
  At 
  (a) 
  in 
  the 
  same 
  figure 
  are 
  seen 
  two 
  

   free, 
  unstained 
  merozoites 
  [sporozoites], 
  each 
  about 
  7 
  /x 
  by 
  

   3/x 
  and 
  containing 
  several 
  little 
  vacuoles, 
  one 
  of 
  which 
  is 
  

   often 
  more 
  prominent 
  than 
  the 
  rest. 
  

  

  Such 
  is 
  the 
  so-called 
  sporogony 
  of 
  this 
  Coccidian. 
  With 
  

   regard 
  to 
  the 
  other 
  phase 
  of 
  the 
  life-history 
  (Smith 
  and 
  

   Johnson's 
  two 
  figures 
  of 
  which 
  I 
  have 
  not 
  thought 
  it 
  neces- 
  

   sary 
  to 
  reproduce) 
  a 
  few 
  words 
  will 
  suffice 
  at 
  present, 
  since 
  it 
  

   in 
  no 
  way 
  affects 
  the 
  question 
  of 
  the 
  sporogony 
  of 
  the 
  phase 
  

   above 
  described. 
  The 
  authors 
  term 
  this 
  the 
  " 
  glomerular 
  " 
  

   stage 
  of 
  the 
  parasite, 
  since 
  it 
  is 
  found 
  in 
  the 
  epithelium 
  of 
  

   Bowman's 
  capsules, 
  whereas 
  the 
  other 
  form 
  principally 
  occurs 
  

   in 
  the 
  convoluted 
  tubules. 
  As 
  the 
  glomerular 
  form 
  was 
  only 
  

   found 
  in 
  kidneys 
  already 
  infected 
  with 
  Klossiella, 
  we 
  can, 
  

  

  