﻿NOTES 
  ON 
  SPOROZOA. 
  161 
  

  

  doubtless, 
  by 
  a 
  "bud" 
  of 
  cytoplasm), 
  and 
  between 
  tliem 
  

   deep 
  grooves 
  extend 
  inwards, 
  so 
  that 
  at 
  length 
  the 
  whole 
  

   schizont 
  becomes 
  cut 
  up 
  into 
  several 
  portions 
  — 
  the 
  schizonto- 
  

   cytes. 
  He 
  does 
  not 
  add 
  whether 
  any 
  residual 
  cytoplasm 
  may 
  

   be 
  left 
  over 
  unused 
  or 
  not. 
  A 
  small 
  point 
  distinguishing 
  the 
  

   schizogony 
  in 
  this 
  genus 
  is 
  the 
  unusually 
  minute 
  size 
  of 
  the 
  

   karyosomes, 
  which 
  are 
  present 
  in 
  the 
  daughter-nuclei 
  only 
  as 
  

   one 
  or 
  two 
  granules. 
  1 
  think 
  the 
  last 
  doubt 
  will 
  be 
  removed 
  

   by 
  a 
  comparison 
  of 
  Figs. 
  B 
  (8) 
  and 
  A 
  (6), 
  especially 
  if 
  we 
  

   regard 
  each 
  of 
  the 
  clusters 
  in 
  the 
  latter 
  as 
  showing 
  up 
  like 
  

   it 
  does 
  in 
  Fig. 
  5 
  (b). 
  In 
  both 
  cases 
  all 
  the 
  '^ 
  barillets 
  " 
  are 
  

   enclosed 
  by 
  the 
  partly 
  or 
  entirely 
  atrophied 
  cell 
  or 
  cell-mass 
  

   and 
  by 
  that 
  alone. 
  The 
  only 
  slight 
  difference 
  is 
  that 
  in 
  those 
  

   of 
  Caryotropha 
  the 
  remains 
  of 
  the 
  daughter-schizonts 
  seem 
  

   to 
  have 
  more 
  completely 
  broken 
  down 
  than 
  they 
  have 
  in 
  

   Klossielia, 
  leaving 
  no 
  distinct 
  enclosing 
  membrane. 
  It 
  is, 
  

   however, 
  most 
  likely 
  that 
  in 
  older 
  clusters 
  of 
  the 
  latter 
  genus 
  

   the 
  delicate 
  investment 
  around 
  each 
  also 
  naturally 
  breaks 
  

   down, 
  as, 
  indeed, 
  it 
  must 
  do 
  if 
  the 
  essential 
  object 
  of 
  schizo- 
  

   gony, 
  namely 
  auto-infection, 
  is 
  to 
  be 
  attained. 
  

  

  The 
  marked 
  correspondence 
  between 
  the 
  schizogonic 
  

   process 
  in 
  the 
  two 
  forms 
  does 
  not 
  appear 
  to 
  be 
  maintained 
  

   in 
  microgametocyte-formation. 
  In 
  Caryotropha 
  this 
  re- 
  

   sembles 
  schizogony 
  to 
  a 
  surprising 
  extent, 
  and 
  serves 
  to 
  

   emphasize 
  the 
  complete 
  homology 
  of 
  the 
  two 
  kinds 
  of 
  repro- 
  

   ductive 
  germ. 
  Briefly 
  stated, 
  a 
  number 
  of 
  microgametocytes 
  

   of 
  the 
  second 
  order 
  (strictly 
  comparable 
  to 
  schizontocytes) 
  

   are 
  intercalated 
  between 
  the 
  original 
  microgametocyte 
  (of 
  the 
  

   first 
  order) 
  and 
  the 
  ultimate 
  male 
  gametes. 
  The 
  micro- 
  

   gametes 
  themselves 
  arise 
  from 
  these 
  daughter-raicrogameto- 
  

   cytes 
  exactly 
  as 
  if 
  they 
  originated 
  in 
  the 
  usual 
  manner 
  from 
  

   the 
  microgametocyte 
  of 
  the 
  first 
  order, 
  as, 
  e. 
  g. 
  in 
  Coccidium. 
  

   Until 
  ripe 
  and 
  ready 
  for 
  liberation 
  they 
  are 
  all 
  contained 
  

   within 
  the 
  atrophied 
  host-cell, 
  just 
  as 
  are 
  the 
  clusters 
  of 
  

   merozoites. 
  So 
  far 
  as 
  can 
  be 
  gathered 
  from 
  Smith 
  and 
  

   Johnson's 
  account 
  nothing 
  of 
  the 
  kind 
  occurs 
  in 
  Klossiella; 
  

   but 
  this 
  form, 
  on 
  the 
  other 
  hand, 
  would 
  appear 
  to 
  possess 
  a 
  

  

  