﻿NOTES 
  ON 
  SPOROZOA. 
  153 
  

  

  Notes 
  on 
  Sporozoa. 
  

  

  By 
  

   H. 
  M. 
  Woodcock, 
  B.Sc.(Loii<l.). 
  

  

  I, 
  On 
  Klossiella 
  muris 
  gen. 
  et 
  spec, 
  nov., 
  Smith 
  and 
  

   Johnson, 
  1902. 
  

  

  Smith 
  and 
  Johnson 
  (1) 
  recently 
  described 
  a 
  new 
  Coccidian 
  

   parasitic 
  in 
  the 
  kidneys 
  of 
  the 
  mouse 
  (Mus 
  m 
  us 
  cuius). 
  

   The 
  seat 
  of 
  the 
  infection 
  is 
  the 
  renal 
  epithelium 
  of 
  the 
  

   convoluted 
  tubules 
  of 
  the 
  cortex 
  and 
  of 
  the 
  visceral 
  layer 
  of 
  

   Bowman's 
  capsules. 
  The 
  enormously 
  hypertrophied 
  parasite- 
  

   containing 
  cells 
  swell 
  out 
  into 
  and 
  completely 
  occlude 
  the 
  

   lumen 
  of 
  the 
  tubule, 
  causing 
  entire 
  disorganisation 
  of 
  the 
  

   affected 
  tissue. 
  

  

  The 
  diagnostic 
  characters 
  on 
  which 
  the 
  new 
  genus 
  is 
  based 
  

   tire 
  as 
  follows. 
  The 
  sporogonic 
  cycle 
  is 
  characterised 
  by 
  the 
  

   development 
  of 
  twelve 
  to 
  fourteen 
  spherical 
  spores, 
  each 
  

   about 
  16 
  jLi 
  by 
  13 
  jn, 
  and 
  containing 
  thirty 
  to 
  thirty-four 
  

   banana-shaped 
  sporozoites. 
  Another 
  phase 
  of 
  the 
  life-history 
  

   was 
  also 
  met 
  with. 
  This 
  is 
  taken 
  by 
  Smith 
  and 
  Johnson 
  to 
  

   represent 
  either 
  schizogony 
  or 
  the 
  formation 
  of 
  microgameto- 
  

   cytes, 
  but 
  actually 
  which 
  of 
  the 
  two 
  is 
  left 
  an 
  open 
  question. 
  

   As 
  a 
  matter 
  of 
  fact, 
  the 
  authors' 
  figures 
  leave 
  no 
  doubt 
  that 
  

   the 
  stage 
  which 
  they 
  have 
  described 
  as 
  sporogonic 
  is 
  nothino- 
  

   more 
  nor 
  less 
  than 
  merogony 
  or 
  schizogony, 
  while 
  the 
  other 
  

   part 
  of 
  the 
  cycle 
  is, 
  in 
  all 
  probability, 
  the 
  commencement 
  of 
  

   gametocyte 
  formation. 
  As 
  this 
  new 
  Coccidian 
  presents 
  

   certain 
  very 
  interesting 
  features, 
  I 
  have 
  thought 
  it 
  worth 
  

   while 
  to 
  give 
  a 
  re-interpretation 
  of 
  Smith 
  and 
  Johnson's 
  

  

  VOL. 
  48, 
  TART 
  1. 
  — 
  NEW 
  SEJvlEy. 
  11 
  

  

  