﻿Dr. 
  L. 
  Plate 
  on 
  Noctiluca 
  miliaris, 
  Sur. 
  23 
  

  

  often 
  -observed 
  Cjstoflagellate 
  has 
  recently 
  been 
  admirably 
  

   brought 
  together 
  by 
  Butschli 
  *, 
  I 
  shall 
  confine 
  myself 
  here 
  

   to 
  a 
  few 
  brief 
  supplementary 
  notes. 
  

  

  On 
  the 
  nucleus 
  of 
  Noctiluca 
  miliaris 
  the 
  statements 
  of 
  

   different 
  naturalists 
  considerably 
  diverge. 
  Robin 
  (whose 
  

   latest 
  memoir 
  upon 
  Noctiluca 
  I 
  have 
  unfortunately 
  been 
  

   unable 
  to 
  procure, 
  so 
  that 
  I 
  know 
  his 
  opinions 
  only 
  from 
  

   Butschli's 
  statement) 
  and 
  Vignal 
  f 
  regard 
  it 
  as 
  perfectly 
  

   homogeneous, 
  while 
  Cienkowski 
  \ 
  ascribes 
  to 
  its 
  interior 
  

   substance 
  the 
  faculty 
  of 
  drawing 
  out 
  into 
  threads 
  and 
  cords, 
  

   which 
  in 
  optical 
  cross-section 
  appear 
  to 
  the 
  observer 
  as 
  

   globules. 
  According 
  to 
  my 
  observations 
  the 
  nucleus 
  is 
  a 
  

   vesicle 
  bounded 
  by 
  a 
  distinct 
  membrane, 
  the 
  limpid 
  contents 
  

   of 
  which 
  are 
  sometimes 
  perfectly 
  homogeneous, 
  i. 
  e. 
  uniformly 
  

   finely 
  granular 
  after 
  the 
  application 
  of 
  reagents 
  ; 
  but 
  as 
  a 
  

   rule 
  there 
  are 
  in 
  the 
  nucleus 
  several 
  nucleoli, 
  which 
  are 
  true 
  

   globules 
  and 
  by 
  no 
  means 
  represent 
  mere 
  optical 
  cross-sections 
  

   of 
  plasma-cords. 
  I 
  have 
  never 
  seen 
  nuclei 
  agreeing 
  with 
  

   Cienkowski's 
  fig. 
  12, 
  and 
  consequently 
  (without 
  wishing 
  to 
  

   call 
  in 
  question 
  their 
  occurrence) 
  1 
  regard 
  such 
  nuclei 
  as 
  not 
  

   of 
  normal 
  structure. 
  The 
  nucleus 
  of 
  Noctiluca, 
  as 
  is 
  well 
  

   known, 
  is 
  imbedded 
  in 
  the 
  so-called 
  central 
  plasma. 
  But 
  

   that, 
  like 
  the 
  other 
  plasma-granules, 
  it 
  may 
  sometimes 
  be 
  

   passively 
  moved 
  to 
  and 
  fro 
  over 
  considerable 
  spaces 
  was 
  

   shown 
  by 
  some 
  individuals 
  in 
  which 
  it 
  lay 
  at 
  a 
  distance 
  from 
  

   the 
  mouth 
  in 
  a 
  somewhat 
  more 
  densely 
  reticulated 
  portion 
  of 
  

   the 
  plasma 
  §. 
  

  

  With 
  regard 
  to 
  the 
  so-called 
  " 
  bacillar 
  organ," 
  I 
  quite 
  

   agree 
  with 
  Butschli's 
  interpretation, 
  according 
  to 
  which 
  its 
  

   ridges 
  are 
  produced 
  merely 
  by 
  a 
  particularly 
  close 
  attachment 
  

   of 
  the 
  plasma 
  to 
  the 
  body-membrane. 
  If 
  we 
  place 
  a 
  Nocti- 
  

   luca 
  so 
  that 
  we 
  look 
  from 
  above 
  into 
  the 
  mouth-opening, 
  and 
  

   at 
  the 
  same 
  time 
  have 
  the 
  tentacle 
  in 
  front 
  of 
  the 
  latter, 
  

   the 
  bacillar 
  organ, 
  as 
  is 
  well 
  known, 
  takes 
  its 
  origin 
  behind 
  

   the 
  vestibule 
  in 
  the 
  form 
  of 
  two 
  connivent 
  folds. 
  I 
  believe 
  

   that 
  a 
  similar 
  formation 
  will 
  also 
  be 
  demonstrated 
  in 
  front 
  

   of 
  the 
  mouth-opening. 
  To 
  this 
  conclusion 
  I 
  have 
  been 
  led 
  

   by 
  the 
  observation 
  of 
  Noctilucce 
  in 
  course 
  of 
  regeneration. 
  

   These 
  very 
  frequently 
  show 
  not 
  only 
  three 
  granules 
  pro- 
  

   jecting 
  more 
  or 
  less 
  above 
  the 
  surface 
  of 
  the 
  body, 
  corre- 
  

   sponding 
  to 
  the 
  three 
  ends 
  of 
  the 
  bacillar 
  organ, 
  but 
  also 
  

  

  * 
  Bronn's 
  ' 
  Klassen 
  und 
  Ordnungen/ 
  Band 
  i. 
  Protozoa, 
  neu 
  bearbeitet 
  

   von 
  0. 
  Butschli 
  (1885), 
  pp. 
  1050 
  et 
  seqq. 
  

  

  t 
  Arch, 
  de 
  Physiol, 
  ser. 
  2, 
  tome 
  v. 
  (1878), 
  p. 
  486. 
  

   X 
  Arch, 
  fur 
  mikr. 
  Anat. 
  Band 
  ix. 
  (1873), 
  p. 
  49. 
  

   § 
  Confusion 
  with 
  a 
  vacuole 
  is 
  out 
  of 
  the 
  question. 
  

  

  