﻿Reproductive 
  organs 
  of 
  Taenia 
  pisiformis. 
  417 
  

  

  Fig. 
  38. 
  Idem, 
  showing 
  amitosis. 
  

  

  Fig. 
  39. 
  Idem, 
  showing 
  two 
  cells 
  p 
  and 
  p)\ 
  iii 
  testis 
  membrane. 
  

  

  Fig. 
  40. 
  Idem, 
  showing 
  two 
  cells 
  c 
  and 
  d 
  completing 
  an 
  amitosis 
  

   lyhile 
  a 
  and 
  h 
  show 
  evidence 
  of 
  recent 
  separation. 
  Note 
  the 
  nearly 
  

   straight 
  edges 
  of 
  separation 
  of 
  each, 
  e 
  and 
  f 
  two 
  older 
  spermatogonia. 
  

  

  Fig. 
  41. 
  Earliest 
  anläge 
  of 
  testis, 
  showing 
  relation 
  between 
  parent 
  

   parenchyma 
  cell 
  p 
  and 
  spermatogonia 
  sg. 
  

  

  Fig. 
  42. 
  Connection 
  between 
  vas 
  efferens 
  and 
  testis. 
  

  

  Fig. 
  43. 
  Second 
  stage 
  of 
  testis 
  showing 
  prophases 
  in 
  first 
  spermato- 
  

   cytes. 
  

  

  Fig. 
  44. 
  Third 
  stage 
  of 
  testis, 
  showing 
  second 
  spermatocytes 
  sc.^ 
  

   and 
  connection 
  of 
  two 
  spermatozoa 
  with 
  one 
  of 
  these 
  at 
  x 
  and 
  x.^. 
  

  

  Fig. 
  45. 
  Idem. 
  Developing 
  sperm 
  sp, 
  and 
  second 
  spermatocytes 
  sc^ 
  

   :and 
  X. 
  The 
  connection 
  between 
  the 
  former 
  and 
  the 
  "nucleolus" 
  of 
  the 
  

   latter 
  was 
  observable 
  at 
  a 
  slightly 
  different 
  focus 
  from 
  that 
  of 
  the 
  photograph. 
  

  

  Fig. 
  46. 
  Idem, 
  showing 
  attachment 
  between 
  second 
  spermatocyte 
  sc^, 
  

   and 
  sperm 
  sp. 
  The 
  latter 
  appears 
  to 
  branch 
  in 
  the 
  figure, 
  connecting 
  

   with 
  two 
  spermatocytes, 
  but 
  this 
  is 
  not 
  the 
  case. 
  

  

  Fig. 
  47. 
  Idem, 
  showing 
  attachment 
  between 
  sperm 
  and 
  degenerating 
  

   skein 
  of 
  first 
  spermatocyte 
  at 
  x. 
  

  

  Fig. 
  48 
  and 
  49. 
  Idem, 
  showing 
  elongation 
  of 
  second 
  spermatocytes 
  

   at 
  X 
  to 
  form 
  spermatozoa. 
  

  

  Fig. 
  50. 
  Idem, 
  showing 
  sperms 
  developing 
  from 
  chromidia 
  at 
  x. 
  

   Other 
  chromidia 
  may 
  be 
  seen 
  in 
  the 
  figure. 
  

  

  Fig. 
  51. 
  Idem, 
  showing 
  developing 
  spermatozoa. 
  

  

  Fig. 
  52. 
  Prophase 
  of 
  abortive 
  first 
  maturation 
  mitosis 
  in 
  ovary. 
  

  

  Fig. 
  53. 
  Idem, 
  earlier 
  stage. 
  

  

  Fig. 
  54. 
  Late 
  testis, 
  showing 
  solid 
  sperms 
  at 
  x 
  and 
  hollow 
  sperms 
  

   •at 
  X-I 
  . 
  

  

  Fig. 
  55. 
  Ovarian 
  eggs 
  with 
  yolk 
  nucleus 
  ? 
  at 
  n. 
  

  

  Fig. 
  56. 
  Part 
  of 
  Fig. 
  53 
  enlarged. 
  

  

  Plate 
  21. 
  

  

  Fig. 
  57. 
  Developing 
  yolk 
  gland. 
  

  

  Fig. 
  58. 
  Adult 
  yolk 
  gland. 
  

  

  Fig. 
  59. 
  Prophase 
  of 
  second 
  abortive 
  maturation 
  in 
  egg. 
  

  

  Fig. 
  60. 
  Pole 
  view 
  of 
  maturation 
  spindle 
  showing 
  aster 
  and 
  equatorial 
  

   yolk 
  ring. 
  

  

  Fig. 
  61 
  — 
  65. 
  Side 
  views 
  of 
  maturation 
  spindles 
  and 
  equatorial 
  plates. 
  

   In 
  Figs. 
  63 
  and 
  64 
  the 
  asters 
  are 
  degenerating. 
  In 
  Figs. 
  63 
  — 
  65 
  are 
  

   shown 
  yolk 
  cells 
  ; 
  in 
  Fig. 
  65 
  this 
  is 
  well 
  advanced 
  and 
  contains 
  a 
  mass 
  

   of 
  food 
  bodies. 
  

  

  