﻿12 
  

  

  rise 
  to 
  eggs 
  one 
  season 
  and 
  to 
  male 
  cells 
  another 
  year. 
  When 
  

   a 
  drop 
  of 
  the 
  milky 
  fluid 
  from 
  a 
  ripe 
  male 
  is 
  mixed 
  with 
  a 
  

   little 
  sea 
  water 
  and 
  examined 
  with 
  a 
  magnifying 
  power 
  of 
  

   one 
  hundred 
  diameters, 
  it 
  is 
  seen 
  at 
  a 
  glance 
  to 
  be 
  quite 
  dif- 
  

   ferent 
  from 
  the 
  fluid 
  of 
  a 
  female. 
  There 
  are 
  no 
  large 
  bodies 
  

   like 
  the 
  eggs, 
  but 
  the 
  fluid 
  is 
  filled 
  with 
  innumerable 
  num- 
  

   bers 
  of 
  minute 
  granules 
  (Figure 
  48), 
  which 
  are 
  so 
  small 
  

   that 
  the}^ 
  are 
  barely 
  visible 
  when 
  magnified 
  one 
  hundred 
  

   diameters. 
  They 
  are 
  not 
  uniformly 
  distributed, 
  but 
  are 
  

   much 
  more 
  numerous 
  at 
  some 
  points 
  than 
  at 
  others, 
  and 
  for 
  

   this 
  reason 
  the 
  fluid 
  has 
  a 
  cloudy 
  or 
  curdled 
  appearance. 
  By 
  

   selecting 
  a 
  place 
  where 
  the 
  granules 
  are 
  few 
  and 
  pretty 
  well 
  

   scattered, 
  very 
  careful 
  watching 
  will 
  show 
  that 
  each 
  of 
  them 
  

   has 
  a 
  lively 
  dancing 
  motion, 
  and 
  examination 
  with 
  a 
  power 
  

   of 
  five 
  hundred 
  diameters 
  will 
  show 
  that 
  each 
  of 
  them 
  is 
  tad- 
  

   poll-shaped 
  (Figure 
  50), 
  and 
  consists 
  of 
  a 
  small, 
  oval, 
  sharply 
  

   defined 
  " 
  head 
  " 
  and 
  a 
  long, 
  delicate 
  " 
  tail," 
  by 
  the 
  lashing 
  

   of 
  which 
  the 
  dancing 
  is 
  produced. 
  

  

  It 
  is 
  more 
  difficult 
  to 
  decide 
  whether 
  the 
  male 
  cells 
  are 
  per- 
  

   fectly 
  ripe 
  than 
  it 
  is 
  to 
  decide 
  in 
  the 
  case 
  of 
  the 
  eggs. 
  With 
  

   a 
  magnifying 
  power 
  of 
  five 
  hundred 
  diameters, 
  each 
  "head" 
  

   should 
  have 
  a 
  clear, 
  well-marked 
  outline, 
  and 
  they 
  should 
  be 
  

   very 
  uniform 
  in 
  size, 
  and 
  separated 
  from 
  each 
  other, 
  as 
  in 
  

   Figure 
  50. 
  Under 
  very 
  favorable 
  circumstances 
  this 
  power 
  

   should 
  also 
  show 
  the 
  " 
  tails," 
  as 
  very 
  faint 
  undulating 
  lines. 
  

  

  If 
  the 
  " 
  heads 
  " 
  vary 
  much 
  in 
  size, 
  or 
  if 
  they 
  are 
  aggre- 
  

   gated 
  into 
  bunches, 
  with 
  the 
  " 
  tails 
  " 
  radiating 
  from 
  the 
  

   bunches 
  in 
  all 
  directions, 
  or 
  if 
  there 
  is 
  much 
  granular 
  matter 
  

   so 
  small 
  that 
  the 
  outlines 
  of 
  the 
  particles 
  are 
  not 
  visible 
  

   when 
  magnified 
  five 
  hundred 
  diameters, 
  the 
  Huid 
  is 
  not 
  per- 
  

   fectly 
  ripe, 
  aud 
  fertilization 
  with 
  it 
  will 
  not 
  in 
  all 
  probability 
  

   be 
  very 
  successful. 
  

  

  NUMBER 
  OF 
  EGGS. 
  

  

  As 
  the 
  male 
  cells 
  are 
  infinitely 
  more 
  numerous 
  than 
  the 
  

   eggs, 
  the 
  ripe 
  Huid 
  from 
  even 
  one 
  small 
  male 
  is 
  enough 
  to 
  

   fertilize 
  all 
  the 
  eggs 
  of 
  five 
  or 
  six 
  large 
  females. 
  

  

  