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  BEPOKT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  impossible 
  to 
  procure 
  sufficient 
  quantities. 
  After 
  the 
  failure 
  of 
  the 
  

   plankton 
  suppl}", 
  lobster 
  liver 
  was 
  used 
  as 
  food 
  and 
  continued 
  until 
  the 
  

   close 
  of 
  the 
  experiments. 
  

  

  The 
  fry 
  began 
  to 
  molt 
  on 
  May 
  28, 
  and 
  on 
  June 
  1, 
  or 
  ten 
  days 
  from 
  

   date 
  of 
  hatching, 
  the 
  majority 
  of 
  those 
  alive 
  were 
  in 
  the 
  second 
  stage^; 
  

   ))ut 
  the 
  mortality 
  was 
  considerable, 
  only 
  486, 
  or 
  about 
  one-half 
  the 
  

   original 
  number, 
  having 
  survived. 
  On 
  June 
  5, 
  1 
  had 
  reached 
  the 
  third 
  

   stage, 
  but 
  it 
  was 
  sixteen 
  days 
  from 
  the 
  date 
  of 
  hatching 
  before 
  a 
  major- 
  

   ity 
  had 
  passed 
  the 
  second 
  molt, 
  and 
  even 
  greater 
  mortalit}^ 
  occurred 
  

   during 
  this 
  period 
  than 
  during 
  the 
  first, 
  only 
  30 
  passing 
  successfully. 
  

   Of 
  these, 
  19, 
  or 
  2 
  per 
  cent 
  of 
  the 
  original 
  number, 
  reached 
  the 
  fourth 
  

   stage, 
  their 
  age 
  at 
  this 
  time 
  being 
  twenty-five 
  days; 
  This 
  percentage, 
  

   small 
  as 
  it 
  is, 
  was 
  encouraging, 
  although 
  it 
  was 
  the 
  largest 
  percentage 
  

   secured 
  at 
  Woods 
  Hole 
  by 
  the 
  methods 
  of 
  1900. 
  

  

  