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  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  f74] 
  

  

  EXPLANATION 
  OF 
  PLATE 
  IX. 
  

  

  Roccus 
  amekicanus. 
  (The 
  White 
  Perch.) 
  

  

  Fig. 
  40. 
  The 
  just 
  hatched 
  embryo, 
  x 
  32. 
  

  

  Fig. 
  41. 
  The 
  young 
  white 
  perch 
  one 
  day 
  old. 
  x 
  32. 
  

  

  Fig. 
  42. 
  The 
  same, 
  three 
  days 
  old. 
  x 
  32. 
  

  

  Fig. 
  43. 
  The 
  same, 
  five 
  days 
  old. 
  x 
  35. 
  

  

  Fig. 
  44. 
  The 
  same, 
  six 
  days 
  old. 
  x 
  32. 
  

  

  