﻿420 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [40] 
  

  

  the 
  cultch, 
  with 
  its 
  adherent 
  spat, 
  upon 
  a 
  good 
  bottom, 
  where 
  it 
  maybe 
  

   allowed 
  to 
  remain 
  until 
  fully 
  grown. 
  Two 
  hundred 
  bushels 
  of 
  shells, 
  

   covered 
  with 
  a 
  good 
  set 
  of 
  spat, 
  is 
  an 
  abundance 
  of 
  seed 
  for 
  one 
  acre, 
  

   as 
  the 
  spat 
  will 
  gain 
  at 
  least 
  thirty 
  to 
  sixty 
  times 
  its 
  own 
  bulk 
  in 
  the 
  

   course 
  of 
  the 
  next 
  four 
  years, 
  at 
  the 
  end 
  of 
  which 
  time 
  it 
  becomes 
  mar- 
  

   ketable. 
  

  

  X. 
  Professor 
  Lankester 
  has 
  recently 
  published* 
  some 
  investigations 
  

   upon 
  the 
  subject 
  of 
  green 
  oysters, 
  and 
  has 
  singularly 
  enough 
  over- 
  

   looked 
  some 
  of 
  the 
  most 
  important 
  contributions 
  to 
  the 
  subject 
  pre- 
  

   viously 
  published 
  by 
  others; 
  in 
  fact, 
  he 
  has 
  been, 
  in 
  the 
  main, 
  anticipated 
  

   by 
  the 
  writer 
  by 
  at 
  least 
  four 
  years, 
  as 
  may 
  be 
  learned 
  by 
  reference 
  to 
  

   the 
  papers 
  cited 
  below, 
  t 
  

  

  He 
  also 
  seems 
  to 
  have 
  been 
  unaware 
  of 
  the 
  researches 
  of 
  MM. 
  Puy- 
  

   s£gur 
  and 
  Decaisne, 
  published 
  five 
  years 
  ago, 
  the 
  first-named 
  of 
  whom, 
  

   contrary 
  to 
  the 
  assertion 
  of 
  Professor 
  Lankester, 
  published 
  colored 
  fig- 
  

   ures 
  illustrating 
  the 
  pigment 
  of 
  Navicula 
  ostrearia 
  in 
  1880, 
  in 
  a 
  memoir, 
  

   of 
  which 
  I 
  give 
  the 
  title 
  in 
  full 
  below. 
  f 
  

  

  The 
  second 
  point 
  which 
  Professor 
  Lankester 
  claims 
  to 
  have 
  first 
  de- 
  

   monstrated, 
  viz, 
  the 
  occurrence 
  of 
  Navicula 
  ostrearia 
  in 
  the 
  intestine 
  of 
  

   green 
  oysters, 
  was 
  also 
  previously 
  determined 
  by 
  M. 
  Puysegur, 
  as 
  may 
  

   be 
  seen 
  by 
  reference 
  to 
  the 
  paper 
  cited 
  above, 
  or 
  to 
  a 
  translation 
  of 
  the 
  

   same 
  in 
  the 
  report 
  of 
  the 
  United 
  States 
  Commissioner 
  of 
  Fisheries 
  for 
  

   1882, 
  p. 
  800, 
  as 
  well 
  as 
  a 
  notice 
  of 
  it 
  published 
  in 
  Nature, 
  xxii, 
  1880, 
  pp. 
  

   549-50. 
  

  

  The 
  third 
  conclusion 
  arrived 
  at 
  by 
  Professor 
  Lankester 
  in 
  the 
  sum- 
  

   mary 
  of 
  his 
  results 
  given 
  at 
  the 
  clo 
  se 
  of 
  his 
  paper 
  is 
  not 
  borne 
  out 
  by 
  

   an 
  examination 
  of 
  sections 
  of 
  the 
  gills 
  of 
  the 
  oyster 
  and 
  clam 
  prepared 
  

   from 
  specimens 
  affected 
  with 
  the 
  peculiar 
  viridity 
  so 
  well 
  known 
  to 
  

   European 
  epicures; 
  and, 
  moreover, 
  it 
  does 
  not 
  seem 
  probable 
  that 
  cells 
  

   which 
  are 
  clearly 
  epithelial 
  should 
  wander 
  back 
  into 
  the 
  circulation 
  and 
  

   collect 
  together 
  in 
  large 
  cysts 
  in 
  the 
  mantle 
  and 
  also 
  lodge 
  in 
  the 
  ven- 
  

   tricle 
  of 
  the 
  heart 
  to 
  the 
  number 
  of 
  many 
  thousands, 
  as 
  I 
  have 
  often 
  

   observed 
  in 
  green 
  oysters 
  ; 
  nor 
  does 
  it 
  seem 
  possible 
  to 
  explain 
  the 
  fact 
  of 
  

   the 
  whole 
  animal 
  becoming 
  green, 
  with 
  the 
  exception 
  of 
  the 
  adductor 
  mus- 
  

   cles, 
  as 
  sometimes 
  occurs 
  on 
  Professor 
  Lankester's 
  hypothesis. 
  There 
  is 
  

  

  * 
  On 
  Green 
  Oysters' 
  By 
  E. 
  Ray 
  Lankester, 
  M. 
  A., 
  LL. 
  D., 
  F. 
  R. 
  S. 
  Quarterly 
  Jour. 
  

   Mic. 
  Science, 
  Nov., 
  18S5, 
  new 
  series, 
  No. 
  CI, 
  pp. 
  71-94, 
  pi. 
  VII. 
  

  

  1 
  1. 
  Notes 
  on 
  the 
  breeding, 
  food, 
  and 
  green 
  color 
  of 
  the 
  oyster. 
  Bull. 
  U. 
  S. 
  Fish 
  

   Commission, 
  I, 
  1881, 
  pp. 
  403-419. 
  (This 
  paper 
  also 
  appeared 
  previously 
  in 
  Forest 
  and 
  

   Stream.) 
  

  

  2. 
  Supplementary 
  note 
  on 
  the 
  coloration 
  of 
  the 
  blood 
  corpuscles 
  of 
  the 
  oyster. 
  Re- 
  

   port 
  of 
  the 
  U. 
  S. 
  Commissioner 
  of 
  Fish 
  and 
  Fisheries 
  for 
  1882, 
  pp. 
  801-805. 
  

  

  3. 
  On 
  the 
  green 
  color 
  of 
  the 
  oyster. 
  Am. 
  Naturalist, 
  1883, 
  pp. 
  87-88. 
  

  

  4. 
  On 
  the 
  green 
  coloration 
  of 
  the 
  gills 
  and 
  palps 
  of 
  the 
  clam 
  (Mya 
  armaria). 
  Bull. 
  

   U. 
  S. 
  Fish 
  Commission, 
  V, 
  1885, 
  pp. 
  181-185. 
  

  

  i 
  Notice 
  sur 
  la 
  cause 
  du 
  verdissemeut 
  des 
  huitres. 
  Par 
  M. 
  Puys6gur, 
  sous-commis- 
  

   eaire 
  de 
  la 
  marine, 
  Chevalier 
  do 
  la 
  Legion 
  d'Honneur. 
  (Extracted 
  from 
  Rev. 
  Mari- 
  

   time 
  et 
  Coloniale.) 
  Pp. 
  11, 
  1 
  pi. 
  Paris, 
  Berger-Levrault 
  et 
  Cie., 
  1880. 
  

  

  