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  Mr. 
  A. 
  G. 
  Bennett. 
  On 
  the 
  

  

  all 
  whales 
  would 
  be 
  found, 
  on 
  closer 
  examination, 
  to 
  be 
  hosts 
  to 
  Diatoms, 
  

   and 
  that 
  the 
  extensive 
  collection 
  of 
  samples 
  of 
  their 
  cutaneous 
  investment 
  

   might 
  be 
  of 
  material 
  assistance 
  in 
  tracing 
  their 
  migrations. 
  

  

  Appendix 
  to 
  the 
  above 
  Note, 
  by 
  E. 
  W. 
  Nelson. 
  

  

  I 
  have 
  received, 
  through 
  the 
  British 
  Museum 
  (Natural 
  History) 
  a 
  series 
  of 
  

   samples 
  which 
  were 
  collected 
  by 
  Mr. 
  A. 
  G. 
  Bennett 
  as 
  evidence 
  of 
  the 
  conclusion 
  

   he 
  has 
  come 
  to 
  with 
  regard 
  to 
  the 
  nature 
  of 
  the 
  yellow 
  colour 
  of 
  certain 
  

   Antarctic 
  Fin 
  Whales 
  and 
  Blue 
  Whales. 
  These 
  consisted 
  of 
  four 
  mounted 
  

   slides, 
  three 
  tubes 
  containing 
  the 
  dried 
  epidermal 
  him, 
  and 
  a 
  small 
  tube 
  

   containing 
  portions 
  of 
  the 
  film, 
  from 
  either 
  a 
  Blue 
  Whale 
  or 
  a 
  Fin 
  Whale, 
  

   which 
  had 
  been 
  treated 
  with 
  nitric 
  acid. 
  In 
  every 
  case 
  the 
  sample 
  contained 
  

   specimens 
  of 
  a 
  Diatom 
  belonging 
  to 
  the 
  genus 
  Cocconeis, 
  Ehrb., 
  probably 
  

   belonging 
  to 
  a 
  new 
  species 
  which 
  I 
  describe 
  below 
  as 
  G. 
  ceticola, 
  n.sp. 
  With 
  

   one 
  exception, 
  this 
  species 
  constituted 
  the 
  whole 
  of 
  the 
  film, 
  and 
  of 
  course 
  

   occurred 
  in 
  immense 
  numbers. 
  The 
  exception 
  referred 
  to 
  was 
  the 
  tube 
  

   containing 
  the 
  material 
  which 
  had 
  been 
  treated 
  with 
  nitric 
  acid 
  ; 
  and 
  this 
  

   consisted 
  of 
  C. 
  ceticola 
  and 
  Navicula 
  viridis 
  (Mtzsch) 
  in 
  about 
  equal 
  propor- 
  

   tions, 
  with 
  a 
  sparse 
  admixture 
  of 
  another 
  species 
  of 
  Navicula. 
  N. 
  viridis 
  is 
  

   usually 
  a 
  fresh-water 
  species, 
  but 
  it 
  has 
  been 
  recorded 
  as 
  marine 
  by 
  Petit,* 
  

   who 
  describes 
  it 
  as 
  " 
  tres 
  commune 
  sur 
  les 
  Algues 
  marines." 
  This 
  is 
  the 
  only 
  

   record 
  I 
  can 
  find 
  of 
  this 
  species, 
  or 
  of 
  the 
  closely 
  related 
  species 
  N. 
  major, 
  

   N. 
  nobilis, 
  and 
  N. 
  dactylus 
  being 
  found, 
  presumably 
  living, 
  in 
  marine 
  material, 
  

   although 
  they 
  sometimes 
  occur 
  in 
  marine 
  soundings.f 
  It 
  may 
  be 
  noted, 
  

   however, 
  with 
  regard 
  to 
  this 
  sample, 
  that 
  from 
  evidence 
  which 
  has 
  been 
  

   supplied 
  by 
  Mr. 
  Bennett 
  it 
  is 
  by 
  no 
  means 
  unlikely 
  that 
  the 
  material 
  from 
  

   the 
  skin 
  of 
  the 
  whale 
  was 
  contaminated 
  with 
  material 
  from 
  another 
  source 
  

   during 
  its 
  preparation. 
  

  

  It 
  thus 
  appears 
  that, 
  with 
  one 
  exception 
  which 
  is 
  doubtful, 
  the 
  whole 
  of 
  

   the 
  material 
  collected 
  by 
  Mr. 
  Bennett 
  consists 
  entirely 
  of 
  great 
  numbers 
  of 
  a 
  

   single 
  species 
  of 
  Diatom, 
  in 
  a 
  state 
  of 
  absolute 
  purity. 
  This 
  fact 
  goes 
  far 
  

   towards 
  showing 
  that 
  the 
  association 
  of 
  the 
  Diatoms 
  with 
  the 
  whale's 
  skin 
  is 
  

   more 
  than 
  an 
  accidental 
  one. 
  Several 
  of 
  the 
  samples 
  were 
  of 
  a 
  distinct 
  yellow 
  

   colour 
  ; 
  and 
  that 
  of 
  the 
  dry 
  samples 
  corresponded 
  with 
  No. 
  171 
  of 
  Klinck- 
  

   sieck 
  et 
  Valette's 
  " 
  Code 
  des 
  Couleurs." 
  The 
  samples 
  were 
  all 
  from 
  Blue 
  

   Whales 
  or 
  Fin 
  Whales 
  collected 
  at 
  the 
  South 
  Shetlands 
  in 
  1919 
  ; 
  and 
  those 
  

  

  * 
  Petit, 
  P., 
  " 
  Diatomees 
  recoltees 
  dans 
  le 
  voisinage 
  du 
  Cap 
  Horn," 
  ' 
  Miss. 
  Sci. 
  du 
  Cap 
  

   Horn,' 
  vol. 
  5, 
  Botanique, 
  p. 
  121, 
  Paris 
  (1888). 
  

  

  t 
  See 
  Mann, 
  A., 
  " 
  Diatoms 
  of 
  the 
  Albatross 
  Voyages," 
  ' 
  Contr. 
  U. 
  S. 
  Nat. 
  Herbarium,' 
  

   vol. 
  10, 
  Part 
  V, 
  p. 
  359, 
  Washington 
  (1907). 
  

  

  