﻿Occurrence 
  of 
  Diatoms 
  on 
  the 
  Skin 
  of 
  Whales. 
  

  

  357 
  

  

  Pinnularia 
  biceps 
  Greg. 
  

  

  Gregory, 
  W., 
  1856, 
  1 
  Q. 
  J. 
  M. 
  S.' 
  IV, 
  p. 
  8, 
  Plate 
  1, 
  tig. 
  28. 
  

  

  This 
  form 
  was 
  sparsely 
  represented 
  in 
  the 
  sample 
  containing 
  Navicula 
  

   viridis, 
  and 
  in 
  no 
  others. 
  These 
  specimens 
  are 
  smaller 
  (30 
  fi) 
  and 
  less 
  robust 
  

   than 
  the 
  type, 
  and 
  the 
  costas 
  are 
  not 
  completely 
  interrupted. 
  If, 
  as 
  here, 
  

   the 
  genus 
  Pinnularia 
  is 
  not 
  admitted, 
  the 
  specific 
  name 
  interrupta 
  is 
  not 
  

   available, 
  being 
  pre-occupied 
  by 
  Kutzing 
  (1844). 
  The 
  taxonomy 
  is 
  further 
  

   complicated 
  by 
  the 
  use 
  of 
  the 
  specific 
  name 
  Keeps 
  by 
  Ehrenberg 
  (1843), 
  for 
  a 
  

   form 
  differing 
  from 
  Gregory's. 
  A 
  complete 
  discussion 
  of 
  the 
  synonymy 
  

   would 
  be 
  outside 
  the 
  scope 
  of 
  this 
  paper. 
  

  

  It 
  is 
  desirable 
  to 
  investigate 
  the 
  question 
  of 
  the 
  occurrence 
  of 
  Diatoms 
  on 
  

   the 
  skin 
  of 
  whales 
  further, 
  and 
  suitable 
  material 
  would 
  be 
  gratefully 
  

   received 
  by 
  the 
  British 
  Museum 
  (Natural 
  History). 
  For 
  this 
  purpose 
  

   numerous 
  samples 
  should 
  be 
  collected, 
  from 
  various 
  localities, 
  or 
  from 
  the 
  

   same 
  locality 
  at 
  different 
  seasons 
  of 
  the 
  year. 
  A 
  careful 
  record 
  should 
  be 
  

   kept 
  of 
  the 
  species 
  of 
  whale, 
  with 
  the 
  locality 
  and 
  date. 
  Special 
  care 
  should 
  

   be 
  taken 
  to 
  obtain 
  samples 
  which 
  have 
  not 
  been 
  contaminated 
  by 
  contact 
  

   of 
  the 
  whale's 
  skin 
  with 
  foreign 
  bodies. 
  Material 
  of 
  similar 
  appearance 
  

   should 
  be 
  collected, 
  if 
  possible, 
  from 
  ice, 
  algse, 
  wood, 
  shells, 
  stones, 
  or 
  other 
  

   submerged 
  objects. 
  The 
  method 
  of 
  preservation 
  recommended 
  is 
  as 
  follows 
  : 
  

   To 
  every 
  250 
  c.c. 
  of 
  the 
  material 
  in 
  sea-water 
  add 
  10 
  c.c. 
  of 
  strong 
  Flemming's 
  

   solution 
  (15 
  volumes 
  of 
  1 
  per 
  cent, 
  chromic 
  acid, 
  4 
  volumes 
  of 
  2 
  per 
  cent, 
  

   osrnic 
  acid, 
  and 
  1 
  volume 
  of 
  glacial 
  acetic 
  acid), 
  and 
  store 
  in 
  stoppered 
  bottles. 
  

   A 
  simpler 
  procedure 
  is 
  to 
  put 
  the 
  material 
  direct 
  into 
  10 
  per 
  cent, 
  formalin 
  

   solution. 
  

  

  