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  Bulletin 
  of 
  the 
  British 
  

  

  Anas 
  laysanensis, 
  sp. 
  n. 
  

  

  Bill 
  blackish 
  ; 
  top 
  of 
  the 
  head 
  and 
  hind 
  neck 
  deep 
  blackish 
  

   brown 
  ; 
  sides 
  of 
  the 
  head 
  more 
  mottled 
  with 
  brown 
  ; 
  round 
  

   the 
  eye 
  a 
  white 
  ring; 
  interscapular 
  region, 
  scapulars, 
  and 
  wing- 
  

   coverts 
  light 
  rusty 
  brown, 
  boldly 
  variegated 
  with 
  blackish 
  ; 
  

   feathers 
  of 
  the 
  back 
  and 
  rump 
  blackish, 
  edged 
  with 
  rufous 
  

   brown 
  and 
  with 
  more 
  or 
  less 
  conspicuous 
  pale 
  shaft-lines 
  ; 
  

   upper 
  tail-coverts 
  and 
  rectrices 
  light 
  brown, 
  barred 
  with 
  

   blackish 
  ; 
  primaries 
  pale 
  brown, 
  with 
  very 
  light 
  edges 
  ; 
  chin 
  

   Avhitish 
  ; 
  feathers 
  of 
  the 
  rest 
  of 
  the 
  lower 
  parts 
  light 
  rusty 
  

   brown, 
  irregularly 
  barred 
  and 
  spotted 
  with 
  darker 
  brown 
  ; 
  

   feet 
  yellow. 
  In 
  the 
  male 
  there 
  is 
  a 
  conspicuous 
  deep 
  green 
  

   and 
  black 
  speculum, 
  bordered 
  with 
  white 
  below 
  ; 
  in 
  the 
  

   female 
  the 
  speculum 
  is 
  only 
  indicated, 
  the 
  primary-coverts 
  

   being 
  edged 
  with 
  white. 
  Total 
  length 
  15 
  to 
  17 
  inches, 
  wing 
  

   7*5 
  to 
  7'7 
  , 
  tail 
  3'5, 
  culmen 
  16, 
  tarsus 
  V9. 
  

  

  Hah. 
  Island 
  of 
  Laysan, 
  North 
  Pacific. 
  

  

  Mr. 
  Henry 
  Seebohm 
  exhibited 
  two 
  examples 
  (<^ 
  and 
  ? 
  ) 
  

   of 
  a 
  Crossoptilon 
  which 
  he 
  regarded 
  as 
  representing 
  an 
  

   undescribed 
  species. 
  He 
  proposed 
  to 
  call 
  it 
  

  

  Crossoptilon 
  leucurum. 
  

   C. 
  similis 
  C. 
  tibetano, 
  sed 
  rectricibus 
  albis 
  nigro 
  terminatis 
  

   ( 
  ^ 
  ) 
  aut 
  marginatis 
  ( 
  ? 
  ) 
  distinguendum. 
  

  

  These 
  examples 
  had 
  been 
  obtained 
  by 
  Captain 
  Bower 
  and 
  

   Dr. 
  Thorold 
  in 
  Eastern 
  Tibet 
  between 
  the 
  Sok 
  Pass 
  and 
  

   Chiamdo. 
  Similar 
  specimens 
  had 
  been 
  obtained 
  by 
  Prince 
  

   Henry 
  of 
  Orleans 
  and 
  Monsieur 
  Bonvalot 
  on 
  the 
  plateau 
  

   between 
  the 
  Sok 
  Pass 
  and 
  Lhassa. 
  Still 
  further 
  to 
  the 
  

   south, 
  150 
  miles 
  east 
  of 
  Lhassa, 
  Avas 
  found 
  C. 
  harmani, 
  of 
  

   which 
  a 
  drawing 
  was 
  exhibited. 
  East 
  of 
  Chiamdo 
  and 
  

   Batang, 
  examples 
  of 
  6'. 
  tibetanum 
  had 
  been 
  found 
  by 
  the 
  

   Abbe 
  David 
  in 
  Moupin, 
  and 
  by 
  Mr. 
  Pratt 
  at 
  Ta-chien-loo, 
  and 
  

   examples 
  from 
  both 
  localities 
  were 
  exhibited. 
  The 
  range 
  of 
  

   this 
  species 
  seemed 
  to 
  overlap 
  that 
  of 
  C. 
  leucurum 
  in 
  East 
  

   Tibet, 
  but 
  the 
  latter 
  was 
  not 
  known 
  to 
  extend 
  into 
  Western 
  

   China. 
  Examples 
  of 
  C. 
  auritum 
  collected 
  by 
  General 
  Prje- 
  

   valski 
  on 
  the 
  i)iateau 
  east 
  of 
  Koko-Nor, 
  and 
  the 
  type 
  of 
  

  

  