﻿ACADEMY 
  OF 
  SCIENCES. 
  25 
  

  

  " 
  The 
  Vice-President 
  shall 
  attend 
  all 
  meetings 
  of 
  the 
  Trustees, 
  

   and 
  in 
  case 
  of 
  the 
  absence 
  of 
  the 
  President 
  shall 
  preside 
  at 
  the 
  same 
  

   and 
  be 
  entitled 
  to 
  vote." 
  

  

  Notes 
  on 
  the 
  Avi-fauna 
  of 
  the 
  Aleutian 
  Islands, 
  from 
  Una- 
  

   lashka 
  eastward.* 
  

  

  BY 
  W. 
  H. 
  DALL, 
  U. 
  S. 
  COAST 
  SURVEY. 
  

  

  The 
  following 
  notes 
  were 
  taken 
  during 
  the 
  year, 
  from 
  October, 
  1871, 
  to 
  Aug- 
  

   ust, 
  1872, 
  inclusive, 
  while 
  employed 
  in 
  a 
  geographical 
  reconnaissance 
  among 
  

   the 
  Aleutian 
  Islands, 
  for 
  the 
  U. 
  S. 
  Coast 
  Survey, 
  The 
  specimens 
  have 
  been 
  

   deposited 
  in 
  the 
  National 
  Museum 
  at 
  Washington 
  ; 
  and 
  I 
  am 
  under 
  obligations 
  

   to 
  Prof. 
  S. 
  P. 
  Baird, 
  of 
  the 
  Smithsonian 
  Institution, 
  for 
  assistance 
  in 
  identifying 
  

   the 
  species. 
  The 
  nomenclature 
  and 
  arrangement 
  adopted 
  is 
  that 
  of 
  ihe 
  " 
  Birds 
  

   of 
  North 
  America," 
  by 
  Baird, 
  Oassin 
  and 
  Lawrence, 
  and 
  the 
  numbers 
  affixed 
  

   to 
  the 
  species 
  are 
  those 
  of 
  the 
  catalogue 
  of 
  species 
  which 
  accompanies 
  that 
  

   work. 
  The 
  facts 
  noted 
  are 
  an 
  additional 
  confirmation 
  of 
  the 
  peculiarities 
  of 
  

   distribution 
  noted 
  by 
  me 
  in 
  previous 
  publications 
  on 
  the 
  fauna 
  and 
  birds 
  of 
  

   Alaska; 
  and 
  the 
  region 
  visited 
  is 
  of 
  peculiar 
  interest, 
  as 
  being 
  the 
  portion 
  of 
  

   the 
  West 
  Coast 
  where 
  the 
  Arctic 
  Canadian 
  fauna 
  of 
  the 
  region 
  north 
  of 
  the 
  

   Alaskan 
  Range, 
  and 
  the 
  characteristic 
  West 
  Coast 
  fauna 
  which 
  prevails 
  south 
  

   of 
  that 
  range, 
  come 
  together, 
  and 
  are 
  to 
  a 
  certain 
  extent 
  intermingled. 
  Among 
  

   other 
  things, 
  I 
  would 
  call 
  attention 
  to 
  the 
  fact 
  that 
  the 
  color 
  of 
  the 
  eye 
  in 
  the 
  

   same 
  species 
  of 
  bird 
  is 
  not 
  invariably 
  the 
  same, 
  even 
  in 
  adults 
  of 
  the 
  same 
  sex, 
  a 
  

   point 
  which 
  has 
  doubtless 
  been 
  previously 
  noticed 
  by 
  ornithologists, 
  and 
  which 
  

   my 
  observations 
  on 
  several 
  species 
  confirm. 
  I 
  would 
  remark 
  that 
  the 
  region 
  

   visited 
  by 
  my 
  party 
  was 
  comprised 
  between 
  the 
  Shumagins 
  on 
  the 
  east 
  and 
  

   Unalashka 
  on 
  the 
  west, 
  among 
  the 
  islands. 
  

  

  Tinnunculus 
  sparverius, 
  Lin. 
  (13.) 
  

  

  A 
  specimen 
  of 
  this 
  species 
  was 
  killed 
  in 
  Unalashka, 
  in 
  the 
  fall 
  of 
  1871, 
  but 
  

   was 
  unfortunately 
  destroyed 
  before 
  the 
  skin 
  could 
  be 
  preserved. 
  It 
  may 
  be 
  

   considered 
  rare, 
  as 
  it 
  was 
  not 
  noticed 
  on 
  any 
  other 
  occasion. 
  

  

  Aquila 
  canadensis, 
  Lin. 
  (39.) 
  

  

  Obtained 
  at 
  Unga 
  Island, 
  in 
  the 
  spring 
  of 
  1872, 
  and 
  very 
  common 
  through- 
  

   out 
  the 
  islands, 
  as 
  far 
  west 
  as 
  Unalashka. 
  The 
  remarks 
  under 
  the 
  head 
  of 
  the 
  

   next 
  species 
  will 
  apply 
  to 
  this 
  one 
  also. 
  The 
  eye 
  was 
  orange-brown. 
  A 
  resi- 
  

   dent. 
  

  

  » 
  Printed 
  in 
  advance, 
  February 
  8th, 
  1873. 
  

  

  