﻿Swifts 
  and 
  Humming-birds. 
  93 
  

  

  Cypseli. 
  Trochili. 
  

  

  30. 
  The 
  entire 
  tomjue 
  or 
  hyoidean 
  30. 
  The 
  entire 
  hjoidean 
  appara- 
  

   apparatus 
  essentially 
  differing 
  but 
  tus 
  characteristic, 
  being 
  utterly 
  dif- 
  

   very 
  little 
  from 
  the 
  Swallows. 
  ferent 
  from 
  the 
  Swifts, 
  and 
  the 
  

  

  tongue 
  capable 
  of 
  protrusion, 
  with 
  

   a 
  mechanism 
  much 
  as 
  is 
  possessed 
  

   by 
  the 
  Pici. 
  

  

  31. 
  Carefully 
  comparing 
  the 
  bbain 
  in 
  several 
  specimens 
  of 
  Humming- 
  

   birds 
  of 
  different 
  species 
  and 
  genera 
  with 
  the 
  brains 
  of 
  Swifts 
  and 
  Swal- 
  

   lows, 
  I 
  find 
  that, 
  although 
  in 
  all 
  three 
  groups 
  the 
  brain 
  and 
  its 
  parts 
  are 
  

   strictly 
  fashioned 
  upon 
  the 
  true 
  avian 
  plan, 
  in 
  the 
  Swifts 
  and 
  Swallows 
  

   its 
  general 
  and 
  special 
  form 
  is 
  far 
  more 
  alike 
  than 
  it 
  is 
  when 
  we 
  compare 
  

   it 
  with 
  the 
  brain 
  in 
  a 
  Trochilus. 
  This 
  we 
  might 
  naturally 
  have 
  looked 
  

   for, 
  since 
  the 
  inner 
  shape 
  of 
  the 
  cranial 
  casket 
  in 
  the 
  Ilumming-bird 
  is 
  

   very 
  different 
  from 
  the 
  corresponding 
  cavity 
  in 
  the 
  Cypseli 
  and 
  Hirundines 
  

   (Journ. 
  Linn. 
  Soc. 
  Loud. 
  vol. 
  xx. 
  p. 
  376). 
  This 
  paragraph 
  I 
  also 
  quote 
  

   from 
  my 
  Linnean 
  memoir, 
  of 
  which 
  my 
  friend 
  Mr. 
  J. 
  E. 
  Harting, 
  F.Z.S., 
  

   was 
  good 
  enough 
  to 
  write 
  me 
  in 
  a 
  valued 
  letter 
  under 
  date 
  of 
  August 
  

   20th, 
  1889, 
  as 
  follows 
  : 
  — 
  ^" 
  I 
  have 
  read 
  this 
  memoir 
  very 
  carefully 
  with 
  

   great 
  satisfaction, 
  and 
  regard 
  it 
  as 
  a 
  most 
  important 
  contribution 
  to 
  

   the 
  Anatomy 
  of 
  Birds. 
  I 
  am 
  the 
  more 
  pleased 
  with 
  it 
  because 
  I 
  have 
  

   always 
  held 
  that 
  the 
  case 
  for 
  the 
  relationship 
  between 
  the 
  Cypseli 
  and 
  

   Trochili 
  has 
  been 
  overstated, 
  not 
  to 
  say 
  exaggerated, 
  and 
  I 
  am 
  accord- 
  

   ingly 
  glad 
  to 
  find 
  that 
  the 
  results 
  of 
  your 
  researches 
  support 
  entirely 
  and 
  

   conclusively 
  the 
  view 
  I 
  have 
  hitherto 
  maintained." 
  

  

  To 
  sum 
  up 
  as 
  far 
  as 
  we 
  have 
  gone, 
  it 
  would 
  seem 
  well 
  to 
  

   state 
  here 
  that 
  in 
  the 
  case 
  of 
  a 
  typical 
  Swift 
  and 
  a 
  Hum- 
  

   ming-bird 
  the 
  anatomy 
  of 
  the 
  entire 
  head 
  of 
  the 
  one 
  

   is 
  as 
  essentially 
  different 
  from 
  that 
  of 
  the 
  other 
  as 
  it 
  is 
  pos- 
  

   sible 
  for 
  two 
  carinate 
  birds 
  to 
  be 
  in 
  such 
  particulars. 
  When 
  

   I 
  say 
  the 
  anatomy 
  of 
  the 
  head 
  I 
  mean 
  the 
  entire 
  face 
  and 
  

   associated 
  structures 
  : 
  the 
  pterylosis 
  ; 
  special 
  organs, 
  as 
  the 
  

   tongue, 
  salivary 
  glands, 
  air-passages, 
  &c. 
  ; 
  the 
  muscular 
  

   nervous, 
  and 
  vascular 
  systems 
  ; 
  the 
  skull; 
  and 
  the 
  character 
  

   of 
  the 
  plumage. 
  I 
  challenge 
  any 
  fair-minded 
  capable 
  orni- 
  

   thologist 
  to 
  come 
  to 
  any 
  other 
  conclusion 
  after 
  he 
  has 
  

   examined 
  and 
  compared 
  a 
  sufficient 
  amount 
  of 
  material. 
  

  

  Cypseli 
  Trochili 
  

  

  i^Chcetura 
  pelagica). 
  (Trochilus 
  rufus). 
  

  

  32. 
  The 
  last 
  caudal 
  vertebra 
  is 
  32. 
  The 
  last 
  caudal 
  vertebra 
  is 
  

  

  the 
  35th. 
  the 
  32ud. 
  

  

  