﻿Sivifts 
  and 
  Hiiininhig-blrds. 
  

  

  97 
  

  

  pig.i. 
  

  

  Fio;. 
  3. 
  

  

  Fie-. 
  5. 
  

  

  Fig. 
  

  

  Fig. 
  4. 
  

  

  Fig. 
  6. 
  

  

  Compaiisou 
  of 
  tlie 
  Humeri 
  of 
  the 
  Swallow, 
  Swift, 
  and 
  Uuiuiuing-bird. 
  

   (P. 
  Z. 
  S. 
  1886, 
  p. 
  502.) 
  

  

  Fig. 
  1. 
  Anconal 
  aspect 
  of 
  left 
  humerus 
  of 
  Tachycineta 
  thalassinn. 
  X 
  3. 
  

  

  Fig. 
  2. 
  Palmar 
  aspect 
  of 
  the 
  bone 
  shown 
  in 
  fig. 
  1. 
  X 
  3. 
  

  

  Fig. 
  3. 
  Anconal 
  aspect 
  of 
  the 
  left 
  humerus 
  of 
  Microjms 
  melanoleucus. 
  

  

  x4. 
  

   Fig. 
  4. 
  Palmar 
  aspect 
  of 
  the 
  bone 
  shown 
  in 
  fig. 
  3. 
  X 
  4. 
  

   Fig. 
  5. 
  Anconal 
  aspect 
  of 
  the 
  left 
  humerus 
  of 
  Tvochihis 
  alexandri. 
  x8. 
  

   Fig. 
  6. 
  Palmar 
  aspect 
  of 
  the 
  bone 
  shown 
  in 
  fig. 
  5. 
  x8. 
  

  

  By 
  " 
  anconal 
  " 
  I 
  mean 
  that 
  side 
  of 
  the 
  bone 
  which 
  is 
  next 
  to 
  the 
  body 
  

   of 
  the 
  bird, 
  and 
  the 
  reverse 
  of 
  this 
  is 
  the 
  " 
  palmar 
  " 
  aspect. 
  All 
  these 
  

   figures 
  are 
  drawn 
  from 
  the 
  specimens 
  by 
  the 
  author, 
  and 
  />./. 
  calls 
  atten- 
  

   tion 
  to 
  the 
  pneumatic 
  foi^sa. 
  

  

  SKU. 
  VI. 
  VOL. 
  V. 
  H 
  

  

  