﻿588 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  i03 
  

  

  P. 
  Dro._ 
  /'^P^- 
  

  

  Pect. 
  tend.. 
  

  

  Ext. 
  meta« 
  

  

  Figure 
  69. 
  — 
  Chrysococcyx 
  cupreus. 
  Anconal 
  view 
  of 
  left 
  arm 
  and 
  forearm 
  to 
  show 
  the 
  

   structure 
  and 
  relationships 
  of 
  M. 
  tensor 
  patagii 
  brevis. 
  Explanation 
  of 
  symbols: 
  Del., 
  

   deltoideus 
  major; 
  Ext. 
  dig., 
  extensor 
  digitorum 
  communis; 
  Ext. 
  meta., 
  extensor 
  meta- 
  

   carpi 
  radialis; 
  P. 
  pro., 
  pars 
  propatagialis, 
  pectoralis 
  superficialis; 
  Pect. 
  tend., 
  accessory 
  

   tendon 
  of 
  pectoralis 
  superficialis; 
  Tpb., 
  tensor 
  patagii 
  brevis; 
  Tpl., 
  tensor 
  patagii 
  longus. 
  

  

  The 
  structure 
  of 
  M. 
  tensor 
  patagii 
  brevis 
  (fig. 
  69) 
  is 
  similar 
  in 
  the 
  

   three 
  genera 
  and 
  exhibits 
  some 
  differences 
  from 
  that 
  found 
  in 
  other 
  

   cuckoos 
  studied. 
  In 
  Lamfromorpha 
  caprius 
  the 
  belly 
  is 
  14 
  mm. 
  long 
  

   and 
  5 
  mm. 
  in 
  maximum 
  width. 
  The 
  distal 
  end 
  of 
  its 
  fleshy 
  belly 
  has 
  

   no 
  relationship 
  to 
  the 
  tendon 
  of 
  M. 
  tensor 
  patagii 
  longus. 
  A 
  strong 
  flat 
  

   tendon 
  (0.5 
  nun. 
  wide) 
  arises 
  from 
  the 
  dense 
  fascial 
  envelope 
  which 
  

   surrounds 
  the 
  insertion 
  of 
  M. 
  pectoralis 
  superficialis, 
  and 
  fuses 
  with 
  

   the 
  tendon 
  of 
  M. 
  tensor 
  patagii 
  brevis. 
  About 
  5 
  mm. 
  distal 
  to 
  the 
  

   ectepicondylar 
  process 
  of 
  the 
  humerus, 
  part 
  of 
  the 
  tendon 
  of 
  M. 
  tensor 
  

   patagii 
  brevis 
  fuses 
  with 
  the 
  superficial 
  surface 
  of 
  M. 
  extensor 
  meta- 
  

   carpi 
  radialis. 
  From 
  this 
  region 
  of 
  fusion, 
  a 
  strong 
  tendon 
  passes 
  

   proximad 
  to 
  attach 
  to 
  the 
  ectepicondylar 
  process; 
  distal 
  to 
  the 
  area 
  

   of 
  fusion, 
  the 
  tendon 
  expands 
  and 
  gives 
  origin 
  on 
  both 
  its 
  superficial 
  

   and 
  deep 
  surfaces 
  to 
  fleshy 
  fibers 
  of 
  M. 
  extensor 
  metacarpi 
  radialis. 
  

   Posterior 
  to 
  the 
  area 
  of 
  fusion, 
  the 
  tendon 
  of 
  M. 
  tensor 
  patagii 
  brevis 
  

   bifurcates 
  : 
  one 
  branch 
  fuses 
  with 
  the 
  superficial 
  surface 
  of 
  M. 
  exten- 
  

   sor 
  digitorum 
  communis 
  and 
  attaches 
  to 
  the 
  humerus 
  with 
  that 
  

   muscle 
  ; 
  the 
  second 
  branch 
  fans 
  out, 
  extends 
  nearly 
  the 
  entire 
  length 
  

   of 
  the 
  ulna, 
  attaches 
  to 
  the 
  bases 
  of 
  the 
  secondaries, 
  and 
  fuses 
  with 
  the 
  

   antibrachial 
  fascia. 
  This 
  muscle 
  shows 
  the 
  same 
  relationships 
  in 
  the 
  

   other 
  species, 
  but 
  measurements 
  are 
  slightly 
  smaller 
  in 
  them. 
  In 
  its 
  

   insertion, 
  M. 
  tensor 
  patagii 
  brevis 
  is 
  similar 
  to 
  that 
  in 
  Coccyzus 
  

   erythropthalmus. 
  

  

  