﻿206 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  It 
  is 
  quite 
  damp 
  where 
  the 
  onychophores 
  are 
  found. 
  There 
  were 
  not 
  

   many 
  rocks 
  or 
  boards 
  on 
  the 
  ground, 
  which 
  may 
  account 
  for 
  the 
  

   presence 
  of 
  these 
  creatures 
  under 
  the 
  coconut-palm 
  sheaths. 
  

  

  From 
  Barro 
  Colorado 
  Island 
  three 
  species 
  are 
  now 
  known, 
  Oroperi- 
  

   patus 
  corradi, 
  Macroperipatus 
  geayi, 
  and 
  Epiperipatus 
  brasiliensis 
  var. 
  

   vagans. 
  

  

  Dr. 
  Waldo 
  L. 
  Schmitt 
  has 
  found 
  onychophores 
  in 
  the 
  dry 
  season 
  

   under 
  rocks 
  where 
  the 
  soil 
  remained 
  moist 
  in 
  a 
  dry 
  stream 
  bed, 
  and 
  

   0. 
  eisenii 
  and 
  E. 
  biolleyi 
  have 
  been 
  found 
  under 
  stones 
  by 
  the 
  sides 
  of 
  

   streams. 
  One 
  species 
  has 
  been 
  found 
  in 
  bromelias 
  in 
  Central 
  America, 
  

   though 
  not 
  in 
  Panama. 
  

  

  As 
  the 
  records 
  of 
  the 
  species 
  of 
  Onychophora 
  known 
  from 
  Panama 
  

   and 
  the 
  Canal 
  Zone 
  are 
  widely 
  scattered, 
  it 
  has 
  seemed 
  worth 
  while 
  to 
  

   include 
  all 
  of 
  them 
  herein, 
  together 
  with 
  a 
  key 
  for 
  their 
  identification 
  

   and 
  a 
  bibliography. 
  

  

  KEY 
  TO 
  THE 
  ONYCHOPHORA 
  OCCURRING 
  IN 
  PANAMA 
  AND 
  THE 
  

  

  CANAL 
  ZONE 
  

  

  a*. 
  Urinary 
  papilla 
  of 
  legs 
  IV 
  and 
  V 
  included 
  in 
  third 
  arc 
  of 
  ambulatory 
  pad 
  ; 
  

  

  4 
  foot 
  papillae, 
  2 
  on 
  each 
  side 
  of 
  foot. 
  

  

  51. 
  Urinary 
  papillae 
  of 
  legs 
  IV 
  and 
  V 
  dividing 
  third 
  arc 
  into 
  2 
  segments 
  of 
  

  

  which 
  the 
  posterior 
  is 
  smaller 
  than 
  the 
  anterior, 
  though 
  much 
  broader 
  

  

  than 
  long; 
  urinary 
  tubercle 
  wholly 
  united 
  to 
  anterior 
  portion 
  of 
  arc; 
  

  

  26-29 
  (usually 
  28) 
  pairs 
  of 
  legs 
  in 
  females, 
  24-25 
  (usually 
  25) 
  in 
  males; 
  

  

  length 
  14-39 
  mm 
  Oroperipatus 
  corradi 
  

  

  b^. 
  Urinary 
  papillae 
  of 
  legs 
  IV 
  and 
  V 
  dividing 
  third 
  arc 
  into 
  2 
  segments 
  of 
  

   which 
  the 
  posterior 
  is 
  very 
  small, 
  scarcely 
  broader 
  than 
  long; 
  urinary 
  

   tubercle 
  more 
  or 
  less 
  independent 
  of 
  anterior 
  segment; 
  27-29 
  (usually 
  

   28) 
  pairs 
  of 
  legs 
  in 
  females, 
  23-26 
  (usually 
  25) 
  in 
  males; 
  length 
  13-70 
  mm. 
  

  

  Oroperipatus 
  eisenii 
  

  

  a^. 
  Urinary 
  papilla 
  on 
  legs 
  IV 
  and 
  V 
  below 
  third 
  arc, 
  deeply 
  indenting 
  fourth; 
  

  

  3 
  foot 
  papillae, 
  2 
  anterior 
  and 
  1 
  posterior. 
  

  

  ¥. 
  Papillae 
  of 
  dorsal 
  surface 
  each 
  on 
  an 
  oblong 
  or 
  squarish 
  base, 
  the 
  oblong 
  

  

  bases 
  elongated 
  in 
  direction 
  of 
  long 
  axis 
  of 
  animal; 
  30-33 
  pairs 
  of 
  legs 
  

  

  in 
  females, 
  28 
  in 
  males; 
  length 
  27-100 
  mm 
  Macroperipatus 
  geayi 
  

  

  ¥. 
  Papillae 
  of 
  dorsal 
  surface 
  on 
  highly 
  irregular 
  bases, 
  the 
  plications 
  usually 
  

   appearing 
  undivided. 
  

   c^ 
  Principal 
  papillae 
  of 
  dorsal 
  surface 
  of 
  very 
  different 
  sizes, 
  some 
  very 
  

   conspicuous 
  and 
  cylindrical, 
  others 
  smaller 
  and 
  conical, 
  usually 
  3 
  of 
  

   the 
  smaller 
  between 
  2 
  of 
  the 
  larger; 
  papillae 
  separated 
  by 
  rather 
  broad 
  

   intervals 
  in 
  which 
  accessory 
  papillae 
  occur; 
  males 
  usually 
  with 
  crural 
  

   tubercles 
  on 
  more 
  than 
  2 
  pregenital 
  pairs 
  of 
  legs; 
  29-30 
  (usually 
  30) 
  

  

  pairs 
  of 
  legs 
  in 
  females; 
  length 
  29-52 
  mm 
  Peripatus 
  ruber 
  

  

  c*. 
  Principal 
  papillae 
  of 
  dorsal 
  surface 
  all 
  of 
  same 
  type, 
  passing 
  through 
  all 
  

   intermediate 
  stages 
  from 
  large 
  to 
  small; 
  papillae 
  closely 
  set, 
  though 
  

   with 
  occasional 
  accessory 
  papillae 
  between 
  them; 
  in 
  small 
  individuals 
  

   some 
  of 
  the 
  papillae 
  predominant; 
  crural 
  tubercles 
  of 
  males 
  on 
  2 
  

   pregenital 
  pairs 
  of 
  legs. 
  

   dK 
  On 
  dorsal 
  surface 
  above 
  each 
  pair 
  of 
  legs 
  a 
  few 
  short 
  incomplete 
  plica- 
  

   tions, 
  tapering 
  to 
  a 
  point 
  on 
  each 
  side 
  intercalated 
  between 
  the 
  others. 
  

  

  