﻿136 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.98 
  

  

  caudal 
  fin 
  ; 
  the 
  fifth 
  scale 
  row 
  below 
  lateral 
  line 
  anteriorly 
  is 
  the 
  first 
  

   one 
  continuous 
  to 
  base 
  of 
  caudal 
  fin 
  ; 
  second 
  dorsal 
  spine 
  enlarged, 
  its 
  

   length 
  ly^ 
  in 
  second 
  anal 
  spine, 
  and 
  reaching 
  more 
  than 
  halfway 
  to 
  

   tip 
  of 
  third 
  or 
  fourth 
  dorsal 
  spine; 
  second 
  dorsal 
  spine 
  1% 
  in 
  post- 
  

   orbital 
  length 
  of 
  head; 
  second 
  anal 
  spine 
  enlarged, 
  not 
  reaching 
  to 
  

   tips 
  of 
  soft 
  anal 
  rays 
  ; 
  pelvic 
  spine 
  a 
  trifle 
  shorter 
  than 
  second 
  dorsal 
  

   spine 
  ; 
  distal 
  margins 
  of 
  dorsal, 
  anal, 
  and 
  of 
  paired 
  fins 
  a 
  little 
  rounded, 
  

   that 
  of 
  the 
  caudal 
  fin 
  double 
  truncate, 
  the 
  midcaudal 
  rays 
  longest. 
  

  

  Color. 
  — 
  In 
  alcohol 
  the 
  body 
  is 
  brownish 
  everywhere, 
  paler 
  brown 
  

   ventrally; 
  paired 
  fins 
  and 
  anal 
  and 
  dorsal 
  fins 
  blackish, 
  with 
  the 
  

   first 
  spine 
  in 
  these 
  fins, 
  except 
  pectorals, 
  whitish 
  ; 
  tip 
  of 
  first 
  soft 
  ray 
  

   in 
  pelvic 
  fins 
  white, 
  especially 
  the 
  filament 
  ; 
  soft 
  dorsal 
  and 
  caudal 
  fins 
  

   brownish 
  with 
  numerous 
  black 
  pigment 
  cells; 
  undersides 
  of 
  head 
  

   and 
  breast 
  pale 
  ; 
  lips 
  pale 
  ; 
  peritoneum 
  white. 
  

  

  In 
  the 
  smaller 
  specimens 
  of 
  this 
  species 
  the 
  coloration 
  of 
  the 
  median 
  

   fins 
  differs 
  from 
  the 
  larger 
  ones. 
  At 
  a 
  standard 
  length 
  of 
  24 
  mm. 
  

   the 
  caudal 
  fin 
  is 
  white, 
  except 
  for 
  a 
  few 
  scattered 
  brown 
  pigment 
  cells 
  

   located 
  near 
  the 
  center 
  of 
  the 
  fin, 
  the 
  caudal 
  fin 
  base 
  is 
  abruptly 
  dark 
  

   brown 
  with 
  the 
  pigment 
  extending 
  backward 
  a 
  little 
  on 
  middle 
  rays 
  ; 
  

   the 
  anal 
  and 
  dorsal 
  fins 
  have 
  a 
  brownish 
  band 
  extending 
  across 
  rays, 
  

   with 
  the 
  margin 
  of 
  the 
  fins 
  white, 
  and 
  below 
  this 
  bar 
  is 
  another 
  white 
  

   area 
  separating 
  the 
  brownish 
  base 
  of 
  these 
  fins 
  from 
  the 
  brown 
  band 
  ; 
  

   these 
  fins 
  gradually 
  fill 
  in 
  with 
  brown 
  pigment 
  so 
  that 
  at 
  42 
  mm. 
  the 
  

   fins 
  are 
  plain 
  brownish. 
  

  

  Bemarks. 
  — 
  This 
  new 
  species 
  may 
  be 
  separated 
  from 
  other 
  Atlantic 
  

   species 
  of 
  Ophioscion 
  by 
  the 
  key 
  and 
  traces 
  down 
  to 
  O. 
  adustus 
  in 
  

   Meek 
  and 
  Hildebrand's 
  key 
  to 
  the 
  species 
  of 
  Ophioscion 
  in 
  their 
  

   "Marine 
  Fishes 
  of 
  Panama" 
  (vol. 
  2, 
  p. 
  636, 
  1925) 
  . 
  

  

  Named 
  panamcnsis 
  in 
  reference 
  to 
  the 
  region 
  where 
  it 
  has 
  been 
  

   collected. 
  

  

  OPHIOSCION 
  NASO 
  (Jordan) 
  

  

  Stelliferus 
  naso 
  Jordan, 
  in 
  Jordan 
  and 
  Eigenmann, 
  Rep. 
  U. 
  S. 
  Comm. 
  Fish 
  and 
  

   Fisheries 
  for 
  1S86, 
  vol. 
  14, 
  p. 
  395, 
  1889 
  (Cachiura, 
  Brazil). 
  

  

  I 
  have 
  made 
  measurements 
  on 
  two 
  of 
  the 
  types 
  (M.C.Z. 
  No. 
  4583) 
  

   from 
  Cachiura, 
  and 
  the 
  results 
  are 
  recorded 
  below 
  in 
  hundredths 
  

   of 
  the 
  standard 
  length. 
  Standard 
  lengths 
  in 
  millimeters, 
  75.5 
  and 
  

   70.5. 
  

  

  Length 
  of 
  head 
  31.1 
  and 
  30.5; 
  greatest 
  depth 
  of 
  body 
  31.8 
  and 
  28.4; 
  

   diameter 
  of 
  eye 
  8.60 
  and 
  9.22 
  ; 
  length 
  of 
  snout 
  9.27 
  and 
  9.22 
  ; 
  tip 
  of 
  pre- 
  

   maxillaries 
  to 
  rear 
  of 
  maxillary 
  10.1 
  and 
  9.78 
  ; 
  least 
  width 
  of 
  preorbital 
  

   3.97 
  and 
  3.97; 
  postorbital 
  length 
  of 
  head 
  15.9 
  and 
  15.6; 
  least 
  width 
  

   of 
  bony 
  interorbital 
  9.14 
  and 
  9.22 
  ; 
  length 
  of 
  caudal 
  peduncle 
  (base 
  of 
  

   last 
  anal 
  ray 
  to 
  midbase 
  of 
  caudal 
  fin) 
  25.0 
  and 
  24.4; 
  least 
  depth 
  of 
  

   caudal 
  fin 
  10.6 
  and 
  10.8; 
  length 
  of 
  base 
  of 
  second 
  dorsal 
  fin 
  31.8 
  and 
  

  

  