﻿130 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  terior 
  profile 
  from 
  dorsal 
  origin 
  to 
  between 
  eyes 
  nearly 
  straight, 
  or 
  a 
  

   very 
  little 
  convex; 
  ventral 
  profile 
  curves 
  to 
  pelvic 
  insertions, 
  then 
  

   nearly 
  straight 
  backward 
  to 
  anal 
  origin; 
  body 
  compressed 
  pos- 
  

   teriorly; 
  greatest 
  depth 
  of 
  body 
  at 
  dorsal 
  origin; 
  eye 
  4:% 
  in 
  head, 
  

   1% 
  in 
  interorbital 
  space, 
  and 
  2% 
  in 
  postorbital 
  length 
  of 
  head; 
  

   posterior 
  nasal 
  opening 
  close 
  to 
  eye, 
  larger 
  than 
  the 
  anterior 
  one; 
  

   tip 
  of 
  lower 
  jaw 
  without 
  barbels 
  but 
  with 
  a 
  median 
  pit 
  contain- 
  

   ing 
  two 
  minute 
  pores 
  lying 
  in 
  this 
  porelike 
  depression, 
  and 
  laterally 
  

   two 
  pairs 
  of 
  pores 
  as 
  in 
  panamensis; 
  pores 
  and 
  lobes 
  on 
  front 
  of 
  snout 
  

   as 
  described 
  for 
  fanaineTisis 
  ; 
  anus 
  a 
  little 
  over 
  two-thirds 
  closer 
  to 
  

   anal 
  origin 
  than 
  to 
  pelvic 
  bases; 
  tip 
  of 
  filament 
  of 
  pelvic 
  soft 
  ray 
  

   reaching 
  to 
  anus 
  ; 
  pectoral 
  fins 
  reaching 
  to 
  opposite 
  anus 
  ; 
  gill 
  rakers 
  

   moderately 
  short, 
  the 
  longest 
  equal 
  to 
  diameter 
  of 
  pupil 
  ; 
  preopercular 
  

   spines 
  numbering 
  9 
  or 
  10, 
  none 
  hooked 
  downward, 
  those 
  dorsally 
  

   smaller 
  than 
  those 
  near 
  lower 
  angle 
  of 
  preopercle 
  ; 
  skull 
  with 
  the 
  usual 
  

   cavernous 
  spaces 
  as 
  found 
  in 
  other 
  genera 
  ; 
  least 
  depth 
  of 
  caudal 
  pe- 
  

   duncle 
  a 
  little 
  more 
  than 
  twice 
  in 
  its 
  length 
  ; 
  teeth 
  in 
  villif 
  orm 
  bands 
  in 
  

   both 
  jaws, 
  the 
  outer 
  row 
  of 
  upper 
  jaw 
  a 
  little 
  enlarged; 
  pseudo- 
  

   branchiae 
  well 
  developed; 
  scales 
  ctenoid; 
  lateral 
  line 
  broadly 
  curved 
  

   over 
  pectorals, 
  then 
  running 
  a 
  straight 
  course 
  along 
  midaxis 
  of 
  body 
  

   posteriorly, 
  and 
  extending 
  on 
  the 
  caudal 
  fin; 
  the 
  fourth 
  scale 
  row 
  

   below 
  lateral 
  line 
  anteriorly 
  is 
  the 
  first 
  one 
  continuing 
  to 
  base 
  of 
  caudal 
  

   fin; 
  second 
  dorsal 
  spine 
  only 
  slightly 
  heavier 
  (enlarged) 
  than 
  follow- 
  

   ing 
  spines 
  ; 
  second 
  dorsal 
  spine 
  \y^ 
  in 
  second 
  anal 
  spine 
  and 
  reaching 
  

   more 
  than 
  halfway 
  to 
  tips 
  of 
  third 
  or 
  fourth 
  dorsal 
  spines 
  and 
  1% 
  in 
  

   postorbital 
  length 
  of 
  head; 
  second 
  anal 
  spine 
  moderately 
  enlarged, 
  

   and 
  not 
  reaching 
  to 
  tips 
  of 
  soft 
  rays 
  ; 
  pelvic 
  spine 
  equal 
  to 
  length 
  of 
  

   second 
  dorsal 
  spine 
  ; 
  distal 
  margins 
  of 
  all 
  fins 
  a 
  little 
  rounded, 
  that 
  of 
  

   caudal 
  fin 
  double 
  truncate, 
  with 
  the 
  middle 
  rays 
  longest. 
  

  

  Color. 
  — 
  In 
  alcohol, 
  pale 
  brownish 
  above, 
  lighter 
  below; 
  anal 
  and 
  

   spiny 
  dorsal 
  dusky; 
  pelvic 
  soft 
  rays 
  dusky 
  distally, 
  the 
  filamentous 
  

   ray 
  white 
  ; 
  other 
  fins 
  very 
  pale 
  brownish 
  ; 
  peritoneum 
  with 
  numerous 
  

   black 
  pigment 
  cells; 
  the 
  types 
  are 
  not 
  well 
  preserved 
  and 
  the 
  colors 
  

   have 
  faded. 
  

  

  ReTYiarhs. 
  — 
  This 
  new 
  species 
  of 
  OpMoscion 
  may 
  be 
  separated 
  from 
  

   other 
  Atlantic 
  species 
  of 
  this 
  genus 
  by 
  the 
  foregoing 
  key. 
  

  

  Named 
  hrasiliensis 
  in 
  reference 
  to 
  the 
  country 
  along 
  whose 
  shores 
  

   the 
  types 
  were 
  collected. 
  

  

  OPHIOSCION 
  MICROPS 
  (Steindachner) 
  

  

  Corvina 
  microps 
  Steindachner. 
  Sitzb. 
  Akad. 
  Wiss. 
  Wien 
  [Ichth. 
  Notizen 
  No. 
  1], 
  

   vol. 
  49, 
  p. 
  6, 
  pi. 
  2, 
  fig. 
  2, 
  1864 
  (Guiaua). 
  

  

  I 
  have 
  made 
  measurements 
  on 
  two 
  specimens 
  from 
  Para 
  (M.C.Z. 
  

   No. 
  4581), 
  and 
  the 
  results 
  are 
  recorded 
  below 
  in 
  hundredths 
  of 
  the 
  

   standard 
  length. 
  Standard 
  lengths 
  in 
  millimeters, 
  66.3 
  and 
  60.3. 
  

  

  