﻿132 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  duncle 
  25.1 
  (25.1 
  ; 
  24.3 
  ; 
  25.4) 
  ; 
  least 
  depth 
  of 
  caudal 
  peduncle 
  10.7 
  

   (9.88; 
  10.9; 
  10.9) 
  ; 
  length 
  of 
  base 
  of 
  second 
  dorsal 
  fin 
  32.6 
  (32.5; 
  32.1; 
  

   32.4) 
  ; 
  length 
  of 
  base 
  of 
  anal 
  fin 
  11.0 
  (11.6; 
  11.7; 
  11.2) 
  ; 
  length 
  of 
  long- 
  

   est 
  dorsal 
  spine 
  18.6 
  (21.1; 
  18.5; 
  19.3) 
  ; 
  length 
  of 
  longest 
  soft 
  dorsal 
  

   ray 
  — 
  (13.1; 
  —; 
  — 
  ; 
  13.2) 
  ; 
  longest 
  soft 
  anal 
  ray 
  16.1 
  (17.0; 
  — 
  ; 
  14.7) 
  ; 
  

   length 
  of 
  second 
  anal 
  spine 
  16.3 
  (17.4; 
  — 
  ; 
  15.8) 
  ; 
  longest 
  pectoral 
  fin 
  

   ray 
  25.2 
  (23.1; 
  22.7; 
  25.2); 
  longest 
  soft 
  pelvic 
  ray 
  13.0 
  (18.6; 
  12.3; 
  

   13.9); 
  length 
  of 
  pelvic 
  spine 
  9.32 
  (11.5; 
  8.34; 
  8.85); 
  longest 
  or 
  

   middle 
  caudal 
  fin 
  rays 
  25.9 
  (26.9; 
  22.7; 
  25,5) 
  ; 
  distance 
  from 
  tip 
  of 
  

   snout 
  to 
  dorsal 
  origin 
  37.1 
  (35.9; 
  38.5; 
  37.7); 
  snout 
  to 
  anal 
  origin 
  

   67.2 
  (65.4; 
  65.1; 
  66.2); 
  snout 
  to 
  pectoral 
  insertion 
  32.6 
  (31.1; 
  32.2; 
  

   31.6) 
  ; 
  snout 
  to 
  pelvic 
  insertion 
  32.6 
  (30.5; 
  30.6; 
  80.9) 
  ; 
  length 
  of 
  long- 
  

   est 
  gill 
  rakers 
  on 
  first 
  gill 
  arch 
  1.58 
  (2.76; 
  1.66; 
  3.22). 
  

  

  Figure 
  7. 
  — 
  Opkioscion 
  venezuelae, 
  new 
  species: 
  Holotype 
  (U.S.N.M. 
  No. 
  121749). 
  

  

  The 
  following 
  counts 
  were 
  made, 
  respectively 
  : 
  Dorsal 
  rays 
  XI-I, 
  21 
  

   (XI-I, 
  22; 
  XII-I, 
  21; 
  XI-I, 
  21; 
  XI-I, 
  21; 
  XI-I, 
  21; 
  XI-I, 
  22); 
  

   anal 
  rays 
  on 
  all 
  types 
  II, 
  8; 
  pectoral 
  rays 
  ii, 
  17-ii, 
  17 
  (ii, 
  16; 
  ii, 
  

   l7-ii, 
  17; 
  ii, 
  17-ii, 
  17; 
  ii, 
  16) 
  ; 
  pelvics 
  always 
  I, 
  5; 
  number 
  of 
  vertical 
  

   scale 
  rows 
  above 
  lateral 
  line 
  52 
  (53; 
  52; 
  54) 
  ; 
  scales 
  from 
  dorsal 
  origin 
  

   to 
  lateral 
  line 
  6 
  ( 
  — 
  ; 
  6; 
  6) 
  and 
  from 
  base 
  of 
  first 
  soft 
  dorsal 
  ray 
  to 
  

   lateral 
  line 
  6 
  ( 
  — 
  ; 
  6; 
  6) 
  ; 
  scales 
  from 
  lateral 
  line 
  to 
  anal 
  origin 
  8 
  ( 
  — 
  ; 
  

   8; 
  8) 
  ; 
  scales 
  in 
  a 
  zigzag 
  row 
  around 
  the 
  caudal 
  peduncle 
  19 
  ( 
  — 
  ; 
  

   19; 
  19) 
  ; 
  number 
  of 
  gill 
  rakers 
  on 
  first 
  gill 
  arch 
  9+1+16 
  ( 
  — 
  ; 
  10+1 
  

   + 
  18; 
  10 
  + 
  1 
  + 
  18; 
  9 
  + 
  1 
  + 
  16; 
  10 
  + 
  1 
  + 
  16). 
  

  

  Head 
  depressed 
  forward 
  but 
  rounded 
  dorsallj^, 
  the 
  interorbital 
  space 
  

   convex, 
  broad, 
  about 
  equal 
  to 
  the 
  snout; 
  body 
  compressed; 
  anterior 
  

   profile 
  nearly 
  straight 
  but 
  the 
  dorsal 
  contour 
  curved, 
  the 
  ventral 
  con- 
  

   tour 
  but 
  slightly 
  curved 
  backward 
  to 
  anus; 
  back 
  highest 
  at 
  base 
  of 
  

   spiny 
  dorsal 
  fin 
  ; 
  eye 
  about 
  2% 
  in 
  postorbital 
  length 
  of 
  head, 
  14^ 
  in 
  

   interorbital 
  space; 
  posterior 
  nasal 
  opening 
  rounded, 
  slightlj^ 
  larger 
  

   than 
  the 
  anterior 
  one; 
  tip 
  of 
  lower 
  jaw 
  without 
  barbels; 
  anal 
  origin 
  

   equidistant 
  between 
  pelvic 
  insertion 
  and 
  midcaudal 
  fin 
  base; 
  pelvic 
  

  

  