﻿188 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  m 
  

  

  No. 
  129957), 
  107 
  to 
  130 
  mm, 
  long, 
  wore 
  collected 
  with 
  the 
  holotype. 
  

   One 
  fish 
  in 
  the 
  lot, 
  a 
  specimen 
  118 
  mm. 
  in 
  standard 
  length, 
  is 
  tlie 
  only 
  

   individual 
  of 
  the 
  series 
  that 
  has 
  distinctly 
  larger 
  pectoral 
  and 
  pelvic 
  

   fins. 
  On 
  examination 
  it 
  was 
  found 
  to 
  be 
  a 
  ripe 
  male. 
  One 
  of 
  the 
  

   others, 
  a 
  specimen 
  109 
  nun. 
  long 
  with 
  short 
  pectorals 
  and 
  pelvics, 
  was 
  

   found 
  to 
  contain 
  eggs 
  in 
  various 
  stages 
  of 
  development, 
  some 
  of 
  them 
  

   apparently 
  fully 
  mature. 
  The 
  remainder 
  are 
  ])resumably 
  all 
  females. 
  

  

  Diagnosis. 
  — 
  A 
  Hyporhaiiypku^ 
  with 
  pelvic 
  fins 
  about 
  equidistant 
  

   between 
  caudal 
  base 
  and 
  gill 
  opening, 
  21 
  to 
  24 
  gill 
  rakers 
  on 
  lower 
  

   limb 
  of 
  first 
  arch, 
  with 
  a 
  relatively 
  long 
  mandible 
  (3.6 
  to 
  4.2 
  in 
  

   standard 
  length), 
  without 
  scales 
  on 
  dorsal 
  or 
  anal 
  fins, 
  and 
  without 
  the 
  

   fleshy 
  tip 
  of 
  the 
  mandible 
  red. 
  

  

  Desonption. 
  — 
  Bodj^ 
  rather 
  slender, 
  its 
  depth 
  8.0 
  to 
  9.6 
  in 
  standai'd 
  

   length, 
  little 
  compressed, 
  the 
  sides 
  rounded; 
  w-idth 
  of 
  body 
  in 
  depth 
  

   1.05 
  to 
  1.4; 
  head 
  4.5 
  to 
  5.0 
  in 
  standard 
  length; 
  mandible 
  (measured 
  

   from 
  tip 
  of 
  upper 
  jaw 
  to 
  end 
  of 
  bony 
  tip) 
  3.6 
  to 
  4.2 
  in 
  standard 
  

   length 
  and 
  0.7 
  to 
  0.9 
  in 
  head 
  length 
  (broken 
  in 
  one 
  specimen) 
  ; 
  snout 
  

  

  2.8 
  to 
  2,9 
  in 
  head 
  ; 
  orbit 
  4.0 
  to 
  4.3 
  in 
  head, 
  1.35 
  to 
  1.45 
  in 
  snout, 
  and 
  1.65 
  

   to 
  1.85 
  in 
  postorbital; 
  interorbital 
  3.8 
  to 
  4.1 
  in 
  head 
  and 
  1.55 
  to 
  1.7 
  

   in 
  postorbital; 
  length 
  of 
  preorbital 
  1.5 
  to 
  1.65 
  in 
  orbit; 
  depth 
  of 
  pre- 
  

   orbital 
  1.5 
  to 
  1,75 
  in 
  orbit; 
  width 
  of 
  nasal 
  fossa 
  1.85 
  to 
  2.15 
  in 
  orbit; 
  

   base 
  of 
  anal 
  fin 
  1.01 
  to 
  1.08 
  in 
  base 
  of 
  dorsal 
  fin; 
  pectoral 
  short, 
  8.4 
  to 
  

   9.35 
  in 
  standard 
  length 
  in 
  females 
  (7.9 
  in 
  the 
  male) 
  and 
  1.75 
  to 
  1.95 
  

   in 
  head 
  (1.65 
  in 
  male) 
  ; 
  pelvic 
  2.7 
  to 
  3.0 
  in 
  head 
  in 
  females 
  (2.25 
  in 
  

   male) 
  ; 
  midcaudal 
  rays 
  (measured 
  from 
  midbase 
  of 
  caudal 
  fin 
  to 
  tip 
  

   of 
  shortest 
  middle 
  ray 
  or 
  rays) 
  8.4 
  to 
  9.3 
  in 
  standard 
  length, 
  1.7 
  to 
  

  

  1.9 
  in 
  head, 
  and 
  2.1 
  to 
  2.4 
  times 
  the 
  length 
  of 
  the 
  orbit. 
  

  

  The 
  fin 
  rays 
  vary 
  in 
  number 
  as 
  follows: 
  Dorsal 
  13 
  to 
  15, 
  usually 
  14; 
  

   anal 
  15 
  or 
  16. 
  usually 
  16; 
  pectorals 
  10-10, 
  10-11, 
  or 
  11-11, 
  ahnost 
  al- 
  

   ways 
  10-10; 
  pelvics 
  always 
  6-6. 
  I 
  depart 
  from 
  my 
  usual 
  method 
  in 
  

   counting 
  the 
  rays 
  of 
  the 
  dorsal 
  and 
  anal 
  fins 
  and 
  regard 
  every 
  element 
  

   as 
  a 
  separate 
  ray, 
  because 
  this 
  procedure 
  has 
  been 
  followed 
  by 
  virtually 
  

   all 
  students 
  of 
  this 
  group 
  of 
  fishes. 
  Without 
  exception 
  the 
  first 
  two 
  

   rays 
  of 
  the 
  doi*sal 
  fin 
  are 
  unbranched, 
  and 
  the 
  first 
  two 
  rays 
  of 
  the 
  

   anal 
  fin 
  are 
  also 
  simple 
  except 
  in 
  two 
  specimens 
  in 
  which 
  the 
  first 
  

   three 
  rays 
  are 
  unbranched. 
  

  

  The 
  gill 
  rakers 
  on 
  the 
  lower 
  limb 
  of 
  the 
  first 
  gill 
  arch 
  (counted 
  on 
  

   both 
  sides) 
  vary 
  from 
  21 
  to 
  24. 
  

  

  The 
  lateral 
  series 
  scales 
  (counted 
  from 
  upper 
  angle 
  of 
  gill 
  opening 
  

   to 
  caudal 
  base) 
  number 
  about 
  53 
  to 
  59, 
  usually 
  55 
  to 
  57; 
  an 
  accurate 
  

   count 
  is 
  difficult 
  to 
  obtain 
  because 
  the 
  scales 
  are 
  largely 
  missing 
  from 
  

   the 
  sides. 
  

  

  The 
  pelvic 
  fins 
  lie 
  about 
  equidistant 
  between 
  the 
  base 
  of 
  the 
  caudal 
  

   fin 
  and 
  the 
  gill 
  opening, 
  varying 
  between 
  the 
  pectoral 
  base 
  and 
  the 
  

   middle 
  of 
  the 
  opercle. 
  The 
  dorsal 
  fin 
  varies 
  in 
  position 
  from 
  equi- 
  

  

  