﻿A 
  NEW 
  IlLMlHAMrillD 
  IISIL 
  — 
  MlLLEIi 
  

  

  187 
  

  

  dorsal 
  lin, 
  ami 
  position 
  of 
  pel 
  vies 
  — 
  used 
  by 
  many 
  writers 
  to 
  separate 
  

   Ueininunjihu.s 
  from 
  Ilf/porfunnphiu^. 
  The 
  nature 
  of 
  the 
  air 
  bladder 
  

   is 
  diflicult 
  to 
  discern 
  but 
  may 
  be 
  of 
  considerable 
  phylogenetic 
  impor- 
  

   tance; 
  the 
  form 
  of 
  the 
  sides 
  of 
  the 
  body 
  is 
  an 
  untrustworthy 
  character 
  

   because 
  it 
  is 
  frequently 
  rendered 
  impractical 
  by 
  preservation; 
  the 
  posi- 
  

   tion 
  and 
  shape 
  of 
  the 
  dorsjil 
  lin 
  is 
  not 
  so 
  distinctive 
  a 
  feature 
  as 
  is 
  the 
  

   ditVerence 
  in 
  the 
  basal 
  lenjiths 
  of 
  the 
  dorsal 
  anil 
  anal 
  fins; 
  and 
  the 
  

   position 
  of 
  the 
  pelvic 
  fins 
  is 
  useful 
  largely 
  for 
  specific 
  or 
  subspecific 
  

   separations. 
  

  

  Table 
  1. 
  — 
  Diaguustic 
  differences 
  bettceen 
  Hyporhamphus 
  unifaBciatue 
  and 
  Hemi- 
  

  

  ramphus 
  brasiliensis 
  ' 
  

  

  > 
  Characters 
  of 
  Ilvjwrhamphvi 
  confirmed 
  on 
  the 
  type 
  specimen 
  fll.P.N.At. 
  No. 
  8407) 
  of 
  the 
  genus, 
  H 
  

   trtciupid(Uus(,=-unifafdiiliu), 
  and 
  of 
  Jhniiramphun 
  on 
  "lopotyie.s" 
  (sjieeimens 
  from 
  Jamaica, 
  U.S.N.M. 
  

   No. 
  30077) 
  of 
  //. 
  briuUientiM. 
  

  

  The 
  new 
  species 
  described 
  below 
  is 
  the 
  lirst 
  to 
  be 
  definitely 
  recorded 
  

   from 
  fresh 
  vater 
  in 
  the 
  New 
  \\'oild. 
  It 
  apjieais 
  to 
  be 
  restricted 
  to 
  

   a 
  fluviatile 
  habitat, 
  for 
  a 
  numbei- 
  of 
  collections 
  of 
  halfl)eaks 
  along 
  the 
  

   west 
  coast 
  of 
  Mexico 
  in 
  the 
  n-gioii 
  where 
  the 
  new 
  species 
  was 
  dis- 
  

   cov«'red 
  ct^ntain 
  no 
  sj)ecies 
  identical 
  with 
  it. 
  

  

  I 
  name 
  this 
  distinctive 
  fish 
  />'/// 
  /.v,gcii 
  it 
  i\e 
  of 
  jxifrr 
  (father), 
  because 
  

   my 
  fathej-, 
  lljilj)h 
  (i. 
  Miller, 
  collected 
  the 
  It 
  types 
  hihI 
  only 
  known 
  

   spCH.imeii.s. 
  

  

  HVrOIUIAMI'HUS 
  rATKIS, 
  new 
  iprciri 
  

   I'LATK 
  11 
  

  

  Tyin'8. 
  — 
  The 
  holotype 
  (U.S.N.M. 
  N'o. 
  129950) 
  is 
  a 
  mature 
  aihilt 
  

   (presumably 
  a 
  female, 
  sec 
  below), 
  lis 
  iiim. 
  in 
  standard 
  length, 
  and 
  

   was 
  collected 
  on 
  May 
  4, 
  1912, 
  by 
  IJalpii 
  (J. 
  Miller 
  in 
  Rfo 
  del 
  Fuerte, 
  

   one-half 
  mile 
  above 
  the 
  town 
  (»f 
  Kl 
  Fuerte, 
  which 
  is 
  about 
  2(1 
  miles 
  

   northeast 
  of 
  San 
  lilas, 
  Sinola, 
  Mexico. 
  Tlie 
  1.'5 
  paratypes 
  (U.S.N.M. 
  

  

  