﻿PROCEEDINGS 
  OF 
  THE 
  UNITED 
  STATES 
  NATIONAL 
  MUSEUM 
  

  

  issited 
  5' 
  J5(V 
  '^■^ 
  0?'l^i 
  by 
  the 
  

   SMITHSONIAN 
  INSTITUTION 
  

  

  L'. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  Vol. 
  % 
  

  

  Wuhington 
  : 
  I94S 
  

  

  No. 
  3195 
  

  

  HYPOKIIAMPIirs 
  l^VTRIS. 
  A 
  NEW 
  SPECIES 
  OF 
  HEMI- 
  

   KAMPIIID 
  FISH 
  FUO^r 
  SIXALOA. 
  MEXICO, 
  WITH 
  AN 
  

   AXALYSIS 
  OF 
  THE 
  OEXEKIC 
  CHARACTERS 
  OF 
  HYPO- 
  

   RHAMPH 
  US 
  AND 
  HEMIRAMPHUS 
  

  

  Hv 
  RoilIIfT 
  R. 
  MlI.LKR 
  

  

  Till. 
  |i.iii<iiy 
  of 
  oui- 
  kiiowU'tl^^c 
  of 
  tlu' 
  fresh-Av 
  titer 
  fish 
  fauna 
  of 
  

   MortliWfstiTii 
  M('.\i<-o 
  is 
  cNident 
  from 
  the 
  novelties 
  which 
  Ralph 
  G. 
  

   Milh-r 
  has 
  c'<tnected 
  in 
  that 
  re*;ion 
  in 
  recent 
  years. 
  In 
  addition 
  to 
  

   the 
  distinctive 
  I)oroi<omn 
  fon'ithl 
  Hubbs 
  and 
  Miller 
  (19-H) 
  and 
  a 
  new 
  

   (riht 
  being 
  described 
  by 
  nie 
  in 
  Copeia, 
  a 
  new 
  species 
  of 
  hallbeak 
  of 
  tlie 
  

   ;zenus 
  IlyporhamphuJi 
  is 
  now 
  made 
  known. 
  

  

  About 
  GO 
  years 
  a^^o 
  Meek 
  and 
  Goss 
  (1885, 
  p. 
  221) 
  wrote 
  that 
  the 
  

   American 
  halfbt-aks 
  rcfeired 
  to 
  /// 
  mh-t/mp/n/s^ 
  were 
  "in 
  a 
  condition 
  

   of 
  gieat 
  confusion."' 
  Althoii^'h 
  a 
  niniibci- 
  of 
  papci's 
  dcalin<^ 
  with 
  tluf 
  

   New 
  World 
  .-pecics 
  have 
  appeared 
  since 
  liiat 
  time, 
  the 
  systemat 
  ic 
  status 
  

   and 
  particnlaily 
  the 
  distriitut 
  ion 
  of 
  the 
  American 
  forms 
  are 
  still 
  far 
  

   from 
  clear. 
  

  

  The 
  discovery 
  of 
  the 
  new 
  halfbeak, 
  described 
  below, 
  biin^^s 
  nj) 
  the* 
  

   (juesiiou 
  of 
  the 
  <reneric 
  validity 
  of 
  //i/por/ttt//i/>/i>/s 
  and 
  has 
  prompted 
  

   u 
  ciitical 
  study 
  of 
  hifisilirtis'/s 
  and 
  un'ifaxciaiiis, 
  the 
  ^feiiotypes, 
  I'espec- 
  

   tively, 
  of 
  //rri4iromp/iu.s 
  Cuvier 
  and 
  IIi/p(>rhain]>JiUi< 
  (lill. 
  This 
  study 
  

   has 
  j)roved 
  to 
  be 
  most 
  pr"odiict 
  ive. 
  for 
  a 
  number 
  of 
  t 
  rencliant 
  and 
  easily 
  

   observed 
  cliaraiters, 
  lieretofnrr 
  appaicntlv 
  o\erlooked, 
  weic 
  found. 
  

   The 
  presence 
  or 
  ab-ejice 
  of 
  scales 
  on 
  the 
  upjiei- 
  jaw 
  also 
  was 
  noted 
  by 
  

   Smith 
  ( 
  ll).'i:5, 
  p. 
  VM)). 
  In 
  |)reparin;j; 
  table 
  1, 
  in 
  which 
  the 
  «^enotype.s 
  

   of 
  IlrmiramphuH 
  and 
  Uyporhamplivx 
  are 
  compared, 
  I 
  examined 
  135 
  

   s|)ecimens 
  of 
  ^inifayciatns 
  and 
  05 
  specimens 
  of 
  lir<i-'<irnnxis 
  in 
  the 
  col- 
  

   lections 
  of 
  the 
  W 
  S. 
  Xational 
  .MuH-um. 
  These 
  specimens 
  represent 
  

  

  ' 
  SiK-Urd 
  llrmirhnmphun 
  liy 
  tlirni 
  niiil 
  liy 
  i\ 
  lioHt 
  of 
  otluT 
  nuttHirH. 
  Tlio 
  rtrlk'iniil 
  HpoMltifc 
  

   bjr 
  Cuvlor 
  (1817. 
  p. 
  \HC) 
  Ih 
  Himi 
  Unrnphun. 
  

  

  r.n.'ir.ao— 
  4.'» 
  

  

  IK.--, 
  

  

  