﻿A 
  .\K\V 
  HEMIRAMPHII) 
  Fli:H 
  — 
  MILLEK 
  191 
  

  

  pi<;iiii'iit<'il 
  with 
  black 
  cliroiiuitophorcs 
  ftulinj^ 
  po.steiiorly 
  bo 
  that 
  

   both 
  cliiii 
  and 
  tluuat 
  art" 
  hugely 
  coh>rlc>;s. 
  The 
  tips 
  of 
  tlie 
  caudal 
  rays 
  

   and 
  those 
  of 
  iho 
  Ioii«i:er 
  dorsal 
  rays 
  arc 
  marked 
  with 
  fine 
  black 
  jiunclu- 
  

   lations; 
  tiie 
  other 
  fins 
  are 
  mostly 
  pale. 
  Alon<i: 
  the 
  underside 
  of 
  tho 
  

   caudal 
  peduncle 
  are 
  three 
  rather 
  irregular 
  lontritudinal 
  rows 
  of 
  dark 
  

   l>iLrinent. 
  The 
  silvery 
  peritoneuni 
  is 
  ovei-lain 
  by 
  foppi'iy 
  Ijiowii 
  and 
  

   by 
  fine, 
  black 
  punctulations. 
  

  

  Habitat 
  and 
  associates. 
  — 
  Rfo 
  del 
  Fuerte, 
  near 
  El 
  Fuerte, 
  Sinaloa, 
  

   is 
  a 
  deep 
  river 
  with 
  sand 
  and 
  mud 
  bottom 
  and 
  abrupt 
  rocky 
  banks. 
  

   On 
  -May 
  4, 
  r.»42, 
  when 
  the 
  types 
  were 
  collected, 
  the 
  current 
  was 
  fairly 
  

   swift, 
  and 
  hauls 
  with 
  a 
  2o-foot 
  bag 
  seine 
  were 
  made 
  in 
  water 
  generally 
  

   1 
  to 
  .") 
  feet 
  deej) 
  but 
  more 
  than 
  G 
  feet 
  in 
  places. 
  At 
  noon 
  the 
  air 
  was 
  

   37*^ 
  C. 
  and 
  the 
  water 
  32 
  C 
  No 
  vegetation 
  was 
  seen, 
  and 
  the 
  shore 
  

   was 
  sandy, 
  with 
  trees 
  along 
  the 
  bank. 
  Collecting 
  was 
  confined 
  largely 
  

   to 
  the 
  backwaters. 
  The 
  point 
  wlierc 
  the 
  fish 
  were 
  secured 
  is 
  fully 
  

   KK) 
  miles 
  upstream 
  from 
  the 
  Pacific. 
  

  

  In 
  the 
  large 
  colle«'tion 
  made 
  here, 
  the 
  following 
  fishes, 
  tentatively 
  

   identified, 
  wer«' 
  also 
  seined: 
  A 
  species 
  of 
  cyprinid 
  fish 
  of 
  the 
  genus 
  

   Gila; 
  two 
  specimens 
  of 
  a 
  catfish 
  of 
  the 
  gemis 
  Ictaluius; 
  cyprinodont 
  

   fi.shes 
  of 
  several 
  genera 
  including 
  MoUienisia 
  sphenops; 
  six 
  mullets, 
  

   Af/onostonuis 
  montieola: 
  a 
  large 
  niunber 
  of 
  the 
  fresh-water 
  atherine 
  

   Mclaniris 
  cryataUinus 
  ; 
  and 
  two 
  gobies. 
  Ait'aou,s 
  (or 
  Clumopkonis) 
  

   transandeanus 
  and 
  Gohiomonis 
  7>wntlatv-s\ 
  Most 
  of 
  these 
  species 
  are 
  

   confined 
  to 
  fresh 
  water. 
  

  

  Ranfi< 
  . 
  — 
  The 
  new 
  s[)ecies 
  was 
  collected 
  only 
  in 
  the 
  Kio 
  del 
  Fuerte. 
  

   Ralph 
  G. 
  Miller 
  -aw 
  halfbeaks 
  in 
  the 
  Rfo 
  Culiacan 
  at 
  Culiacan, 
  Sina- 
  

   loa. 
  Mexico, 
  alxiiit 
  l.">0 
  miles 
  south 
  of 
  El 
  Fuerte 
  and 
  about 
  40 
  miles 
  

   ui)Stream 
  fr(»m 
  tin* 
  Pacific, 
  but 
  the 
  identity 
  of 
  this 
  species 
  is 
  unknown. 
  

  

  Relationships. 
  — 
  Tlyporhamphus 
  patris 
  appears 
  to 
  be 
  the 
  southern 
  

   repi-esentative 
  of 
  //. 
  ros,ic 
  (.Jordan 
  and 
  Gilbert) 
  (1880). 
  which 
  is 
  

   known 
  frojii 
  San 
  Pedro, 
  Calif., 
  south 
  to 
  the 
  tip 
  of 
  Paja 
  California, 
  

   then 
  up 
  the 
  west 
  side 
  of 
  the 
  Gulf 
  of 
  California 
  and 
  southward 
  along 
  

   (lie 
  maiidand 
  of 
  Mexico 
  to 
  Guaymas. 
  Sonora 
  (Evermann 
  and 
  Jenkins, 
  

   1801, 
  p. 
  13.'); 
  record 
  confirmed 
  by 
  examination 
  of 
  the 
  five 
  specimens 
  

   from 
  (iuaymas 
  in 
  the 
  Stanford 
  Natural 
  History 
  M\iseum, 
  No. 
  437). 
  

   Ki'f) 
  del 
  Fiier-te, 
  tlie 
  liabital 
  of 
  jxitris, 
  is 
  about 
  170 
  miles 
  soiilli 
  of 
  

   tiuaynias. 
  

  

  'ilie 
  two 
  s|tecie^ 
  agree 
  in 
  most 
  measuremenl> 
  and 
  coimts 
  and 
  in 
  the 
  

   following 
  important 
  charact<'rs: 
  (1) 
  P(»st«'rior 
  position 
  of 
  the 
  pelvic 
  

   fins; 
  {'!) 
  gill 
  rakers: 
  21 
  to 
  2;') 
  on 
  the 
  lower 
  limb 
  of 
  the 
  first 
  gill 
  arch 
  

   in 
  my 
  counts 
  for 
  rosne^ 
  21 
  to 
  21 
  for 
  patris; 
  {W) 
  long 
  mandible, 
  which 
  

   api)ears 
  to 
  Ix' 
  slightly 
  longer 
  in 
  roKar^ 
  but 
  a 
  series 
  of 
  comparable 
  sizes 
  

   would 
  probably 
  eliminate 
  this 
  difference; 
  (4) 
  no 
  scales 
  on 
  i\\*.' 
  dorsal 
  

   or 
  anal 
  fins; 
  (.'>) 
  dentition. 
  The 
  tw(> 
  species 
  differ 
  as 
  slutwn 
  in 
  the 
  

   (oiiiparison 
  presente<j 
  in 
  table 
  2. 
  Soine 
  oi- 
  all 
  of 
  these 
  difrerenc<»s 
  

  

  