﻿492 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  ments 
  and 
  other 
  data 
  is 
  given 
  below. 
  The 
  scales 
  average 
  smaller 
  than 
  

   those 
  in 
  the 
  type 
  specimen, 
  and 
  the 
  majjority 
  have 
  one 
  more 
  dorsal 
  

   ray. 
  The 
  anal 
  tin 
  is 
  not 
  so 
  deej). 
  In 
  the 
  small 
  specimens 
  \\\e, 
  nuchal 
  

   hump 
  forms 
  a 
  sharj) 
  keel 
  from 
  dorsal 
  to 
  nape, 
  the 
  keel 
  being 
  but 
  little 
  

   elevated. 
  Xiiruvchen 
  itiiconip((}i(jre, 
  described 
  by 
  Jordan 
  & 
  Evermann 
  

   from 
  a 
  single 
  small 
  specimen, 
  agrees 
  with 
  the 
  young 
  of 
  A', 
  cypho 
  except 
  

   in 
  the 
  number 
  of 
  dorsal 
  rays, 
  there 
  being 
  but 
  twelve 
  rays 
  in 
  the 
  dorsal 
  

   of 
  X. 
  uneompalujre. 
  These 
  two 
  will 
  i)robiibly 
  be 
  found 
  to 
  be 
  the 
  same 
  

   species. 
  

  

  MeannyemnitH 
  of 
  Xiirauchcn 
  cjiplio. 
  

  

  Family 
  CYPEINID.E. 
  

  

  fi. 
  PTYCHOCHEILUS 
  LUCIUS 
  Girard, 
  

  

  Several 
  small 
  specimens 
  from 
  the 
  Colorado 
  Kiver 
  at 
  Yuina, 
  and 
  at 
  the 
  

   Horseshoe 
  Bend 
  near 
  its 
  mouth. 
  They 
  do 
  not 
  differ 
  from 
  the 
  original 
  

   description. 
  The 
  s])ecies 
  i.s 
  abundant 
  in 
  the 
  Gila 
  and 
  Lower 
  Colorado, 
  

   and 
  is 
  the 
  most 
  highly 
  prized 
  of 
  all 
  the 
  native 
  fishes. 
  It 
  is 
  frequently 
  

   taken 
  reaching 
  a 
  length 
  of 
  from 
  4 
  to 
  5 
  feet, 
  and 
  is 
  universally 
  known 
  

   as 
  the 
  "Colorado 
  Salmon." 
  It 
  is 
  reported 
  as 
  abundant 
  also 
  in 
  the 
  

   headwaters 
  of 
  the 
  Colorado 
  in 
  Utah, 
  Colorado, 
  and 
  Wyoming-. 
  

  

  7. 
  GILA 
  ELEGANS 
  Baird 
  & 
  Girard. 
  

  

  Specimens 
  of 
  this 
  species 
  were 
  taken 
  in 
  the 
  Colorado 
  and 
  (Jila 
  rivers 
  

   at 
  Yuma, 
  in 
  Salt 
  Kiver 
  at 
  Tempe, 
  and 
  in 
  the 
  Lower 
  Colorado 
  at 
  the 
  

   Horseshoe 
  Bend. 
  It 
  is 
  most 
  abundant 
  in 
  the 
  larger 
  river 
  channels. 
  

   Our 
  specimens 
  are 
  from 
  4 
  to 
  15 
  inches 
  long. 
  The 
  head 
  is 
  4^ 
  in 
  the 
  

   length, 
  the 
  depth 
  4.J 
  to 
  5i. 
  Diameter 
  of 
  eye 
  4 
  to 
  7i 
  in 
  head. 
  Scales 
  

   21 
  to 
  24—77 
  to 
  88—10 
  to 
  12. 
  Dorsal 
  10 
  (9 
  to 
  11); 
  anal 
  10 
  (9 
  to 
  11). 
  

   Teeth 
  2-5-4-2. 
  

  

  In 
  the 
  larger 
  specimens 
  the 
  pectorals 
  reach 
  a 
  little 
  past 
  origin 
  of 
  

   ventrals, 
  while 
  in 
  the 
  smaller 
  ones 
  the 
  ventrals 
  are 
  not 
  reached 
  by 
  the 
  

   pectorals. 
  The 
  caudal 
  peduncle 
  is 
  longer 
  in 
  the 
  adults 
  and 
  the 
  upper 
  

   profile 
  of 
  the 
  head 
  is 
  very 
  concave, 
  while 
  in 
  the 
  young 
  it 
  is 
  nearlj' 
  

   straight. 
  

  

  