﻿NO. 
  1131. 
  FISHES 
  FROM 
  COLORADO 
  BASIN— 
  GILBERT 
  AND 
  SCOFIELI). 
  493 
  

  

  8. 
  GILA 
  ROBUSTA 
  Baird 
  & 
  Girard. 
  

  

  Gila 
  rohusia 
  iJAiiiD 
  & 
  Girard, 
  Proc. 
  Ac. 
  Xsit. 
  Sci. 
  Pbila., 
  1853, 
  i>. 
  368. 
  — 
  Girard, 
  

   Pac. 
  K. 
  R. 
  Snrv., 
  1858, 
  X, 
  p. 
  285.— 
  .Jordan 
  & 
  Gilbert, 
  Syuopsis, 
  1883, 
  p, 
  

   228.— 
  Jordan, 
  Bull. 
  U. 
  S. 
  Fish 
  Couuinssiou, 
  IX, 
  1889, 
  ]>. 
  27.— 
  Jordan 
  & 
  

   E\ERMANN, 
  Fishes 
  of 
  N. 
  and 
  ]\1. 
  A., 
  1896, 
  p. 
  227. 
  

  

  LeuciscHs 
  rohiistiis 
  Gintiier, 
  Cat., 
  1868, 
  VII, 
  p. 
  241. 
  

  

  Gila 
  puUhella 
  Baird 
  A- 
  Girard, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Phila., 
  18.54, 
  p. 
  29. 
  

  

  Gila 
  (jrahami 
  Baird 
  tV 
  Girard, 
  Proc. 
  Ac. 
  Nat. 
  Sci, 
  Pbila., 
  1833, 
  j). 
  389. 
  — 
  Girard, 
  

   U. 
  S. 
  aud 
  Mex. 
  Bound. 
  Surv., 
  Zool., 
  1859, 
  p. 
  61. 
  — 
  Jordan 
  »fc 
  Gilrert, 
  Syn- 
  

   o])sis, 
  1883, 
  p. 
  228. 
  

  

  Li'iicisciis 
  (/rahami 
  GC'NTHER, 
  Cat., 
  1868, 
  VII, 
  p. 
  242. 
  

  

  Gila 
  (jriicilis 
  Jordan 
  & 
  Gilbert, 
  Synopsis, 
  1883, 
  p. 
  229. 
  

  

  Very 
  abundant 
  in 
  Salt 
  Eiver 
  at 
  Tempt^', 
  where 
  it 
  exceeds 
  in 
  iiinnbers 
  

   all 
  other 
  species. 
  It 
  was 
  not 
  taken 
  in 
  the 
  Colorado, 
  and 
  is 
  probably 
  

   more 
  abundant 
  iu 
  smaller 
  streams 
  thaii 
  in 
  the 
  main 
  river 
  channels. 
  

   Our 
  specimens 
  show 
  a 
  great 
  range 
  of 
  variation 
  in 
  the 
  size 
  of 
  the 
  

   scales, 
  as 
  can 
  be 
  seen 
  from 
  tlie 
  following 
  table. 
  The 
  two 
  specimens 
  

   having 
  eighty-three 
  and 
  one 
  hundred 
  and 
  ten 
  scales 
  in 
  the 
  lateral 
  line 
  

   are 
  probably 
  abnoruml. 
  The 
  larger 
  specimens 
  bear 
  a 
  striking 
  resem- 
  

   blance 
  to 
  Gila 
  eJegans^ 
  and 
  the 
  younger 
  ones 
  are 
  difficult 
  to 
  distinguish 
  

   from 
  LenciscHS 
  intermedins. 
  Compared 
  with 
  the 
  latter, 
  Gila 
  robustahiis 
  

   slightly 
  smaller 
  scales 
  and 
  a 
  slenderer 
  caudal 
  peduncle. 
  The 
  body 
  is 
  

   not 
  so 
  deep 
  and 
  its 
  head 
  is 
  more 
  slender. 
  The 
  scales 
  below 
  the 
  lateral 
  

   line 
  are 
  not 
  specked 
  with 
  black. 
  

  

  This 
  species 
  is 
  abundant 
  throughout 
  the 
  entire 
  Colorado 
  River 
  Basin. 
  

   Owing 
  to 
  the 
  close 
  resemblance 
  which 
  this 
  species 
  bears 
  to 
  Leuciscus 
  

   ititermedius, 
  the 
  synonymy 
  of 
  the 
  two 
  has 
  been 
  greatly 
  confused. 
  

  

  Measurements 
  of 
  Gila 
  rolmsta, 
  Tempe, 
  Arizona. 
  

  

  9. 
  LEUCISCUS 
  INTERMEDIUS 
  Girard. 
  

  

  Gila 
  graeilifi 
  Baird 
  & 
  Girard, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Phila., 
  1853, 
  p. 
  369 
  (preoccu- 
  

   pied 
  in 
  Leuciscus). 
  — 
  Girard, 
  Pac. 
  R. 
  K. 
  Surv., 
  X, 
  1858, 
  p. 
  287. 
  — 
  Jordan 
  «&. 
  

   Gilbert, 
  Synopsis, 
  1883, 
  p. 
  229. 
  

  

  Gila 
  (jihbosa 
  Baird 
  & 
  Girard, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Phila., 
  1854, 
  p. 
  28, 
  Rio 
  

   Santa 
  Cruz 
  (jjreoccupied 
  in 
  Leuciscus). 
  

  

  