﻿K0.1131. 
  FISHES 
  FROM 
  COLORADO 
  BASIN— 
  GILBERT 
  AND 
  SCOFIELD. 
  499 
  

  

  being 
  contained 
  in 
  the 
  head 
  eight 
  times 
  (eleven 
  times 
  in 
  0. 
  mirabilis). 
  

   The 
  post 
  frontals 
  are 
  small 
  and 
  project 
  but 
  very 
  little, 
  diitering 
  from 
  

   (r. 
  mirabilis, 
  where 
  the 
  post 
  frontals 
  project 
  into 
  an 
  elevated 
  vring-like 
  

   process. 
  The 
  width 
  of 
  the 
  isthmns 
  is 
  contained 
  three 
  times 
  in 
  the 
  

   head; 
  length 
  of 
  maxillary 
  ]^ 
  times 
  in 
  head; 
  mandible 
  1§. 
  Least 
  depth 
  

   of 
  caudal 
  peduncle 
  2§ 
  in 
  head. 
  Distance 
  between 
  dorsals 
  half 
  length 
  

   of 
  base 
  of 
  first 
  dorsal; 
  base 
  of 
  first 
  dorsal 
  2^ 
  in 
  head; 
  second 
  dorsal 
  

   li; 
  anal 
  2 
  in 
  head; 
  length 
  of 
  longest 
  i)ectoral 
  ray 
  If 
  in 
  head. 
  Color 
  

   very 
  pale 
  olive, 
  some 
  of 
  the 
  sj)ecimeus 
  with 
  dark 
  x)nnctulations 
  about 
  

   the 
  head 
  and 
  fins. 
  The 
  ]>ale 
  coloration 
  is 
  probably 
  due 
  to 
  their 
  life 
  in 
  

   shallow 
  water 
  on 
  bottom 
  of 
  pale 
  sand. 
  

  

  Several 
  specimens, 
  the 
  longest 
  5 
  incljes 
  long, 
  were 
  taken 
  at 
  Horse- 
  

   shoe 
  Bend, 
  near 
  the 
  mouth 
  of 
  the 
  Colorado 
  Kiver, 
  in 
  Mexico, 
  where 
  

   they 
  are 
  quite 
  abundant. 
  The 
  species 
  inhabits 
  muddy 
  creeks 
  and 
  

   channels 
  communicating 
  with 
  the 
  river, 
  and 
  is 
  caught 
  and 
  eaten 
  by 
  the 
  

   Indians. 
  

  

  Type.—:So. 
  48127, 
  U.S.N.M. 
  

  

  Family 
  PLEURONECTID.E. 
  

  

  19. 
  PARALICHTHYS 
  ^STUARIUS 
  Gilbert 
  & 
  Scofield, 
  new 
  species. 
  

   (Plate 
  XXXIX.) 
  

  

  Head 
  3|; 
  depth 
  2^; 
  eye 
  oi; 
  interorbital 
  space 
  tlat, 
  12 
  in 
  head, 
  half 
  

   the 
  diameter 
  of 
  the 
  eye: 
  maxillary 
  2 
  in 
  head, 
  equal 
  to 
  the 
  pectoral 
  tin 
  ; 
  

   gill 
  rakers 
  0+20, 
  the 
  longest 
  two-thirds 
  length 
  of 
  eye; 
  dorsal 
  72 
  to 
  

   82; 
  anal 
  58 
  to 
  64. 
  (In 
  the 
  seven 
  specimens 
  the 
  rays 
  are: 
  Dorsal 
  72, 
  

   79,81,81,82,83,83; 
  anal 
  58, 
  GO, 
  GO, 
  02, 
  63. 
  03, 
  04.) 
  Vertebra 
  10+28; 
  

   scales 
  weakly 
  ciliated, 
  with 
  small 
  acces.sorj' 
  scales, 
  105 
  in 
  the 
  lateral 
  line. 
  

   Length 
  of 
  the 
  arch 
  contained 
  four 
  times 
  in 
  straight 
  part 
  of 
  lateral 
  line, 
  

   2 
  in 
  head; 
  height 
  of 
  arch 
  4i 
  in 
  head. 
  Four 
  of 
  the 
  seven 
  specimens 
  

   are 
  sinistral. 
  Color 
  pale 
  chocolate 
  brown. 
  Specimens 
  small, 
  to 
  

   9 
  inches 
  in 
  length. 
  Taken 
  at 
  Shoal 
  Point, 
  at 
  mouth 
  of 
  the 
  Colorado 
  

   Eiver, 
  Mexico, 
  by 
  the 
  United 
  States 
  Fish 
  Commission 
  steamer 
  Alba- 
  

   tross. 
  This 
  species 
  is 
  distinguished 
  from, 
  the 
  other 
  members 
  of 
  the 
  

   genus 
  by 
  its 
  numerous 
  fin 
  rays 
  and 
  its 
  many 
  gill 
  rakers. 
  It 
  is 
  nearest 
  

   related 
  to 
  ParaUchthys 
  californicKs, 
  which 
  is 
  abundant 
  along 
  the 
  entire 
  

   coast 
  of 
  California, 
  extending 
  as 
  far 
  south 
  as 
  Magdalena 
  Bay, 
  in 
  Lower 
  

   California. 
  Two 
  specimens 
  in 
  the 
  museum 
  of 
  Stanford 
  University 
  from 
  

   the 
  latter 
  locality 
  are 
  entirely 
  tyjiical 
  of 
  P. 
  calif 
  or 
  nicus. 
  

  

  Type.— 
  1^0. 
  48128, 
  U.S.KM. 
  

  

  