﻿294: 
  Mr. 
  C. 
  T. 
  Regan 
  on 
  the 
  Anatomy 
  and 
  

  

  irrorated 
  with 
  black 
  and 
  white 
  scales: 
  secondaries 
  similar 
  to 
  

   the 
  primaries, 
  with 
  a 
  large 
  brown 
  spot 
  at 
  the 
  anal 
  angle; 
  the 
  

   marginal 
  line 
  black 
  ; 
  the 
  fringe 
  white. 
  Underside 
  greenish 
  

   white 
  : 
  primaries 
  with 
  a 
  wide 
  submarginal 
  black 
  band 
  ex- 
  

   tending 
  from 
  near 
  the 
  apex 
  to 
  the 
  anal 
  angle 
  : 
  secondaries 
  

   with 
  a 
  large 
  black 
  spot 
  at 
  the 
  anal 
  angle. 
  

  

  Expanse 
  If 
  inch. 
  

  

  Ilab. 
  Peru, 
  La 
  Union, 
  Rio 
  Huacamaya, 
  Carabaya, 
  

   2000 
  feet 
  (Mas. 
  Bruce) 
  . 
  

  

  Allied 
  to 
  Racheospila 
  calliope, 
  Druce, 
  from 
  Mexico, 
  but 
  

   very 
  distinct. 
  

  

  XXXII. 
  — 
  The 
  Anatomy 
  and 
  Classification 
  of 
  the 
  Teleostean 
  

   Fishes 
  of 
  the 
  Order 
  Salmopercce. 
  By 
  0. 
  Tate 
  Regan, 
  M.A. 
  

  

  (Published 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum.) 
  

  

  The 
  order 
  Salmopercse 
  includes 
  only 
  three 
  genera 
  — 
  Percojms, 
  

   Columbia, 
  and 
  Aphredoderus 
  — 
  each 
  with 
  a 
  single 
  species, 
  

   little 
  fishes 
  of 
  the 
  fresh 
  waters 
  of 
  North 
  America. 
  It 
  is 
  an 
  

   isolated 
  group, 
  showing 
  resemblances 
  to 
  the 
  Iniomi, 
  Micro- 
  

   cyprini, 
  and 
  Berycomorphi, 
  but 
  quite 
  distinct 
  from 
  them 
  all. 
  

   The 
  following 
  description 
  is 
  based 
  on 
  examples 
  of 
  all 
  three 
  

   species 
  : 
  — 
  

  

  External 
  characters. 
  — 
  Body 
  moderately 
  elongate, 
  com- 
  

   pressed, 
  covered 
  with 
  adherent 
  ciliated 
  scales; 
  lateral 
  line 
  

   complete, 
  running 
  along 
  middle 
  of 
  side. 
  Mouth 
  rather 
  

   small, 
  terminal 
  or 
  subterminal, 
  not 
  or 
  scarcely 
  protractile, 
  

   bordered 
  above 
  mainly 
  by 
  the 
  prsemaxillaries 
  ; 
  maxillary 
  

   concealed 
  or 
  slightly 
  exposed 
  distally, 
  without 
  supramaxillary 
  ; 
  

   small 
  villiform 
  teeth 
  in 
  the 
  jaws. 
  Head 
  with 
  large 
  muciferous 
  

   cavities 
  ; 
  interorbital 
  region 
  flattish 
  ; 
  eyes 
  lateral 
  ; 
  two 
  

   nostrils 
  on 
  each 
  side. 
  Gill-membranes 
  attached 
  to 
  isthmus; 
  

   6 
  branchiostegals 
  ; 
  4 
  gills; 
  pseudobranchise. 
  Dorsal 
  fin 
  

   median, 
  of 
  2 
  to 
  4 
  spines 
  and 
  9 
  to 
  11 
  soft 
  rays 
  ; 
  anal 
  of 
  1 
  or 
  

   2 
  spines 
  and 
  6 
  or 
  7 
  soft 
  rays 
  ; 
  caudal 
  with 
  18 
  or 
  19 
  principal 
  

   rays, 
  16 
  or 
  17 
  branched 
  ; 
  pectorals 
  lateral 
  ; 
  pelvics 
  sub- 
  

   abdominal, 
  each 
  of 
  7 
  or 
  8 
  rays, 
  the 
  outermost 
  simple 
  and 
  with 
  

   a 
  rudimentary 
  spine 
  adnate 
  to 
  its 
  basal 
  part. 
  

  

  Air-bladder. 
  — 
  The 
  Salmopercae 
  are 
  phvsoclistic 
  ; 
  I 
  cannot 
  

   find 
  any 
  trace 
  of 
  a 
  pneumatic 
  duct. 
  In 
  this 
  I 
  am 
  confirmed 
  

   by 
  Dr. 
  W. 
  Gr. 
  Ridewood, 
  who 
  kindly 
  examined 
  an 
  example 
  

   of 
  Columbia 
  transmontana. 
  

  

  Head- 
  skeleton. 
  — 
  There 
  are 
  no 
  parietal 
  crests 
  and 
  the 
  

   occipital 
  crest 
  is 
  developed 
  only 
  on 
  the 
  posterior 
  face 
  of 
  the 
  

   skull; 
  the 
  posterior 
  temporal 
  fossse 
  are 
  open 
  above; 
  the 
  

  

  