﻿4 
  DC 
  

  

  rnoLEEDixas 
  of 
  the 
  national 
  mcseim. 
  

  

  AGOSIA 
  COUESII 
  Yarrow. 
  

  

  ^Niiie 
  specnueiis 
  were 
  taken 
  at 
  Tempe, 
  and 
  do 
  not 
  agree 
  perfectly 
  

   with 
  current 
  descriptions. 
  The 
  tbllowing 
  description 
  is 
  based 
  on 
  our 
  

   siDecimens: 
  Head 
  3| 
  to 
  4; 
  depth 
  4 
  to 
  o; 
  eye 
  4 
  to 
  4.^ 
  in 
  head, 
  3 
  in 
  

   snout; 
  J). 
  8; 
  A. 
  7; 
  scales 
  14 
  to 
  17-70 
  to 
  77-10 
  or 
  11; 
  teeth 
  1 
  or 
  2, 
  

   4-4, 
  2 
  or 
  ]. 
  r>ody 
  stout, 
  the 
  head 
  long 
  and 
  conical, 
  the 
  snout 
  pointed. 
  

   Mouth 
  broad, 
  interior, 
  horizontal, 
  the 
  lii)s 
  Heshy. 
  Width 
  of 
  istlinuis 
  

   10 
  to 
  V.) 
  times 
  in 
  length 
  of 
  tish. 
  loye 
  small 
  ami 
  high 
  up. 
  Candal 
  

   peduncle 
  deep 
  and 
  compressed, 
  its 
  least 
  depth 
  contained 
  2^ 
  m 
  the 
  head. 
  

   Fins 
  all 
  large; 
  the 
  pectorals 
  reaching 
  front 
  origin 
  of 
  ventrals; 
  tlie 
  ven- 
  

   trals 
  reaching 
  past 
  front 
  of 
  anal; 
  free 
  edge 
  of 
  dorsal 
  and 
  anal 
  slightly 
  

   concave; 
  front 
  of 
  the 
  dorsal 
  in 
  advance 
  of 
  origin 
  of 
  ventrals 
  and 
  

   half 
  way 
  between 
  base 
  of 
  middle 
  caudal 
  rays 
  and 
  nostril. 
  The 
  length 
  

   of 
  the 
  dorsal 
  is 
  contained 
  1 
  /^o 
  in 
  head 
  ; 
  its 
  longest 
  ray 
  1 
  ^ 
  i" 
  head. 
  

   The 
  longest 
  ray 
  of 
  the 
  anal 
  is 
  contained 
  li 
  in 
  the 
  head. 
  Color 
  dark 
  

   above 
  and 
  on 
  sides, 
  mottled 
  slightly 
  with 
  black; 
  pale 
  below; 
  tins 
  all 
  

   plain; 
  no 
  lateral 
  band 
  or 
  caudal 
  spot. 
  Our 
  largest 
  specimen, 
  2^ 
  inches 
  

   long. 
  

  

  Measurements 
  of 
  Ayosia 
  coiiesii. 
  

  

  13. 
  AGOSIA 
  CHRYSOGASTER 
  Girard. 
  

  

  Only 
  one 
  specimen 
  was 
  obtained 
  at 
  Chino. 
  

  

  Head 
  4 
  in 
  length; 
  depth 
  4A; 
  eye 
  3A; 
  snout 
  3A; 
  interorbital 
  4; 
  D. 
  8: 
  

   A. 
  7; 
  scales 
  10-80-14; 
  teeth 
  4-4, 
  without 
  grinding 
  surface. 
  

  

  11. 
  PLAGOPTERUS 
  ARGENTISSIMUS 
  Cope. 
  

  

  A 
  few 
  specimens 
  were 
  procured 
  in 
  the 
  mouth 
  of 
  the 
  Ilio 
  Gila 
  at 
  

   Yuma, 
  and 
  others 
  in 
  the 
  Salt 
  Eiver 
  at 
  Tempe. 
  The 
  species 
  had 
  been 
  

   reported 
  hitherto 
  only 
  from 
  the 
  San 
  Luis 
  Valley 
  in 
  western 
  Colorado. 
  

   Our 
  specimens 
  do 
  not 
  differ 
  from 
  the 
  types, 
  with 
  one 
  of 
  which 
  they 
  

   have 
  been 
  compared. 
  

  

  Head 
  4 
  in 
  length; 
  depth 
  5; 
  eye 
  4 
  in 
  head, 
  1^ 
  in 
  snout, 
  H 
  in 
  interor- 
  

   bital 
  space; 
  D. 
  II, 
  7; 
  anal 
  10; 
  teeth 
  2, 
  5-4, 
  2, 
  without 
  grinding 
  surface. 
  

   Length 
  2^ 
  inches. 
  Least 
  depth 
  of 
  caudal 
  peduncle 
  2i 
  in 
  head, 
  its 
  

   length 
  1^ 
  in 
  head. 
  Preorbital 
  not 
  quite 
  as 
  long 
  as 
  eye. 
  

  

  Front 
  of 
  dorsal 
  behind 
  origin 
  of 
  ventrals, 
  and 
  very 
  slightly 
  nearer 
  

   base 
  of 
  caudal 
  than 
  tip 
  of 
  snout; 
  tirst 
  dorsal 
  spine 
  not 
  quite 
  as 
  long 
  

  

  