﻿490 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  of 
  the 
  first 
  ray; 
  first 
  dorsal 
  nearer 
  tip 
  of 
  snout 
  than 
  base 
  of 
  caudal; 
  

   ventrals 
  not 
  reacliing- 
  quite 
  to 
  vent, 
  If 
  in 
  head. 
  Muzzle 
  not 
  ijroject- 
  

   ing; 
  about 
  six 
  rows 
  of 
  short 
  tliick 
  papilla' 
  on 
  upper 
  lip. 
  the 
  smallest 
  

   above; 
  lower 
  lip 
  large, 
  incised 
  to 
  its 
  base, 
  with 
  about 
  twelve 
  rows 
  of 
  

   short 
  thick 
  papilhe, 
  which 
  are 
  quite 
  small 
  posteriorly; 
  distance 
  from 
  

   front 
  of 
  upper 
  lip 
  to 
  back 
  of 
  lower 
  li 
  in 
  snout; 
  jaws 
  with 
  a 
  slight 
  car- 
  

   tilaginous 
  sheath. 
  Width 
  of 
  preorbital 
  a 
  little 
  less 
  than 
  half 
  its 
  length. 
  

   Beaching 
  a 
  length 
  of 
  2 
  feet. 
  Gila 
  Basin. 
  

  

  This 
  species 
  has 
  been 
  recorded 
  from 
  the 
  following 
  places: 
  Kio 
  Sau 
  

   Pedro, 
  Gila 
  Basin 
  (type 
  locality), 
  by 
  Baird 
  & 
  Girard 
  ; 
  Fort 
  Thomas, 
  Gila 
  

   Eiver, 
  b}^ 
  Kirsch. 
  

  

  Table 
  of 
  measurements. 
  

  

  3. 
  CATOSTOMUS 
  DISCOBOLUS 
  Cope. 
  

   CalostoniKS 
  discpholKS 
  Cope, 
  Hayden's 
  Geol. 
  Surv. 
  Wyom., 
  ]). 
  435, 
  1870. 
  

  

  The 
  following 
  description 
  is 
  based 
  on 
  specimens 
  taken 
  at 
  Green 
  

   liiver, 
  Wyoming, 
  by 
  Doctor 
  B. 
  W, 
  Evermann, 
  of 
  the 
  United 
  States 
  

   Fish 
  Commission. 
  The 
  species 
  was 
  not 
  found 
  by 
  Doctor 
  Gilbert 
  in 
  the 
  

   Lower 
  Colorado, 
  where 
  it 
  is 
  i)robably 
  replaced 
  by 
  C. 
  latipinnis. 
  The 
  

   description 
  is 
  included 
  here 
  in 
  an 
  attempt 
  to 
  clear 
  up 
  the 
  confusion 
  

   existing 
  between 
  the 
  two 
  species. 
  Our 
  specimens, 
  although 
  from 
  the 
  

   type 
  locality, 
  do 
  not 
  agree 
  exactly 
  with 
  the 
  original 
  description, 
  the 
  

   diflerences 
  being 
  probably 
  due 
  to 
  the 
  very 
  small 
  size 
  of 
  the 
  type. 
  

  

  Head 
  3i 
  to 
  4i. 
  Depth 
  about 
  o|. 
  Eye 
  small, 
  high 
  up, 
  5.^ 
  to 
  (i 
  in 
  

   head, 
  2f 
  in 
  snout, 
  2f 
  in 
  interorbital 
  space. 
  Interorbital 
  space 
  8.^ 
  

   in 
  head. 
  Width 
  of 
  preorbital 
  less 
  than 
  half 
  its 
  length. 
  Least 
  depth 
  

   of 
  caudal 
  peduncle 
  2i 
  in 
  its 
  length, 
  2 
  in 
  length 
  of 
  head; 
  greatest 
  depth 
  

   of 
  head 
  If 
  in 
  its 
  length, 
  depth 
  from 
  lower 
  edge 
  of 
  orbit 
  3^ 
  in 
  head. 
  

   Muzzle 
  projecting 
  slightly 
  beyond 
  upper 
  lip. 
  Upper 
  margin 
  of 
  dorsal 
  

   very 
  slightly 
  concave, 
  the 
  length 
  of 
  its 
  base 
  1| 
  in 
  the 
  longest 
  ray, 
  l.h 
  in 
  

   length 
  of 
  head; 
  last 
  ray 
  half 
  length 
  of 
  first; 
  front 
  of 
  dorsal 
  midway 
  

   between 
  tip 
  of 
  snout 
  and 
  base 
  of 
  caudal 
  ; 
  ventral 
  1 
  /o 
  in 
  head, 
  rounded, 
  

   not 
  reaching 
  quite 
  to 
  vent. 
  Mouth 
  as 
  in 
  C. 
  latipiniiis, 
  except 
  tliat 
  

   the 
  posterior 
  tubercles 
  on 
  lower 
  lip 
  are 
  long 
  and 
  not 
  nearly 
  so 
  closely 
  

   set, 
  there 
  being 
  nine 
  or 
  ten 
  rows; 
  jaws 
  with 
  a 
  slight 
  cartilaginous 
  

   pellicle. 
  

  

  