﻿52 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  multifid 
  tips 
  arising 
  on 
  posterior 
  rim, 
  but 
  nostrils 
  not 
  fringed 
  witli 
  

   short 
  cirri. 
  

   12a. 
  Short 
  blunt 
  papillae 
  on 
  lips 
  and 
  around 
  mouth 
  generally, 
  these 
  in 
  

   form 
  of 
  short 
  barblets, 
  arrangement 
  as 
  follows 
  : 
  Median 
  part 
  of 
  chin 
  

   and 
  lower 
  jaw 
  with 
  2 
  or 
  3 
  rows 
  of 
  papillae, 
  or 
  chin 
  anteriorly 
  with 
  

   a 
  pair 
  of 
  low 
  lobes 
  in 
  form 
  of 
  reversed 
  parentheses 
  [ 
  ) 
  ( 
  ] 
  and 
  

   sometimes 
  at 
  their 
  inner 
  tips 
  a 
  pair 
  of 
  papillae 
  (more 
  or 
  less 
  fused 
  

   with 
  anterior 
  lobes 
  in 
  nigripinnis 
  and 
  in 
  pinniger) 
  ; 
  an 
  inner 
  row 
  

   of 
  barblets 
  lateral 
  to 
  median 
  lobes, 
  one 
  pair 
  on 
  each 
  side 
  ; 
  lower 
  lip 
  

   at 
  each 
  side 
  of 
  median 
  part 
  of 
  chin 
  lobelike, 
  sometimes 
  bearing 
  2 
  

   small 
  papillae 
  ; 
  along 
  inner 
  edge 
  of 
  groove 
  of 
  lower 
  jaw 
  are 
  2 
  or 
  3 
  

   large 
  papillae 
  or 
  knobs 
  on 
  each 
  side; 
  upper 
  lip 
  with 
  a 
  median 
  

   papilla 
  or 
  knob 
  and 
  5 
  more 
  on 
  each 
  side 
  ; 
  front 
  edge 
  of 
  snout 
  above 
  

   groove 
  without 
  papillae 
  but 
  laterally 
  3 
  to 
  5 
  knobs 
  or 
  papillae 
  

   present 
  or 
  absent; 
  sometimes 
  another 
  papilla 
  occurring 
  behind 
  

   rictus 
  and 
  still 
  another 
  below 
  rictus; 
  gill 
  membranes 
  joined 
  oppo- 
  

   site 
  fifth 
  to 
  seventh 
  upper 
  rays 
  of 
  pectoral 
  fin 
  ; 
  fleshy 
  pad 
  on 
  outer 
  

   base 
  of 
  pectoral 
  fin 
  with 
  a 
  free 
  posterior 
  membranous 
  margin 
  

   extending 
  dor.sally 
  to 
  opposite 
  attachment 
  of 
  gill 
  membranes 
  ; 
  dorsal 
  

   rays 
  10 
  to 
  19 
  ; 
  pectoral 
  fin 
  rays 
  21 
  to 
  27 
  ; 
  anus 
  closer 
  to 
  anal 
  origin 
  

   than 
  to 
  rear 
  margin 
  of 
  disk 
  {Cotylis 
  Miiller 
  and 
  Troschel). 
  

   13a. 
  Dorsal 
  rays 
  fewer 
  than 
  15, 
  counting 
  all 
  rudiments. 
  

   14a. 
  Dorsal 
  rays 
  13 
  or 
  14; 
  anal 
  10; 
  upper 
  lip 
  with 
  papillae. 
  

  

  15a. 
  Pectoral 
  fin 
  rays 
  22; 
  papillae 
  around 
  mouth 
  short 
  and 
  knob- 
  

   like 
  (Gulf 
  of 
  California) 
  Cotylis 
  papillifer 
  (Gilbert) 
  

  

  15&. 
  Pectoral 
  fin 
  rays 
  24 
  to 
  27; 
  papillae 
  around 
  moiith 
  more 
  numer- 
  

   ous, 
  better 
  developed, 
  barbellike; 
  lobe 
  of 
  lower 
  lip 
  next 
  to 
  

   middle 
  of 
  chin 
  with 
  two 
  barbels 
  (pi. 
  1, 
  A) 
  (Panama 
  Bay 
  to 
  

  

  Ecuador 
  and 
  northern 
  Peru) 
  Cotylis 
  microspilus 
  (Fowler) 
  

  

  14&. 
  Dorsal 
  rays 
  10 
  to 
  12 
  ; 
  anal 
  8 
  to 
  10 
  ; 
  papillae 
  on 
  upper 
  lip, 
  lobelike 
  ; 
  

   lobe 
  of 
  lower 
  lip 
  next 
  to 
  middle 
  of 
  chin 
  without 
  barbels 
  (pi. 
  1, 
  

   B) 
  ; 
  dorsal 
  origin 
  equidistant 
  between 
  midbase 
  of 
  caudal 
  fin 
  

   and 
  middle 
  of 
  postorbital 
  length 
  of 
  head 
  to 
  equidistant 
  be- 
  

   tween 
  midcaudal 
  base 
  and 
  upper 
  base 
  of 
  pectoral 
  fin 
  ; 
  color 
  

   pattern 
  variable 
  ; 
  median 
  fins 
  mottled, 
  barred, 
  or 
  blackish 
  with 
  

   tips 
  of 
  rays 
  white. 
  

   16a. 
  Depth 
  41/2 
  to 
  61/2 
  ; 
  eye 
  3.1 
  to 
  3.6 
  in 
  length 
  of 
  base 
  of 
  dorsal 
  fin 
  ; 
  

   dorsal 
  rays 
  usually 
  11, 
  anal 
  usually 
  9, 
  pectoral 
  22 
  to 
  26 
  

   (Maryland 
  to 
  West 
  Indies 
  to 
  Brazil). 
  

  

  Cotylis 
  nigripinnis 
  nigripinnis 
  Peters 
  

   166. 
  Depth 
  about 
  6% 
  or 
  7; 
  eye 
  2.8 
  in 
  length 
  of 
  dorsal 
  fin 
  base; 
  

   dorsal 
  rays 
  10, 
  anal 
  8, 
  pectoral 
  22 
  (Cocos 
  Island). 
  

  

  Cotylis 
  nigripinnis 
  woodsi, 
  new 
  subspecies 
  

  

  13&. 
  Dorsal 
  rays 
  17 
  to 
  19 
  (counting 
  all 
  rudiments) 
  ; 
  anal 
  10; 
  anal 
  

  

  origin 
  under 
  base 
  of 
  ninth 
  or 
  tenth 
  dorsal 
  fin 
  ray 
  or 
  under 
  middle 
  

  

  of 
  base 
  of 
  dorsal 
  fin 
  ; 
  origin 
  of 
  dorsal 
  fin 
  a 
  little 
  closer 
  to 
  tip 
  of 
  

  

  snout 
  than 
  midbase 
  of 
  caudal 
  fin 
  ; 
  papillae 
  on 
  upper 
  lip 
  knoblike 
  

  

  (Gulf 
  of 
  California) 
  Cotylis 
  pinniger 
  (Gilbert) 
  

  

  12&. 
  No 
  papilla 
  on 
  upper 
  lip, 
  lobelike 
  structures 
  occurring 
  around 
  lips 
  of 
  

   lower 
  jaw 
  when 
  best 
  developed 
  being 
  low 
  knobs 
  or 
  ridges, 
  chin 
  

   lacking 
  inner 
  series 
  of 
  papillae 
  as 
  described 
  for 
  Cotylis. 
  

   17a. 
  Gill 
  membranes 
  joined 
  at 
  upper 
  edge 
  of 
  pectoral 
  fin 
  base, 
  some- 
  

   times 
  a 
  little 
  anteriorly, 
  giving 
  appearance 
  of 
  being 
  opposite 
  

  

  