﻿64 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  COTYLIS 
  MICROSPILUS 
  (Fowler) 
  

  

  Plate 
  1, 
  A 
  

  

  CauUstiiis 
  microspilvs 
  Fowlee, 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  1916, 
  p. 
  412, 
  

   fig. 
  4 
  (Panama 
  Bay). 
  

  

  Description. 
  — 
  Head 
  contained 
  about 
  2%, 
  disk 
  2.9 
  or 
  3, 
  greatest 
  

   depth 
  of 
  body 
  5 
  to 
  6, 
  in 
  standard 
  length; 
  eye 
  21/2 
  in 
  interorbital 
  

   space 
  ; 
  disk 
  a 
  little 
  shorter 
  than 
  length 
  of 
  head 
  ; 
  tip 
  of 
  chin 
  to 
  front 
  

   of 
  disk 
  about 
  % 
  to 
  % 
  length 
  of 
  disk 
  ; 
  distance 
  from 
  base 
  of 
  last 
  dorsal 
  

   fin 
  ray 
  to 
  midbase 
  of 
  caudal 
  fin 
  contained 
  nearly 
  three 
  times 
  in 
  base 
  

   of 
  dorsal 
  fin; 
  dorsal 
  origin 
  nearly 
  an 
  eye 
  diameter 
  closer 
  to 
  mid- 
  

   base 
  of 
  caudal 
  fin 
  than 
  to 
  rear 
  of 
  orbit; 
  depressed 
  anal 
  fin 
  reaching 
  

   a 
  trifle 
  past 
  a 
  line 
  through 
  caudal 
  fin 
  base, 
  and 
  depressed 
  dorsal 
  fin 
  

   reaching 
  to 
  opposite 
  caudal 
  fin 
  base; 
  upper 
  lip 
  on 
  premaxillary 
  with 
  

   a 
  median 
  papilla 
  and 
  five 
  more 
  on 
  each 
  side, 
  but 
  none 
  posteriorly 
  on 
  

   upper 
  lip; 
  middle 
  of 
  snout 
  with 
  three 
  short 
  papillae 
  or 
  knobs, 
  but 
  

   edge 
  of 
  snout 
  above 
  groove 
  without 
  papillae 
  anteriorly 
  but 
  about 
  five 
  

   well-developed 
  ones 
  laterally 
  ; 
  another 
  papilla 
  behind 
  rictus 
  and 
  one 
  

   on 
  lower 
  lip 
  below 
  rictus; 
  median 
  part 
  of 
  chin 
  and 
  lower 
  jaw 
  with 
  

   three 
  rows 
  of 
  papillae, 
  the 
  most 
  anterior 
  being 
  a 
  pair 
  of 
  low 
  lobes, 
  

   next 
  a 
  pair 
  of 
  papillae, 
  and 
  the 
  inner 
  row 
  consisting 
  of 
  two 
  pairs 
  

   of 
  papillae, 
  with 
  the 
  outer 
  pair 
  posterior 
  to 
  the 
  anterior 
  pair 
  ; 
  lower 
  

   lip 
  at 
  each 
  side 
  of 
  median 
  part 
  of 
  chin 
  forming 
  a 
  small 
  lobe 
  bearing 
  

   two 
  small 
  papillae 
  ; 
  three 
  large 
  papillae 
  along 
  the 
  inner 
  edge 
  of 
  the 
  

   groove 
  along 
  edge 
  of 
  lower 
  lip 
  on 
  each 
  side 
  ; 
  preopercular 
  spine 
  well 
  

   developed; 
  three 
  or 
  four 
  pairs 
  of 
  small 
  incisorlike 
  teeth 
  at 
  front 
  of 
  

   lower 
  jaw 
  in 
  outer 
  row; 
  teeth 
  at 
  front 
  of 
  upper 
  jaw 
  nearly 
  conical; 
  

   lateral 
  teeth 
  of 
  both 
  jaws 
  conical; 
  a 
  small 
  patch 
  of 
  teeth 
  behind 
  outer 
  

   teeth 
  at 
  front 
  of 
  both 
  jaws; 
  interorbital 
  space 
  flat; 
  anterior 
  nostril 
  

   tubular 
  with 
  a 
  short 
  dermal 
  flap, 
  sometimes 
  branched, 
  arising 
  at 
  the 
  

   posterior 
  rim 
  of 
  this 
  nostril; 
  shoulder 
  girdle 
  with 
  a 
  fleshy 
  lobe 
  and 
  

   a 
  shallow 
  groove 
  along 
  its 
  lower 
  edge 
  separating 
  it 
  from 
  the 
  lower 
  

   less 
  fleshy 
  lobe; 
  base 
  of 
  pectoral 
  fin 
  with 
  a 
  fleshy 
  lobe, 
  the 
  posterior 
  

   and 
  ventral 
  margins 
  free, 
  this 
  free 
  margin 
  beginning 
  at 
  point 
  where 
  

   gill 
  membrane 
  is 
  fused 
  opposite 
  base 
  of 
  sixth 
  or 
  seventh 
  pectoral 
  

   ray 
  from 
  dorsal 
  edge 
  of 
  that 
  fin; 
  upper 
  edge 
  of 
  axial 
  dermal 
  flap 
  

   behind 
  pectoral 
  fin 
  is 
  fused 
  to 
  base 
  of 
  fin 
  opposite 
  ninth 
  or 
  tenth 
  ray 
  

   from 
  dorsal 
  edge 
  of 
  pectoral 
  fin 
  ; 
  pelvic 
  fin 
  attached 
  to 
  near 
  base 
  of 
  

   pectoral 
  fin 
  rays 
  ; 
  lower 
  rays 
  of 
  pectoral 
  fin 
  nearly 
  as 
  long 
  as 
  middle 
  

   pectoral 
  fin 
  rays 
  ; 
  margins 
  of 
  disk 
  and 
  pelvic 
  pads 
  of 
  disk 
  all 
  covered 
  

   with 
  low 
  flattened 
  papillae; 
  anus 
  much 
  closer 
  to 
  anal 
  origin 
  than 
  

   to 
  rear 
  margin 
  of 
  disk. 
  

  

  Coloration. 
  — 
  In 
  alcohol, 
  pale 
  brownish 
  everywhere 
  on 
  dorsal 
  sur- 
  

   faces 
  of 
  head 
  and 
  anterior 
  parts 
  of 
  body 
  profusely 
  brown-spotted, 
  

   these 
  spots 
  small 
  and 
  rather 
  close 
  together 
  ; 
  tips 
  of 
  all 
  rays 
  of 
  median 
  

  

  