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  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  los 
  

  

  Genus 
  Wetmorella 
  Fowler 
  and 
  Bean 
  

  

  Wetmorella 
  Fowler 
  and 
  Bean, 
  U. 
  S. 
  Nat. 
  Mus. 
  Bull. 
  100, 
  vol. 
  7, 
  p. 
  211, 
  1928. 
  

   (Genotype, 
  Wetmorella 
  philippina 
  Fowler 
  and 
  Bean.) 
  

  

  The 
  genus 
  Wetmorella 
  is 
  characterized 
  by 
  dorsal 
  rays 
  IX 
  or 
  X, 
  

   9 
  or 
  10; 
  anal 
  111,8; 
  pectoral 
  ii,9 
  or 
  10; 
  branched 
  caudal 
  rays 
  6+5; 
  

   lateral 
  line 
  interrupted 
  with 
  13 
  to 
  15+6 
  or 
  7 
  pores 
  to 
  base 
  of 
  caudal 
  

   fin. 
  Jaws 
  equal 
  or 
  nearly 
  so; 
  premaxUlary 
  protractile; 
  teeth 
  short, 
  

   conical, 
  in 
  a 
  single 
  row 
  in 
  both 
  jaws, 
  those 
  near 
  front 
  of 
  both 
  jaws 
  

   becoming 
  gradually 
  enlarged, 
  the 
  two 
  pairs 
  nearest 
  tip 
  of 
  jaws 
  largest; 
  

   gUl 
  membranes 
  broadly 
  joined 
  across 
  isthmus, 
  forming 
  a 
  free 
  fold; 
  

   head 
  with 
  a 
  distinctive 
  scale 
  pattern 
  composed 
  of 
  large, 
  characteristi- 
  

   cally 
  shaped 
  scales, 
  arranged 
  in 
  a 
  pattern 
  similar 
  to 
  that 
  shown 
  in 
  

   figure 
  53. 
  The 
  chief 
  variation 
  in 
  scales 
  on 
  the 
  head 
  is 
  that 
  there 
  may 
  

   be 
  2 
  median 
  scales 
  on 
  the 
  snout 
  instead 
  of 
  1 
  ; 
  cheek 
  with 
  1 
  or 
  2 
  rows 
  

   below 
  which 
  on 
  subopercle 
  may 
  occur 
  another 
  row 
  and 
  a 
  single 
  scale 
  

   below 
  the 
  latter; 
  2 
  or 
  3 
  rows 
  of 
  scales 
  behind 
  eye, 
  including 
  the 
  gill 
  

   cover; 
  a 
  row 
  of 
  large 
  scales 
  occurs 
  above 
  dorsal 
  lateral 
  line, 
  then 
  a 
  

   second 
  row 
  along 
  spiny 
  dorsal 
  fin, 
  mostly 
  covering 
  the 
  spines 
  except 
  

   tips, 
  becoming 
  much 
  smaller 
  along 
  soft 
  dorsal 
  rays, 
  almost 
  disappear- 
  

   ing 
  on 
  base 
  of 
  last 
  ray; 
  anal 
  fin 
  with 
  a 
  similar 
  sheath 
  of 
  scales; 
  basal 
  

   half 
  of 
  caudal 
  fin 
  enclosed 
  in 
  large 
  scales; 
  axillary 
  pelvic 
  scale 
  present, 
  

   short; 
  interorbital 
  space 
  flattish 
  and 
  a 
  little 
  convex; 
  dorsal 
  profile 
  of 
  

   head 
  nearly 
  straight, 
  forming 
  an 
  angle 
  of 
  40° 
  to 
  55° 
  with 
  ventral 
  

   contour 
  of 
  head; 
  maxUlary 
  covered 
  by 
  preorbital 
  when 
  mouth 
  is 
  

   closed. 
  A 
  blackish 
  ocellate 
  spot 
  in 
  pel 
  vies 
  and 
  at 
  rear 
  of 
  soft 
  dorsal 
  

   and 
  anal 
  fins; 
  white 
  bar 
  behind 
  eye 
  and 
  on 
  caudal 
  peduncle. 
  

  

  Key 
  to 
  the 
  species 
  of 
  Wetmorella 
  

  

  la. 
  Greatest 
  width 
  of 
  white 
  bar 
  between 
  rear 
  of 
  bases 
  of 
  soft 
  dorsal 
  and 
  of 
  soft 
  

  

  anal 
  fins 
  across 
  caudal 
  peduncle 
  is 
  contained 
  about 
  2.0 
  to 
  4.7 
  times 
  (3.8 
  to 
  

  

  4.7 
  in 
  Red 
  Sea 
  specimens) 
  in 
  least 
  depth 
  of 
  caudal 
  peduncle; 
  white 
  bar 
  on 
  

  

  caudal 
  peduncle 
  completely 
  encircles 
  it; 
  young 
  only, 
  with 
  white 
  bar 
  from 
  

  

  front 
  of 
  spiny 
  dorsal 
  through 
  pectoral 
  base, 
  thence 
  to 
  pelvic 
  base; 
  white 
  

  

  bar 
  behind 
  eye 
  meets 
  its 
  fellow 
  near 
  occiput. 
  

  

  2a. 
  Caudal 
  fin 
  plain 
  dusky, 
  except 
  in 
  smallest 
  specimens 
  there 
  occur 
  2 
  narrow 
  

  

  black 
  cross 
  bars, 
  remainder 
  of 
  fin 
  pale 
  or 
  white; 
  some 
  scales 
  on 
  middle 
  

  

  of 
  sides 
  have 
  black 
  dots; 
  greatest 
  depth 
  about 
  2.4 
  to 
  2.5 
  in 
  standard 
  

  

  length 
  Wetmorella 
  ocellata, 
  new 
  species 
  

  

  2b. 
  Caudal 
  fin 
  with 
  a 
  few 
  black 
  spots 
  on 
  middle 
  rays, 
  at 
  about 
  three-fourths 
  

   their 
  length 
  distally; 
  greatest 
  depth 
  2.4 
  to 
  3.2. 
  

   3a. 
  Greatest 
  width 
  of 
  peduncular 
  white 
  bar 
  ^.3 
  to 
  3.4 
  in 
  least 
  depth 
  of 
  

   caudal 
  peduncle; 
  no 
  white 
  bar 
  in 
  front 
  of 
  ocellate 
  spot 
  in 
  soft 
  dorsal 
  

   and 
  in 
  front 
  of 
  soft 
  anal 
  fins 
  (fig. 
  52). 
  

  

  Wetmorella 
  philippina 
  philippina 
  Fowler 
  

   3b. 
  Greatest 
  width 
  of 
  peduncular 
  white 
  bar 
  3.8 
  to 
  4.7 
  in 
  least 
  depth 
  of 
  caudal 
  

   peduncle; 
  white 
  bar 
  present 
  in 
  front 
  of 
  ocellate 
  spot 
  in 
  soft 
  dorsal 
  and 
  

   in 
  soft 
  anal 
  fins 
  (pi. 
  12, 
  fig. 
  A). 
  

  

  Wetmorella 
  philippina 
  bifasciata, 
  new 
  subspecies 
  

  

  