﻿148 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MU8EVM. 
  vol. 
  44. 
  

  

  Genus 
  MONOMITOPUS 
  Alcock. 
  

  

  Monomitopus 
  Alcock, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  p. 
  297, 
  Oct., 
  1890, 
  nigripinne. 
  

   Dicromita 
  Goode 
  and 
  Bean, 
  Oceanic 
  Ichthyology, 
  p. 
  319, 
  1895, 
  agassizii. 
  

  

  This 
  genus 
  differs 
  from 
  NeohytMtes 
  in 
  the 
  weaker, 
  more 
  spongy 
  

   character 
  of 
  the 
  bones 
  of 
  the 
  head; 
  scales 
  more 
  deciduous; 
  lower 
  

   margin 
  of 
  preopercle 
  more 
  produced, 
  armed 
  w^th 
  2 
  or 
  3 
  weak 
  spine- 
  

   like 
  i)rojections 
  and 
  with 
  a 
  distinct 
  incision 
  in 
  region 
  of 
  angle; 
  ven- 
  

   trals 
  reduced, 
  inserted 
  close 
  together, 
  each 
  of 
  2 
  closely 
  united 
  rays, 
  

   not 
  separate 
  at 
  tips. 
  The 
  ring 
  of 
  pyloric 
  coeca 
  around 
  the 
  pylorus 
  

   may 
  or 
  may 
  not 
  extend 
  on 
  neighboring 
  jiart 
  of 
  gut. 
  The 
  type 
  of 
  

   Dicromita 
  {agassizii) 
  does 
  not 
  differ 
  generically 
  from 
  Monomitopus. 
  

  

  MONOMITOPUS 
  PALLIDUS 
  Smith 
  and 
  Radcliffe, 
  new 
  species. 
  

   Plate 
  9, 
  fig. 
  1. 
  

  

  Dorsal 
  93; 
  caudal 
  7; 
  anal 
  76; 
  ventrals 
  1; 
  pectorals 
  28. 
  

  

  Head 
  4.73 
  (5.22 
  in 
  total 
  length), 
  short 
  cavernous, 
  subquadrangular 
  

   in 
  transverse 
  section, 
  slightly 
  arched 
  posteriorly; 
  body 
  short, 
  com- 
  

   pressed, 
  greatest 
  depth 
  5.56 
  (6.12 
  in 
  total 
  length); 
  eye 
  3.90, 
  large, 
  

   elUptical-oval; 
  snout 
  3.90, 
  short, 
  broad, 
  slightly 
  overhanging 
  mouth; 
  

   mouth 
  of 
  moderate 
  size, 
  obHque, 
  upper 
  jaw 
  overhanging 
  lower; 
  maxil- 
  

   lary 
  1.94, 
  reaching 
  a 
  little 
  beyond 
  vertical 
  from 
  posterior 
  margin 
  of 
  

   eye, 
  posterior 
  end 
  expanded, 
  truncate, 
  its 
  width 
  more 
  than 
  0.5 
  an 
  eye- 
  

   diameter; 
  teeth 
  small, 
  villiform, 
  the 
  outer 
  row 
  in 
  jaws 
  somewhat 
  

   enlarged, 
  differing 
  in 
  this 
  respect 
  from 
  the 
  other 
  PhiHppine 
  species; 
  

   patch 
  on 
  vomer 
  /^-shaped; 
  interorbital 
  3.36, 
  broad, 
  convex; 
  nostrils 
  

   widely 
  separated, 
  anterior 
  without 
  well-developed 
  tube; 
  opercle 
  

   armed 
  with 
  a 
  single 
  sharp 
  spine 
  ; 
  angle 
  of 
  preopercle 
  formed 
  as 
  in 
  the 
  

   subgenus 
  Watasea, 
  with 
  2 
  sharp 
  spines, 
  the 
  lower 
  being 
  nearly 
  as 
  

   strong 
  as 
  in 
  the 
  species 
  of 
  that 
  subgenus; 
  pseudobranchife 
  distinct, 
  

   slender; 
  gill-rakers 
  7 
  + 
  16, 
  long, 
  slender, 
  the 
  longest 
  about 
  0.66 
  diame- 
  

   ter 
  of 
  eye; 
  a 
  ring 
  of 
  11 
  small 
  finger-like 
  coeca 
  extending 
  around 
  the 
  

   P34orus, 
  one 
  on 
  each 
  side 
  being 
  on 
  the 
  neighboring 
  part 
  of 
  the 
  gut; 
  

   scales 
  small, 
  cycloid, 
  deciduous, 
  covering 
  head 
  and 
  body, 
  and 
  forming 
  

   a 
  sheath 
  along 
  base 
  of 
  dorsal 
  and 
  anal, 
  about 
  8 
  in 
  a 
  series 
  from 
  origin 
  

   of 
  dorsal 
  to 
  and 
  including 
  lateral 
  line; 
  the 
  surface 
  of 
  the 
  scale 
  is 
  

   intermediate 
  between 
  that 
  found 
  in 
  species 
  of 
  NeohytMtes 
  and 
  other 
  

   Philippine 
  species 
  of 
  Monomitopus, 
  the 
  radiating 
  striae 
  persisting 
  over 
  

   entire 
  surface 
  of 
  scale, 
  these 
  are 
  much 
  more 
  rudimentary 
  in 
  character 
  

   than 
  in 
  species 
  of 
  NeohytMtes; 
  lateral 
  line 
  broad, 
  distinct 
  anteriorly, 
  

   disappearmg 
  at 
  a 
  point 
  about 
  equal 
  to 
  length 
  of 
  head 
  from 
  base 
  of 
  

   caudal. 
  

  

  Dorsal 
  and 
  anal 
  continuous 
  with 
  caudal, 
  the 
  last 
  rays 
  extending 
  

   nearly 
  to 
  middle 
  of 
  caudal 
  fin 
  ; 
  distance 
  of 
  dorsal 
  from 
  tip 
  of 
  snout 
  4.12 
  

   (4.54 
  in 
  total 
  length); 
  distance 
  of 
  anal 
  from 
  tip 
  of 
  snout 
  2.25 
  (2.47 
  

   in 
  total 
  length) 
  ; 
  distance 
  of 
  anal 
  from 
  lower 
  pectoral 
  base 
  about 
  equal 
  

  

  