﻿REVISION 
  OF 
  THE 
  GENERA 
  OF 
  MILLETS 
  — 
  SCHULTZ 
  383 
  

  

  Tlie 
  lips, 
  teeth, 
  preorbital 
  bone, 
  and 
  jaws 
  of 
  the 
  MugUidae 
  seem 
  to 
  

   have 
  become 
  diliVrentiated 
  more 
  tlian 
  other 
  charaeters. 
  This 
  genus 
  

   appears 
  to 
  have 
  had 
  its 
  mouth 
  struetures 
  more 
  complicated 
  and 
  

   speeiahzed 
  than 
  any 
  other 
  genus 
  of 
  mullets. 
  

  

  Cesiraeus 
  is 
  characterized 
  by 
  the 
  specialist 
  d 
  lower 
  jjiw 
  ami 
  by 
  Lui; 
  

   thick 
  lips 
  on 
  both 
  jaws; 
  the 
  lower 
  jaw 
  is 
  devoid 
  of 
  teeth; 
  externally 
  

   there 
  occurs 
  on 
  each 
  side 
  of 
  the 
  mandible 
  along 
  the 
  lateral 
  edge 
  a 
  wide 
  

   strip 
  of 
  transverse, 
  very 
  close-set, 
  membranous 
  lamellae; 
  posteriorly 
  

   the 
  mandible 
  ends 
  iii 
  four 
  bluntly 
  rounded 
  lobes, 
  free 
  posteriorly; 
  

   the 
  posterior 
  end 
  of 
  the 
  upper 
  lip 
  forms 
  another 
  pair 
  of 
  fleshy 
  lobes; 
  

   premaxillary 
  with 
  a 
  row 
  of 
  setiform 
  teeth, 
  tips 
  simple; 
  tip 
  of 
  lower 
  jaw 
  

   without 
  symphyseal 
  knolj; 
  scales 
  ctenoid; 
  front 
  edge 
  of 
  preorbital 
  

   without 
  concavity 
  and 
  scarcely 
  or 
  not 
  serrated; 
  maxillary 
  and 
  pre- 
  

   maxillary 
  not 
  bent 
  downward 
  in 
  line 
  with 
  front 
  edge 
  of 
  preorbital, 
  

   the 
  former 
  extending 
  far 
  behind 
  the 
  latter; 
  nostrils 
  in 
  lino 
  with 
  upper 
  

   edge 
  of 
  orbit, 
  close 
  together, 
  remote 
  from 
  groove 
  behind 
  upper 
  lip; 
  

   adipose 
  eyelid 
  absent; 
  apparently 
  no 
  teeth 
  on 
  vomer, 
  palatines 
  or 
  

   tongue 
  ; 
  posterior 
  edge 
  of 
  preorbital 
  w4de, 
  serrated; 
  margin 
  of 
  lower 
  jaw 
  

   acutely 
  angular; 
  gill 
  membranes 
  extending 
  far 
  forward 
  not 
  broadly 
  

   joined 
  across 
  isthums. 
  

  

  The 
  following 
  collections 
  were 
  studied: 
  U. 
  S. 
  N. 
  M. 
  No. 
  122819 
  

   from 
  New 
  Guinea; 
  No. 
  1372G6 
  from 
  Bouro 
  Island, 
  Dutch 
  East 
  Indies; 
  

   and 
  No. 
  1:^7207 
  from 
  the 
  Philippines. 
  

  

  Genus 
  JOTURUS 
  Poey 
  

  

  JoliiTu.-i 
  1 
  ur.^. 
  Memorial 
  sobre 
  la 
  historia 
  natural 
  dc 
  la 
  Isla 
  de 
  Cuba, 
  vol. 
  2, 
  

   p. 
  263, 
  pi. 
  IS, 
  fig.s. 
  4-5, 
  1800 
  (genotype, 
  Jolurus 
  pichordi 
  Poey) 
  (Cuba). 
  

  

  Xenorhynchichthys 
  Rega.n, 
  Ann. 
  Mag. 
  Nat. 
  Ili.st., 
  .ser. 
  8, 
  vol. 
  2, 
  p. 
  461, 
  1908 
  

   (genotype, 
  Xenorhynchichlliys 
  stipes 
  (Jordan 
  and 
  GUhcrt) 
  = 
  J 
  oturvs 
  stipes 
  

   Jordan 
  and 
  Gilbert) 
  (Rfo 
  Bayano 
  near 
  Panama). 
  

  

  I 
  have 
  examined 
  the 
  type 
  of 
  Joturus 
  stipes 
  fh)r(hin 
  and 
  Gilbert 
  

   (U. 
  S. 
  N. 
  \I. 
  No. 
  ;il010 
  fiom 
  Panama) 
  and 
  refer 
  it 
  to 
  this 
  genus. 
  

  

  This 
  genus 
  is 
  characterized 
  by 
  the 
  very 
  thick 
  lips 
  in 
  both 
  jaws, 
  

   devoid 
  of 
  teeth 
  in 
  the 
  lips, 
  and 
  with 
  the: 
  liesiiy 
  snout 
  projecting 
  be- 
  

   yond 
  the 
  lips 
  so 
  that 
  the 
  mouth 
  is 
  somewhat 
  iiiferioi- 
  in 
  position, 
  

   nearly 
  horizontal; 
  behind 
  ii])p( 
  r 
  lip 
  on 
  up()er 
  jaw 
  occurs 
  a 
  band 
  of 
  

   incisorlike 
  multicusjjid 
  teeth, 
  ea<h 
  side 
  of 
  lower 
  jaw 
  with 
  a 
  patch 
  of 
  

   similar 
  multicuspid 
  teeth 
  widely 
  separated 
  at 
  symphysis; 
  no 
  symphys- 
  

   eal 
  knob 
  on 
  lower 
  jaw; 
  scales 
  ctenoid; 
  the 
  front 
  edge 
  of 
  the 
  preorbital 
  

   is 
  nearly 
  straight 
  without 
  concavity 
  and 
  not 
  serrated; 
  maxillary 
  and 
  

   premaxillary 
  not 
  bent 
  downward 
  posteriorly, 
  but 
  in 
  line 
  with 
  front 
  

   edge 
  of 
  preorbital; 
  the 
  nostrils 
  are 
  in 
  line 
  with 
  u|)per 
  edge 
  of 
  orbit, 
  

   very 
  close 
  together, 
  remote 
  from 
  front 
  of 
  snoiil 
  ; 
  adipose 
  eyelid 
  absent; 
  

   te(>th 
  present 
  on 
  vomer, 
  palatines, 
  and 
  on 
  tongue 
  in 
  small 
  patches; 
  

   posterior 
  end 
  of 
  preorbital 
  ending 
  in 
  a 
  point 
  vent 
  rally; 
  margin 
  of 
  

  

  