﻿REVISION 
  OF 
  THE 
  GENERA 
  OF 
  MULLETS 
  — 
  SCHULTZ 
  381 
  

  

  JOa. 
  Teeth 
  setiform 
  or 
  ciliforin, 
  in 
  upjxT 
  lip 
  with 
  simple 
  undivided 
  

   tips. 
  

   11a. 
  Teeth 
  numerous 
  in 
  upper 
  jaw 
  in 
  a 
  single 
  row, 
  with 
  simple 
  tips 
  

   rather 
  coarse 
  and 
  incisorlike, 
  firmly 
  set, 
  not 
  ciliform, 
  and 
  

   not 
  forming 
  part 
  of 
  upper 
  lip, 
  but 
  exposed; 
  anterior 
  edge 
  

   of 
  preorbital 
  straight 
  or 
  nearly 
  so; 
  maxillary 
  nearly 
  straight, 
  

   not 
  notably 
  exposed 
  or 
  hooked 
  downward 
  over 
  the 
  pre- 
  

   maxillary 
  (fig. 
  29, 
  a-c) 
  and 
  not 
  extending 
  past 
  rear 
  edge 
  of 
  

   preorbital 
  bone; 
  premaxillary 
  with 
  its 
  anterior 
  margin 
  

   evenly 
  curved, 
  the 
  nondontate 
  posterior 
  part 
  in 
  line 
  with 
  

   toothed 
  portion, 
  not 
  at 
  .sharp 
  angle 
  to 
  it; 
  narrow 
  band 
  of 
  

   teeth 
  on 
  vomer 
  and 
  palatines; 
  scales 
  cycloid 
  (marine 
  and 
  

   fresh 
  waters, 
  Australian 
  region 
  and 
  tropical 
  western 
  

  

  Pacific) 
  Myxus 
  Gunther 
  

  

  lib. 
  Teeth 
  in 
  upper 
  jaw 
  ciliform, 
  flexible, 
  extremely 
  fine 
  end 
  

   numerous, 
  forming 
  part 
  of 
  upper 
  lip. 
  

   18a. 
  Anterior 
  edge 
  of 
  preorbital 
  concave 
  or 
  angular; 
  maxillary 
  

   with 
  its 
  posterior 
  part 
  notably 
  exposed, 
  sharply 
  curved 
  

   downward 
  over 
  posterior 
  part 
  of 
  premaxillary 
  (fig. 
  30, 
  a-d) 
  

   and 
  extending 
  below 
  preorbital 
  a 
  distance 
  greater 
  than 
  

   width 
  between 
  nostrils; 
  premaxillary 
  with 
  its 
  front 
  

   margin 
  sharply 
  angular, 
  nondentate 
  posterior 
  portion 
  

   hooked 
  backward 
  and 
  downward 
  almost 
  at 
  right 
  angles 
  

   to 
  toothed 
  jjortion; 
  vilUform 
  patches 
  of 
  teeth 
  on 
  vomer 
  

   and 
  palatines 
  present 
  or 
  absent; 
  scales 
  cycloid 
  (marine, 
  

   tropical 
  and 
  temperate 
  Atlantic, 
  Pacific, 
  and 
  Indian 
  

   Oceans 
  of 
  Old 
  World, 
  not 
  yet 
  found 
  in 
  New 
  World). 
  

  

  Chelon 
  Rose 
  

   ISb. 
  Anterior 
  margin 
  of 
  preorbital 
  evenly 
  curved 
  or 
  nearly 
  

   straight 
  (fig. 
  31, 
  a-c); 
  maxillary 
  with 
  its 
  posterior 
  part 
  

   somewhat 
  exposed 
  but 
  in 
  line 
  with 
  posterior 
  part 
  of 
  

   premaxillary 
  and 
  not 
  curved 
  downward, 
  but 
  ending 
  

   about 
  opposite 
  posterior 
  edge 
  of 
  preorbital; 
  premaxillary 
  

   with 
  its 
  front 
  margin 
  evenly 
  curved; 
  a 
  narrow 
  band 
  of 
  

   villiform 
  tectli 
  present 
  on 
  vomer 
  and 
  palatines; 
  scales 
  

   ctenoid 
  (fresh 
  waters, 
  possibly 
  l)rackish 
  too, 
  Australia, 
  

  

  Burma, 
  and 
  South 
  Africa) 
  Trachystoma 
  Ogilby 
  

  

  10b. 
  Teeth 
  in 
  upper 
  lip 
  setiform 
  rather 
  firmly 
  sot, 
  with 
  trifid 
  or 
  l)ifid 
  

   ti[)3; 
  teeth 
  in 
  lower 
  jaw 
  ciliform 
  and 
  embedded 
  more 
  or 
  less 
  

   in 
  thin 
  edged 
  lower 
  lip; 
  anterior 
  edge 
  of 
  preorbital 
  concave; 
  

   maxillary 
  with 
  its 
  posterior 
  part 
  notably 
  expo.sed, 
  sharply 
  

   curvcfl 
  downward 
  over 
  posterior 
  part 
  of 
  jircmaxillary 
  and 
  

   extending 
  below 
  preorbital 
  a 
  distance 
  greater 
  than 
  width 
  

   between 
  nostrils; 
  premaxillary 
  with 
  its 
  front 
  margin 
  sharply 
  

   angular, 
  nondentate 
  posterior 
  portion 
  hooked 
  backward 
  and 
  

   downward 
  at 
  a 
  sharp 
  angle; 
  villiform 
  patches 
  of 
  teeth 
  on 
  

   vomer 
  and 
  palatines; 
  scales 
  cycloid 
  (marine. 
  South 
  Africa). 
  

  

  Heterotnugil, 
  new 
  genus 
  

  

  In 
  speciilutiii^ 
  on 
  llio 
  rolationsliips 
  uuiou}; 
  [\w. 
  giMioni 
  of 
  Muj^iliduo, 
  

   I 
  Hhould 
  assiiino 
  that 
  tlio 
  luost 
  priinitivo 
  inullot 
  hud 
  uiidori^'oiio 
  the 
  

   Joast 
  amount 
  of 
  spocialization. 
  Suoli 
  a 
  miiUot 
  should 
  retain 
  largely 
  

   unmodified 
  tooth 
  in 
  htuids 
  on 
  jaws, 
  vomer, 
  and 
  palatines. 
  The 
  

  

  