﻿390 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  posterior 
  edge 
  of 
  preorbital 
  very 
  wide, 
  much 
  wider 
  than 
  space 
  between 
  

   nostrils; 
  margin 
  of 
  lower 
  jaw 
  rounded; 
  gill 
  membranes 
  extending 
  far 
  

   forward, 
  not 
  broadly 
  connected 
  across 
  isthmus. 
  

  

  The 
  diagnosis 
  of 
  this 
  genus 
  was 
  based 
  on 
  M. 
  elongatus, 
  U. 
  S. 
  N. 
  M. 
  

   Nos. 
  47770 
  and 
  47773 
  from 
  Lord 
  Howe 
  Island 
  and 
  Nos. 
  59889, 
  59913, 
  

   and 
  83052 
  from 
  New 
  South 
  Wales. 
  

  

  Figure 
  29. 
  — 
  Sketches 
  of 
  the 
  maxillary, 
  premaxillary, 
  and 
  preorbital 
  bones 
  of 
  Myxus 
  

   elongatus 
  (U. 
  S. 
  N. 
  M. 
  No. 
  59912 
  from 
  New 
  South 
  Wales): 
  a, 
  Maxillary 
  lying 
  over 
  pre- 
  

   maxillary 
  (a 
  tooth 
  is 
  shown 
  below 
  at 
  right 
  hand 
  side); 
  b, 
  view 
  of 
  ventral 
  contour 
  of 
  

   maxillary; 
  c, 
  preorbital. 
  

  

  Figure 
  30. 
  — 
  Sketches 
  of 
  the 
  maxillary, 
  premaxillary, 
  and 
  preorbital 
  bones 
  of 
  Ckelon 
  chelo 
  

   (U. 
  S. 
  N. 
  M. 
  No. 
  123002 
  from 
  Europe): 
  a, 
  Maxillary 
  lying 
  over 
  premaxillary; 
  b, 
  view 
  of 
  

   ventral 
  contour 
  of 
  maxillary; 
  c, 
  preorbital; 
  d, 
  posterior 
  tips 
  of 
  maxillary 
  and 
  premaxillary. 
  

  

  