﻿14 
  

  

  H. 
  WOODWARD 
  ON 
  FORMS 
  

  

  h 
  

  

  *£> 
  

  

  3 
  

  

  «, 
  

  

  reminded 
  me 
  at 
  once 
  of 
  what 
  Chla- 
  

   myclosaurus 
  or 
  Cornpsognathus 
  might 
  

   produce 
  under 
  favourable 
  condi- 
  

   tions. 
  The 
  slab 
  presents 
  a 
  median 
  

   track 
  formed 
  by 
  the 
  tail 
  drawn 
  along 
  

   on 
  the 
  ground; 
  the 
  two 
  hind 
  feet 
  

   with 
  outspread 
  toes 
  leave 
  their 
  mark, 
  

   whilst 
  the 
  fore 
  paws 
  just 
  touch 
  the 
  

   ground, 
  leaving 
  a 
  dot-like 
  impression 
  

   on 
  either 
  side 
  of 
  the 
  median 
  line 
  

   (see 
  figure). 
  Dr. 
  Oppel 
  has 
  named 
  

   this 
  track 
  Ichnites 
  Uthographicus*. 
  

  

  In 
  calling 
  attention 
  to 
  the 
  slab, 
  

   Dr. 
  Oppel 
  remarks 
  that 
  the 
  foot- 
  

   steps 
  are 
  ranged 
  in 
  two 
  parallel 
  lines 
  

   with 
  a 
  middle 
  continuous 
  impres- 
  

   sion 
  alternately 
  stronger 
  and 
  fainter. 
  

   The 
  footsteps 
  go 
  in 
  pairs. 
  It 
  re- 
  

   sembles 
  no 
  other 
  form 
  of 
  track 
  

   already 
  noticed 
  or 
  described 
  from 
  

   this 
  or 
  any 
  other 
  formation. 
  

  

  Dr. 
  Oppel 
  thinks 
  Archceopteryx 
  

   might 
  have 
  formed 
  such 
  a 
  track, 
  

   although 
  he 
  is 
  unable 
  to 
  explain 
  the 
  

   alternate 
  deepening 
  of 
  the 
  middle 
  

   track. 
  

  

  Remembering 
  that 
  the 
  tail 
  of 
  Ar- 
  

   chceopteryx 
  is 
  bordered 
  all 
  the 
  way 
  

   by 
  feathers, 
  it 
  will 
  at 
  once 
  be 
  seen 
  

   that 
  it 
  could 
  not 
  leave 
  behind 
  a 
  clear 
  

   and 
  simple 
  furrow, 
  but 
  a 
  broad 
  

   smudge 
  composed 
  of 
  many 
  lines, 
  like 
  

   that 
  left 
  by 
  a 
  flat 
  colour-brush 
  drawn 
  

   along 
  upon 
  paper. 
  

  

  The 
  tail 
  of 
  a 
  lizard 
  progressing 
  by 
  

   hops 
  and 
  supporting 
  itself 
  upon 
  its 
  

   hind 
  limbs 
  and 
  tail, 
  would, 
  however, 
  

   produce 
  just 
  such 
  impressions, 
  the 
  

   deepening 
  of 
  the 
  furrow 
  made 
  by 
  

   the 
  tail 
  being 
  caused 
  by 
  the 
  depres- 
  

   sion 
  of 
  the 
  tail 
  in 
  making 
  each 
  on- 
  

   ward 
  hop. 
  

  

  Viewed 
  "by 
  the 
  additional 
  light 
  

   which 
  our 
  present 
  knowledge 
  of 
  the 
  

   structure 
  of 
  the 
  Mesozoic 
  Dinosauria 
  

   and 
  of 
  the 
  existing 
  Clilamydosaurus 
  

  

  * 
  Palaontologische 
  Mittheilungen 
  aus 
  

   dem 
  Museum 
  des 
  Konigl. 
  Bayer. 
  Staates 
  

   von 
  Dr. 
  Albert 
  Oppel. 
  Stuttgardt, 
  1862, 
  

   tab. 
  39, 
  p. 
  121. 
  

  

  