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  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  PLATE 
  S 
  

  

  i 
  Hydnoceras 
  tuberosum 
  Conrad 
  var. 
  glossema 
  

   H. 
  & 
  C. 
  A 
  silicious 
  hexactinellid 
  sponge 
  with 
  markings 
  

   of 
  worm 
  tubes 
  on 
  the 
  inner 
  side 
  of 
  the 
  recticulum. 
  From 
  

   the 
  Chemung 
  group 
  (Upper 
  Devonic) 
  of 
  southwestern 
  

   New 
  York 
  

  

  2 
  Another 
  silicious 
  sponge, 
  Prismodictya 
  telumH. 
  & 
  

  

  C. 
  with 
  similar 
  worm 
  tubes 
  also 
  from 
  the 
  Chemung 
  group 
  

   of 
  New 
  York 
  

  

  3 
  The 
  barnacle 
  Lepidocoleus 
  jamesi 
  of 
  the 
  Lower 
  

  

  Siluric 
  (Cincinnati 
  group) 
  showing 
  the 
  unatrophied 
  con- 
  

   dition 
  of 
  the 
  animal 
  whose 
  segmentation 
  may 
  be 
  regarded 
  

   as 
  represented 
  by 
  the 
  paired 
  valves 
  which 
  meet 
  at 
  the 
  

   edge 
  allowing 
  room 
  for 
  the 
  protrusion 
  of 
  the 
  appendages 
  

   4, 
  5 
  Palaeocreusia 
  devonica 
  Clarke, 
  a 
  barnacle 
  buried 
  

   in 
  a 
  colony 
  of 
  Favosites 
  hemisphericus 
  partly 
  

   by 
  burrowing 
  and 
  partly 
  by 
  overgrowth 
  of 
  the 
  coral. 
  

   From 
  the 
  Onondaga 
  limestone, 
  Leroy, 
  N. 
  Y. 
  

  

  