﻿OF 
  THE 
  WEDLOCK 
  SHALES, 
  393 
  

  

  Fig. 
  12. 
  Tentaculites 
  wenlockianus 
  ; 
  a 
  nearly 
  transparent 
  section, 
  showing 
  the 
  

   peculiar 
  structure 
  of 
  the 
  superior 
  ambulations 
  seen 
  in 
  all 
  true 
  

   Tentaculites. 
  a, 
  b, 
  c, 
  as 
  in 
  fig. 
  11. 
  

   13. 
  One 
  of 
  the 
  superior 
  annulations, 
  X 
  110. 
  

  

  Discussion. 
  

  

  Dr. 
  Hixde 
  said 
  he 
  had 
  seen 
  the 
  specimens, 
  which 
  were 
  minute 
  

   and 
  fragmentary, 
  but 
  yet 
  exhibited 
  microscopic 
  characters 
  which 
  

   might 
  be 
  relied 
  on 
  for 
  specific 
  description. 
  He 
  was 
  not 
  quite 
  

   satisfied 
  that 
  some 
  of 
  the 
  specimens 
  placed 
  in 
  the 
  genus 
  Psammo- 
  

   siphon 
  were 
  really 
  palaeozoic. 
  The 
  specimen 
  placed 
  with 
  a 
  query 
  

   under 
  the 
  genus 
  (Enonites 
  appeared 
  to 
  be 
  merely 
  a 
  fragment 
  of 
  a 
  

   polyzoan, 
  and 
  not 
  the 
  jaw 
  of 
  an 
  Annelid. 
  He 
  agreed 
  with 
  the 
  author 
  

   in 
  placing 
  Tentaculites 
  among 
  the 
  Annelids 
  ; 
  its 
  close 
  resemblance 
  

   to 
  Conchicolites 
  and 
  Ortonia 
  showed 
  its 
  affinities 
  to 
  be 
  with 
  the 
  

   Worms 
  rather 
  than 
  with 
  the 
  pelagic 
  Mollusca, 
  notwithstanding 
  that 
  

   it 
  was 
  a, 
  free 
  form. 
  

  

  