﻿230 
  

  

  E. 
  EAY 
  LANKESTEE. 
  

  

  Appendages 
  of 
  anterior 
  pair 
  minute 
  and 
  chelate. 
  

  

  'Stylonuridfe 
  (Stylo- 
  

  

  a 
  1 
  1 
  -r, 
  ^ 
  1 
  nurus). 
  

  

  bub-order 
  Jiiurypteromorpna^ 
  Tj, 
  , 
  ^^ 
  ,t^ 
  

  

  •'^ 
  ^ 
  -bjuryptend^e 
  (Euryp- 
  

  

  terus, 
  Slimonia). 
  

  

  Fig. 
  46.— 
  Eurypterus 
  Tisclieri, 
  Eichwald. 
  Silurian 
  of 
  

   E,ootzlkll. 
  Restoration 
  after 
  Schmidt 
  half 
  the 
  size 
  of 
  nature. 
  The 
  

   dorsal 
  aspect 
  is 
  presented, 
  showinj!^ 
  the 
  prosomatic 
  shield, 
  with 
  paired 
  

   compound 
  eyes, 
  and 
  the 
  prosomatic 
  appendages 
  II 
  to 
  VI. 
  Tlie 
  small 
  

   first 
  pair 
  of 
  appendages 
  is 
  concealed 
  from 
  view 
  by 
  the 
  carapace. 
  

   1 
  to 
  12 
  are 
  the 
  somites 
  of 
  the 
  opisthosonia 
  ; 
  13, 
  the 
  post-anal 
  

   spine. 
  (From 
  Zittel's 
  ' 
  Text-book 
  of 
  Palajontology.' 
  Macmillans, 
  

   New 
  York, 
  1896.) 
  

  

  Remarks. 
  — 
  The 
  Gigantostraca 
  are 
  frequently 
  spoken 
  of 
  

   as 
  "the 
  Eurypterines." 
  Not 
  more 
  than 
  thirty 
  species 
  are 
  

  

  