﻿236 
  

  

  E. 
  RAY 
  LANKKSTER. 
  

  

  a 
  modern 
  scorpion 
  only 
  in 
  the 
  tliickuess 
  of 
  its 
  legs, 
  and 
  in 
  

   their 
  terminating 
  in 
  strong 
  spike-like 
  joints, 
  instead 
  of 
  being 
  

   slight, 
  and 
  provided 
  with 
  a 
  pair 
  of 
  terminal 
  claws. 
  The 
  legs 
  

   of 
  the 
  modern 
  scorpion 
  (Fig. 
  10 
  : 
  Fig. 
  51) 
  are 
  those 
  of 
  a 
  

   terrestrial 
  Arthropod, 
  such 
  as 
  a 
  beetle 
  ; 
  whilst 
  those 
  of 
  the 
  

   vSilurian 
  scorpion 
  are 
  the 
  legs 
  of 
  an 
  aquatic 
  Arthropod, 
  snchas 
  

   a 
  crab 
  or 
  lobster. 
  It 
  is 
  probable 
  that 
  the 
  Silurian 
  scorpion 
  

   was 
  an 
  aquatic 
  animal, 
  and 
  that 
  its 
  respiratory 
  lamellaB 
  were 
  

   still 
  projecting 
  from 
  the 
  surface 
  of 
  the 
  body 
  to 
  serve 
  as 
  

   branchiae. 
  No 
  trace 
  of 
  ^' 
  stigmata," 
  the 
  orifices 
  of 
  the 
  lung- 
  

   chambers 
  of 
  modern 
  scorpions, 
  can 
  be 
  found 
  in 
  the 
  Scottish 
  

  

  Fig. 
  51. 
  — 
  Drawiiif^ 
  from 
  life 
  of 
  the 
  desert 
  Scorpion, 
  Biit.lius 
  

   australis, 
  Lin., 
  from 
  Biskra, 
  N. 
  AlVicii. 
  (From 
  Lankcbter, 
  ' 
  Jouni. 
  

   Linn. 
  Soc. 
  Zoo!.,' 
  vol. 
  xvi, 
  18SL) 
  

  

  specimen 
  of 
  Paleeophonus, 
  which 
  presents 
  the 
  ventral 
  surface 
  

   of 
  the 
  animal 
  to 
  view. 
  On 
  the 
  other 
  hand, 
  no 
  trace 
  of 
  respira- 
  

   tory 
  appendages, 
  excepting 
  the 
  pecteus, 
  can 
  be 
  detected 
  in 
  

   the 
  specimen 
  (see 
  Fig. 
  49). 
  

  

  Fossil 
  scorpions 
  of 
  the 
  modern 
  type 
  are 
  found 
  in 
  the 
  Coal 
  

   Measures. 
  At 
  the 
  present 
  day 
  scorpions 
  of 
  various 
  genera 
  

   are 
  found 
  in 
  all 
  the 
  warm 
  regions 
  of 
  the 
  world. 
  In 
  Europe 
  

   they 
  occur 
  as 
  far 
  north 
  as 
  Bavaria 
  and 
  the 
  south 
  of 
  France 
  

   The 
  largest 
  species 
  measure 
  nine 
  inches 
  from 
  the 
  front 
  of 
  the 
  

  

  