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  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  III. 
  Table 
  of 
  the 
  Stratigraphical 
  Distribution 
  of 
  the 
  Echinoderms. 
  

   By 
  Dr. 
  Wright, 
  F.B.S., 
  F.G.S. 
  

  

  Genera 
  and 
  Species. 
  

  

  No. 
  1. 
  

  

  Upper 
  

   Lime- 
  

   stone. 
  

  

  No. 
  2. 
  

  

  Sand- 
  

   bed. 
  

  

  No. 
  3. 
  

  

  Marl. 
  

  

  No. 
  4. 
  

  

  Calc. 
  

   Sand- 
  

   stone. 
  

  

  No. 
  5. 
  

  

  Lower 
  

   Lime- 
  

   stone. 
  

  

  Cidaris 
  Melitensis, 
  Forbes 
  

  

  Scilke, 
  Wright 
  

  

  Adamsi, 
  Wright 
  

  

  Psammechinus 
  Duciei, 
  Wright 
  

   Scillae, 
  Wright 
  

  

  Clypeaster 
  altus, 
  LesJce 
  

  

  tauricus, 
  Desor 
  , 
  

  

  marginatum, 
  Lamarck 
  . 
  . 
  . 
  

  

  Keidi, 
  Wright 
  

  

  portentosus, 
  Desmoulins 
  

  

  latirostris, 
  Agassiz 
  

  

  Scutella 
  subrotunda, 
  LesJce 
  

  

  Pygorhynchus 
  Vassali, 
  Wright 
  

   Spratti, 
  Wright 
  

  

  Echinolampas 
  Hayesianus, 
  Desor 
  

  

  Laurillardi, 
  Agassiz 
  

  

  hemisphasricus, 
  Lamarck 
  . 
  . 
  . 
  

  

  scutiformis, 
  LesJce 
  

  

  Amblypygus 
  Melitensis, 
  Wright 
  

   Conoclypus 
  plagiosomus, 
  Agassiz 
  

  

  Hemiaster 
  Cotteaui, 
  Wright 
  

  

  Scillse, 
  Wright 
  

  

  Brissopsis 
  Duciei, 
  Wright 
  

  

  G-rateloupi, 
  Sismonda 
  . 
  

  

  Schizaster 
  Scillse, 
  Desmoulins. 
  

  

  — 
  Parkin 
  soni, 
  Def 
  ranee 
  

  

  Desori, 
  Wright 
  

  

  Pericosmus 
  latus, 
  Agassiz 
  

  

  Toxobrissus 
  crescenticus, 
  Wright 
  

   Prenaster 
  excentricus, 
  Wright 
  . 
  . 
  

  

  Brissus 
  latus, 
  Wright 
  

  

  cylindricus, 
  Agassiz 
  

  

  — 
  imbricatus, 
  Wright 
  

  

  tuberculatus, 
  Wright 
  

  

  Eupatagus 
  Konincki, 
  Wright. 
  . 
  

   Spatangus 
  ocellatus, 
  Defrance 
  

  

  delphinus, 
  Defrance 
  

  

  pustulosus, 
  Wright 
  

  

  EXPLANATION 
  OF 
  PLATES 
  XXI. 
  AND 
  XXII. 
  

  

  Plate 
  XXI. 
  

  

  Fig. 
  1 
  a. 
  Spatangus 
  ocellatus, 
  Defrance. 
  Upper 
  surface, 
  natural 
  size. 
  

  

  1 
  b. 
  , 
  Defrance. 
  Under 
  surface, 
  natural 
  size. 
  

  

  2. 
  pustulosus, 
  Wright. 
  Upper 
  surface, 
  reduced 
  one-half. 
  

  

  3 
  a. 
  Amblypygus 
  Melitensis, 
  Wright. 
  Upper 
  surface, 
  natural 
  size. 
  

   3 
  b. 
  , 
  Wright. 
  Under 
  surface, 
  natural 
  size. 
  

  

  3 
  c. 
  , 
  Wright. 
  Lateral 
  view, 
  natural 
  size. 
  

  

  4 
  a. 
  Echinolampas 
  scutiformis, 
  Leske. 
  Upper 
  surface, 
  reduced 
  one-half. 
  

   4 
  b. 
  , 
  Leske. 
  Lateral 
  view, 
  reduced 
  one-half. 
  

  

  5. 
  Cidaris 
  Adamsi, 
  Wright. 
  Interambulacral 
  areas, 
  natural 
  size. 
  

  

  