﻿WRIGHT 
  AND 
  ADAMS 
  MALTESE 
  EeniNDDERMS. 
  477 
  

  

  South 
  of 
  France, 
  Spain, 
  Portugal, 
  and 
  Italy, 
  the 
  Islands 
  of 
  Corsica, 
  

   Sardinia, 
  Sicily, 
  Malta, 
  the 
  Ionian 
  Isles, 
  and 
  in 
  Austria, 
  Hungary, 
  

   and 
  Greece. 
  

  

  6. 
  Clype 
  aster 
  alttts, 
  Leske. 
  

  

  Stratigraphical 
  position. 
  — 
  This 
  is 
  an 
  abundant 
  Urchin 
  in 
  the 
  Sand- 
  

   bed 
  No. 
  2, 
  where 
  some 
  very 
  fine 
  specimens 
  are 
  obtained. 
  It 
  is 
  

   likewise 
  found 
  in 
  the 
  Miocene 
  beds 
  of 
  Port-de-Bouc, 
  Saint 
  -Mini 
  ato, 
  

   Tuscany, 
  Nice, 
  Turin, 
  He 
  de 
  Crete, 
  Isle 
  of 
  Capri, 
  Bonifacio, 
  Corsica, 
  

   and 
  Oran. 
  

  

  Collections, 
  — 
  Common 
  in 
  all 
  collections 
  of 
  Miocene 
  fossils. 
  

  

  7. 
  Clypeaster 
  tauricits, 
  Desor. 
  

  

  Clypeaster 
  tauricus, 
  Desor; 
  Agassiz 
  and 
  Desor, 
  Cat. 
  Raisonne, 
  1846, 
  

   p. 
  73. 
  

  

  Clypeaster 
  tauricus, 
  Desor, 
  Synopsis 
  des 
  Echinides 
  Foss., 
  1858, 
  

   p. 
  240. 
  

  

  Clypeaster 
  tauricus, 
  Michelin, 
  Monographe 
  des 
  Clypeastres 
  Foss., 
  

   1861, 
  pis. 
  10 
  & 
  11, 
  p. 
  118. 
  

  

  Test 
  large, 
  pentagonal, 
  elongated, 
  and 
  sinuous, 
  with 
  five 
  rounded 
  

   angles 
  ; 
  lateral 
  and 
  anterior 
  border 
  inflated, 
  posterior 
  flat 
  ; 
  upper 
  

   surface 
  very 
  much 
  elevated 
  under 
  the 
  ambulacra, 
  especially 
  the 
  pos- 
  

   terior 
  pair 
  ; 
  under 
  surface 
  flat, 
  concave 
  towards 
  the 
  mouth-open- 
  

   ing, 
  the 
  five 
  valleys 
  deep 
  and 
  narrow, 
  disappearing 
  at 
  the 
  border. 
  

   Ambulacral 
  summit 
  under 
  the 
  posterior 
  ambulacra. 
  Madreporiform 
  

   body 
  pentagonal, 
  granular, 
  placed 
  beneath 
  the 
  commencement 
  of 
  the 
  

   ambulacra 
  ; 
  ovarian 
  and 
  ocular 
  pores 
  disposed 
  around 
  the 
  circum- 
  

   ference 
  of 
  the 
  body. 
  Ambulacral 
  areas 
  largely 
  open 
  at 
  the 
  lower 
  

   part, 
  much 
  inflated 
  and 
  prominent 
  ; 
  petaloid 
  ambulacra 
  very 
  long, 
  

   extending 
  nearly 
  to 
  the 
  border 
  ; 
  poriferous 
  zones 
  wide, 
  reposing 
  in 
  

   concave 
  depressions 
  ; 
  interporiferous 
  zones 
  elevated 
  slightly 
  above 
  

   the 
  border 
  ; 
  interambulacra 
  narrow, 
  and 
  concave 
  at 
  the 
  border 
  ; 
  tu- 
  

   bercles 
  small, 
  numerous, 
  and 
  regularly 
  arranged 
  on 
  the 
  upper 
  sur- 
  

   face, 
  but 
  closer 
  together 
  and 
  larger 
  at 
  the 
  base, 
  often 
  forming 
  straight 
  

   lines 
  on 
  the 
  interporiferous 
  spaces 
  ; 
  miliary 
  granulations 
  small, 
  nu- 
  

   merous, 
  and 
  visible 
  near 
  the 
  border 
  ; 
  mouth-opening 
  small 
  ; 
  peri- 
  

   stome 
  pentagonal, 
  with 
  deep 
  narrow 
  valleys 
  radiating 
  from 
  the 
  

   angles 
  ; 
  vent 
  small, 
  circular, 
  situated 
  near 
  the 
  border. 
  

  

  Dimensions. 
  — 
  Antero 
  -posterior 
  diameter 
  6| 
  inches; 
  transverse 
  dia- 
  

   meter 
  5^j 
  inches 
  ; 
  height 
  2-\ 
  inches. 
  

  

  Affinities 
  and 
  differences.— 
  -This 
  is 
  one 
  of 
  the 
  largest 
  Clypeasters, 
  

   remarkable 
  for 
  the 
  elevation 
  of 
  the 
  ambulacral 
  above 
  the 
  inter- 
  

   ambulacral 
  areas, 
  the 
  size 
  and 
  depression 
  of 
  the 
  poriferous 
  zones, 
  and 
  

   the 
  wide 
  terminal 
  expansion 
  of 
  the 
  interporiferous 
  spaces. 
  

  

  Localities 
  and 
  Stratigraphical 
  position. 
  — 
  Collected 
  from 
  bed 
  No. 
  1 
  , 
  

   Malta, 
  where 
  it 
  is 
  rare. 
  It 
  is 
  found 
  likewise 
  in 
  the 
  Miocene 
  of 
  

   Mount 
  Taurus, 
  Asia 
  Minor, 
  and 
  in 
  the 
  Isle 
  of 
  Crete. 
  

  

  Collections. 
  — 
  The 
  Earl 
  of 
  Ducie, 
  and 
  my 
  cabinet. 
  

  

  VOL, 
  XX. 
  PART 
  I. 
  2 
  L 
  

  

  