﻿338 
  ME. 
  K. 
  B. 
  NEWTON 
  ON 
  FOSSILS 
  FEOM 
  MADAGASCAB. 
  

  

  3. 
  Stomecelinus 
  (allied 
  to) 
  bigeanulaeis, 
  Lamarck 
  (sp.), 
  1816. 
  

   (PI. 
  XIV. 
  figs. 
  13-15.) 
  

  

  The 
  test 
  of 
  this 
  specimen 
  is 
  more 
  depressed 
  than 
  in 
  the 
  typical 
  

   form, 
  less 
  pentagonal 
  in 
  shape, 
  and 
  the 
  tubercles 
  are 
  rather 
  more 
  

   numerous. 
  The 
  mouth-opening 
  is 
  much 
  iujured 
  and 
  incomplete, 
  and 
  

   only 
  one 
  of 
  the 
  notches 
  in 
  the 
  peristome 
  is 
  indistinctly 
  preserved. 
  

   The 
  tubercles 
  are 
  raised 
  on 
  bosses 
  surrounded 
  by 
  smooth 
  areolae, 
  

   each 
  areola 
  being 
  encircled 
  by 
  a 
  series 
  of 
  granules. 
  The 
  base 
  of 
  

   the 
  test 
  is 
  ornamented 
  with 
  well-developed 
  tubercles, 
  and 
  is 
  in 
  

   contrast 
  with 
  the 
  comparatively 
  smooth 
  appearance 
  of 
  the 
  upper 
  

   surface. 
  The 
  anal 
  opening 
  is 
  large 
  (5 
  millim. 
  diameter), 
  and 
  sur- 
  

   rounded 
  by 
  a 
  series 
  of 
  granules 
  which 
  border 
  a 
  well-developed 
  apical 
  

   disc, 
  the 
  details 
  of 
  which 
  are 
  very 
  clear 
  and 
  specific. 
  The 
  perfora- 
  

   tions 
  of 
  the 
  oculars 
  appear 
  to 
  be 
  elongate 
  in 
  shape, 
  in 
  the 
  genitals 
  

   they 
  are 
  round. 
  Two 
  or 
  three 
  granules 
  are 
  also 
  present 
  on 
  the 
  

   ocular 
  plates. 
  The 
  structure 
  of 
  the 
  ambulacral 
  and 
  interambulacral 
  

   areas 
  is 
  much 
  the 
  same 
  as 
  in 
  the 
  species 
  to 
  which 
  I 
  have 
  referred 
  

   this 
  specimen 
  ; 
  the 
  poriferous 
  zones 
  are 
  narrow, 
  the 
  pores 
  being 
  

   arranged 
  in 
  trigeminal 
  pairs. 
  

  

  Dimensions. 
  — 
  Diameter 
  = 
  37 
  millim. 
  ; 
  height=22. 
  

  

  Lower 
  Oolite 
  (England 
  : 
  France). 
  South-west 
  Madagascar. 
  

   Collected 
  by 
  the 
  Rev. 
  J. 
  Richardson. 
  

  

  Actinozoa 
  (Corals). 
  

  

  Isastrcea 
  and, 
  probably, 
  Thamnastrcea, 
  the 
  structures 
  of 
  which 
  are 
  

   badly 
  preserved 
  and 
  indistinct. 
  The 
  former 
  may 
  probably 
  be 
  

   Isastrcea 
  Fischeri 
  (Fromentel, 
  MS.), 
  Fischer, 
  1873, 
  Comptes 
  Rendus, 
  

   1873, 
  vol. 
  76, 
  p. 
  113 
  ; 
  but 
  as 
  the 
  description 
  of 
  that 
  species 
  is 
  

   unaccompanied 
  by 
  a 
  figure, 
  it 
  is 
  of 
  little 
  value. 
  

  

  Lias, 
  five 
  or 
  six 
  miles 
  south 
  of 
  Ankaramy. 
  

  

  EXPLANATION 
  OF 
  PLATE 
  XIV. 
  

  

  Figs. 
  1, 
  2. 
  Stephanoceras 
  (Ammonites) 
  Herveyi, 
  front 
  and 
  side 
  views. 
  

   3, 
  4. 
  Belemnites 
  polygonalis, 
  lateral 
  view 
  and 
  transverse 
  section. 
  

  

  5. 
  Nerita 
  Buvignieri, 
  dorsal 
  view. 
  

   6-8. 
  Sphcsra 
  madagascariensis 
  (n. 
  sp.), 
  exterior, 
  interior, 
  and 
  profile 
  views. 
  

   9. 
  Astarte 
  (?) 
  Baroni 
  (n. 
  sp.), 
  side 
  view. 
  

  

  10. 
  Ditto, 
  posterior 
  view, 
  showing 
  escutcheon. 
  

  

  11. 
  Ditto, 
  anterior 
  view, 
  showing 
  lunule. 
  

  

  12. 
  Alectryonia 
  (Ostrea) 
  itngulata, 
  dorsal 
  view 
  of 
  left 
  valve. 
  

  

  13. 
  Stomechinus 
  (allied 
  to) 
  bigramdaris, 
  upper 
  surface. 
  

  

  14. 
  Ditto, 
  apical 
  disk. 
  X 
  2. 
  

  

  15. 
  Ditto, 
  ambulacral 
  and 
  interambulacral 
  plates, 
  with 
  poriferous' 
  zones. 
  

  

  X4. 
  

  

  16. 
  Assilina 
  spira. 
  

  

  17. 
  Nummidities 
  biaritzensis. 
  X 
  2. 
  

  

  18. 
  Alveolina 
  oblonga. 
  

  

  19. 
  Ditto, 
  showing 
  transverse 
  strise. 
  X 
  3. 
  

  

  