Vol.  49.] 
IN’  THE  MTJLLION  ISLAND  CHEET. 
217 
Carposphcera,  sp.  6,  PI.  IV.  fig.  3. 
The  outer  test  is  *095  mm.  in  diameter  and  ’007  mm.  in  thick¬ 
ness  ;  the  inner,  *030  mm.  in  diameter.  There  are  from  seven  to 
eight  rays  connecting  the  inner  with  the  outer  test.  No  pores  are 
shown.  Pare. 
Sub-order  Petjnoidea,  Haeckel. 
Cenellipsis ,  sp.  a,  Pl.  IV.  fig.  4. 
Test  regularly  oval,  long  diameter  *220  mm.,  breadth  *185  mm. 
Surface  apparently  smooth,  the  holes  circular  or  oval,  about 
•015  mm.  in  width,  the  lattice-work  less  than  the  width  of  the 
holes.  Wall,  *020  mm.  in  thickness. 
Cenellipsis ,  sp.  b,  PI.  IV.  figs.  5,  6. 
Test  regularly  oval;  length,  *20  mm. ;  breadth,  *165  mm. ;  thickness 
of  wall,  *015  mm.  The  lattice-structure  is  not  clearly  shown.  It 
is  smaller,  and  the  wall  is  thinner  than  in  the  preceding  species. 
Cenellipsis ,  sp.  c,  PI.  IV.  fig.  7. 
Test  elongate  oval ;  length,  *25  mm. ;  breadth,  *18  mm.  The 
apertures  are  circular  or  oval,  unequal  in  size,  from  *010  to  *025  mm. 
in  breadth ;  the  lattice-work  is  less  than  the  width  of  the  apertures. 
Fairly  common.  In  form  and  proportions  the  specimens  agree  with 
Cenellipsis  perovalis,  Rust  Pakeontographica,’  vol.  xxxviii.  1892, 
p.  151,  pl.  xvi.  fig.  4),  from  the  Lower  Carboniferous  of  the  Harz, 
but  the  apertures  of  the  test  are  smaller  and  less  crowded. 
Lithapium ,  sp.,  Pl.  IV.  fig.  8. 
Test  elliptical ;  length,  *18  mm. ;  breadth,  *15  mm.  At  one  end 
is  a  short  conical  spine,  *045  mm.  in  length.  Structure  very  imper¬ 
fectly  shown. 
Lithatractus ,  sp.,  Pl.  IV.  fig.  9. 
The  elliptical  outer  test  is  *110  mm.  in  length  and  *085  mm.  in 
breadth.  The  inner  test  is  *040  mm.  in  diameter  ;  it  is  connected 
by  four  or  five  rays  with  the  outer  test.  Only  one  spine,  *050  mm. 
in  length,  is  preserved,  but  there  are  traces  of  another  at  the 
opposite  end  of  the  test  and  of  some  minute  blunted  spines  (or 
tubercles)  as  well.  The  lattice-structure  is  not  shown. 
Foems  hndeteemined,  Pl.  IV.  figs.  10,  11. 
Fig.  10.  Test  nearly  circular  in  outline ;  length,  *195  mm.;  width, 
*155  mm. ;  with  three  radial  spines :  the  longest  preserved  is 
*195  mm.  in  length.  No  structure  shown. 
Fig.  11.  Test  circular  in  outline,  *2  mm.  in  diameter,  with  two 
long,  tapering,  radial  spines,  about  *2  mm.  in  length,  and  two  short 
secondary  spines.  No  structure  shown. 
