242 
ME.  E.  WETHERED  ON  THE  MICROSCOPIC 
[May  1893, 
with  streaks  and  spots  of  calcite  representing  those  tubules  which 
had  in  part  been  filled  in  with  the  mineral.  This  is  just  what  we  see 
in  the  spherule  represented  in  PL  YI.  fig.  6. 
The  oolitic  bodies  do  not  constitute  the  whole  of  the  limestone ;  there 
are,  in  addition,  fragments  of  polyzoa  and  of  shells,  joints  of  crinoids, 
valves  of  ostracoda,  and  aggregations  of  Girvanella  problematical 
The  Thin-bedded  Limestones  which  follow  the  Massive  Bed  at  the 
base  contain  the  remains  of  ostracoda,  portions  of  shell,  polyzoa, 
small  ossicles  of  crinoids,  and  numerous  aggregations  of  Girvanella. 
Sections  of  the  nodules  show  that  they  are  made  up  of  remarkably 
fine  detrital  material,  with  fragments  of  calcareous  organisms 
similar  to  those  noticed  in  the  beds  below,  ihese  nodules  are 
therefore  identical  with  those  at  May  Hill. 
IY.  Wenlock  Limestone  at  Ledbury. 
Let  us  now  proceed  to  examine  the  Wenlock  Limestone  at  Led¬ 
bury,  selecting  two  exposures  as  being  fairly  typical. 
The  first  of  these  is  a  quarry,  belonging  to  M.  Biddulph,  Esq., 
M.P.,  on  the  left-hand  side  of  the  road  leading  to  Eastnor.  The 
following  section  is  seen  in  the  quarry  : — 
*  Section  of  the  Wenlock  Limestone.  BiddulpKs 
Quarry ,  Ledbury. 
[Top  of  Quarry.]  Approximate 
thickness. 
6.  Argillaceous  Beds,  with  some  few  calcareous  ft.  in. 
nodules . ^  ^ 
5.  Nodular  Argillaceous  Limestone,  with  regular 
Nodules  in  Argillaceous  Bands . ••••  10  0 
4.  Argillaceous  Band  terminating  the  Massive 
Limestones  . ^ 
3.  Dark  Limestone . ~  0 
2.  Crystalline  Limestone  . 10  0 
1.  Slate-coloured,  Argillaceous  Nodular  Lime¬ 
stone  .  8  0 
[Base  of  Quarry.  Not  fully  exposed.] 
The  first  thing  which  strikes  one  on  reviewing  the  above  section 
is  the  difference  between  it  and  that  at  May  Hill  (see  p.  237). 
I  had  great  doubts  as  to  whether  the  beds  are  those  of  the  Wenlock 
Limestone  Series,  and  the  difficulty  is  increased  by  the  absence  of 
fossils.  The  beds  are  marked  as  Wenlock  Limestone  on  the  Geologi¬ 
cal  Survey  map,  and  the  correctness  of  the  mapping  is  confirmed  by 
Mr.  Geo.  H.  Piper,  F.G.S.,  of  Ledbury,  who  is  an  acknowledged 
authority  on  the  geology  of  the  district.  The  variable  nature,  of 
the  Wenlock  Limestone  was  also  noted  by  the  late  Prof.  Phillips, 
who  said:  “  It  has  been  already  observed  that  the  Wenlock  Lime¬ 
stone,  in  some  places  a  single  solid  bed,  covered  by  calcareous  nodules, 
is  accumulated  in  other  localities,  to  a  double  or  even  triple  series,  a  1 
more  or  less  suitable  for  the  lime-burner.”  1  He  also  stated  that 
1  Mem.  Geol.  Survey,  vol.  ii.  part  i.  (1848)  p.  81. 
