508 
MR.  S.  S.  BUCKMAN  ON  THE  BAJOCIAN  [Nov.  1 893, 
Frogdeu,  he  says  {op.  cit.  p.  48)  “  This  horizon  or  sub-stage  cannot 
be  very  far  from  that  of  Px  at  Burton  Bradstock.  However,  this 
must  be  lower  in  the  geological  scale,  though  not  much.”  As  his 
cadomensis- beds  were  deposited  during  my  niortensis  hemera,  the 
above  remarks  state  the  case  exactly.1 
(b)  Correlation  with  Dundry. — The  chief  interest  which  attaches 
to  correlation  with  Dundry  is  in  regard  to  what  has  been  hitherto 
considered  as  the  typical  ‘  Humphriesianum- zone’  of  that  locality, 
though  I  had  ventured  to  place  it  somewhat  lower,  namely,  the 
‘Ironshot.’  The  following  outline-section  will  explain  the  beds 
sufficiently  for  correlation  at  present. 
Section  XVIII. —  Outline  Section  of  the  top  of  Dundry  Hill. 
Feet.  Inches. 
1.  Coral-bed  and  Building-stone  . .about  25  0 
2.  The  ‘  Ironshot.’  Hard  brown  Ironshot 
Oolite  with  a  very  level  top.  The  horizon 
of  Sowerby’s  types  of  Ammonites  Sower- 
byi  and  corrugatus  3  (probable  horizon  of 
his  contractus  and  Braikenndgii ,  the 
latter  presumably  not  the  same  as  is 
called  ‘  Amm.  Brai/cenridgii  ’  generally  ; 
neither  of  these  two  types  to  be  found). 
‘  Stephanoceras  ’  Sauzei,  Sonninia  cf. 
propinquans,  Sonn.  cf.  mesacanfhus 
(Waag.),  Acanthothyris  paucispina, 
numerous  Bleurotomarice  .  1  6 
3.  ‘  White  Ironshot.’  White  stone  with  nume¬ 
rous  iron  grains,  which  decrease  in  size 
downwards,  giving  the  stone  a  still 
whiter  appearance.  Softer  than  the  bed 
above,  more  affected  by  the  weather. 
The  horizon  of  Sowerby’s  types  of 
Ammonites  Iceviusculus  and  A.  Browni. 
Contains  a  large  assortment  of  Witchellics, 
also  4  Sonninia  ’  Stephani,  Sonn.  cf.  Jissi- 
lobata,  numerous  Oppelice  . .  1  6 
4.  Limestone  and  marl.  Lioceras  concavum , 
Hyperliocerata,  Terehratida  Eudesi,  T. 
cortonensis  .  6  0 
It  is  easy  to  see  that  Beds  2,  3,  4  were  deposited  during  the 
hemerte  of  Sauzei- concavi  ;  in  fact,  that  they  were  contemporaneous 
with  Beds  6-13  of  Sandford  Lane.  To  be  more  precise,  Bed  2  of 
Dundry  was  contemporaneous  with  the  upper  four  inches  of  Bed  6  of 
Sandford  Lane,  and  Bed  3  with  the  rest  of  the  .Sandford  Lane 
4  Fossil  Bed/  It  is  noticeable  that  at  Dundry  the  thickness  of  strata 
in  the  Witchellice  and  Sauzei  hemerse  is  greater  than  at  Sandford 
1  It  is  necessary  to  explain  that,  as  a  designation  for  the  hemera  during 
which  the  4  cadomensis- beds  ’  were  deposited,  niortensis  has  been  chosen  instead 
of  cadomensis ,  to  avoid  any  risk  of  confusion  in  discriminating  between  various 
species  of  cadomensis- like  Ammonites,  which  occur  at  different  horizons. 
2  This  is  only  an  outline-section,  but  sufficient  for  the  present  purpose. 
Mr.  Edw.  Wilson,  F.G.S.,  and  myself  hope  to  make  a  more  detailed  investigation 
of  Dundry  shortly. 
3  I  speak  from  examination  of  the  matrix  of  the  type-specimens. 
Sauzei. 
Witchellice. 
Discitoe. 
Concavi. 
