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MR.  S.  S.  BUCKMAN  ON  THE  BAJOCIAN  [NOV.  1 893, 
Summary. 
The  following  is  a  summary  of  the  facts  and  conclusions  advanced 
in  this  paper  : — 
I.  The  term  4  hemera  ’  is  proposed  as  a  chronological  subdivision 
of  an  ‘  age/ 
II.  The  strata  referred  to  in  the  paper  are  considered  to  have 
been  deposited  during  at  least  12  hemerae. 
III.  The  4  Building-stone  ’  of  Sherborne  was  deposited  before  the 
4  Fossil  Bed  ’  of  Halfway  House,  and  is  not  contemporaneous 
with  the  4  top  beds  ’ — 4  limestone-beds  ’ — of  that  place. 
I V.  That  the  lower  part  of  the  4  Fossil  Bed  ’  at  Sandford  Lane  con¬ 
tains  the  same  species  as  Bed  4  of  Waagen’s  Sowerbyl-'/,onQ 
at  Gingen  (Wiirttemberg). 
Y.  That  there  is  the  same  faunal  succession  in  Dorsetshire, 
in  Somersetshire,  in  Gloucestershire,  in  Normandy,  in 
Southern  France,  and  in  Wiirttemberg. 
YI.  That  the  upper  and  lower  parts  of  the  Sandford  Lane  4  Fossil 
Bed  ’  were  contemporaneous  with  the  4  Ironshot  ’  and  4  White 
Iron  shot  ’  of  Dun  dry  respectively. 
YI.  That  the  low'er  part  of  the  Sandford  Lane  4  Fossil  Bed  ’  was 
deposited  contemporaneously  with  the  Gryphaea- grit  of 
Leekhampton. 
YITI.  That  the  strata  of  the  Lower  Triyonia-s; rit  of  the  Cottes- 
wolds  were  deposited  during  the  cliscitce  hemera. 
IX.  That  in  the  district  reviewed  the  area  of  maximum  accumu¬ 
lation  of  deposit  moved  eastward  from  the  hemera  of  Mur- 
chisonce  till  that  of  Sauzei ,  and  westward  from  that  of 
Garantianci  till  that  of  fusca ;  that  the  mollusca  similarly 
shifted  their  headquarters  from  west  to  east  and  from  east 
to  west,  but  that  they  remain  always  westward  of  the  large 
accumulations  of  sediment. 
X.  That  there  was  a  westerly  overstep  of  the  deposit-area  in 
the  hemera  of  Murchisonce,  and  then,  with  a  little  exception 
during  the  hemera  of  Sauzei ,  a  recession  eastward  until 
niortensis.  Then  followed  an  immense  overstep. 
XI.  That  species  which  are  found  practically  together  are  not 
thereby  proved  to  have  been  contemporaneous. 
Postscript. 
[To  prevent  any  misconception,  I  may  perhaps  be  allowed  to  add 
the  following  remarks  : — 
A.  That  the  work  which  this  paper  represents  has  confirmed  my 
opinion  concerning  the  Toarcian. 
B.  That  the  words  4  subjacent  strata  ’  were  introduced  into  the  title 
of  the  paper  expressly  because  the  earlier  hemerae  were  con¬ 
sidered  to  be  Toarcian. 
