Yol.  49. J  THE  BAJOCIAX  OE  THE  SHEEBOEXE  DISTEICT.  50* 
are  pointed  out  in  Table  I.  From  these  two  Tables  it  may  be  seen 
that  from  the  Murchisonce  to  Sauzei  hemerse  the  area  of  maximum 
deposit  was  apparently  shifting  from  west  to  east,  and  from  Garan- 
tianoe  to  fuscoe  it  was  shifting  from  east  to  west.  Apparently  the  line 
of  inclination  shown  for  the  strata  of  the  Truellii  hemera  is  against 
this  statement;  but  it  is  noticeable  that  the  line  begins  to  rise 
before  that  of  Garantiana.  I  suggest  that,  if  we  had  an  opening 
between  Halfway  House  and  Sherborne,  the  area  of  maximum 
deposit  would  be  found,  and  that  the  line  would  then  run  as  shown 
by  the  dots. 
It  should  be  noted  that  the  various  localities  have  been  placed  in 
order  according  to  their  position  at  right  angles  to  the  line,  as  in 
Table  I. ;  but  here  they  are  to  scale.  As  very  different  vertical  and 
horizontal  scales  have  been  used,  the  inclination  is  excessively 
exaggerated.  As  a  matter  of  fact,  in  the  steepest  of  the  inclinations 
shown,  the  rise  is  not  more  than  1  in  400. 
I  have  marked  the  most  fossiliferous  localities  by  means  of  circles. 
It  must  be  understood  that  these  are  not  the  only  localities  where 
fossils  occur,  but  the  best  localities.  It  will  be  noticed  that  there  is 
the  same  recession  eastward  up  to  Humphriesiani-niortensis ,  and 
later  a  progression  westward.  The  following  list  gives  the 
principal  strata  in  their  relative  descending  order,  and  it  will  show 
the  different  localities  and  horizons  of  the  c  fossil-beds.’ 
The  s  Ixfeeioe-Oolite  ?  Steata  oe  the  Sheeboexe  Disteict 
(generalized). 
The  top  beds,  the  limestones  of  Halfway  House. 
The  £  Fossil  Bed  ’  of  Halfway  House. 
The  ‘  Building-stone  ’  of  Sherborne. 
The  4  Road-stone  ’ — the  Ironshot  Oolite  of  Frogden.  The  4  Fossil  Beds.’ 
The  4  Fossil  Bed  ’  of  Sandford  Lane. 
The  4  Fossil  Bed  ’  of  Bradford  Abbas. 
The  4  Paving  Bed  ’  of  Bradford  Abbas. 
The  4  Dew  Bed  ’  of  Bradford  Abbas,  etc. 
CoEEELATIOX  OE  THE  STEATA. 
1.  Correlation  with  adjacent  Districts. 
(a)  Correlation  with  South  Dorset. — In  this  connexion  it  is  not 
my  intention  to  enter  into  any  particular  details.  I  hope  to  in¬ 
vestigate  the  beds  of  that  district  still  more  closely  than  I  have 
hitherto  done,  and  in  such  work  the  knowledge  obtained  from  the 
Sherborne  district  will  be  especially  valuable.  The  results  of  that 
future  work  I  hope  to  lay  before  the  Society.  At  present,  all 
that  I  need  say  about  the  South  Dorset  strata  as  compared  with 
those  of  Sherborne  is  this :  that  Hudleston’s  can  be  correlated 
with  great  exactness  with  the  6  Bttildixg-stoxe  ’  of  Sherborne,  plus 
part  of  the  overlying  ragstones.  It  comes  in,  in  fact,  exactly  where 
Hudleston  supposed  it  did,  so  that  my  researches  confirm  his  critical 
knowledge  of  the  deposits.  Speaking  of  the  cadomensis- beds  of 
1  4  British  Jurassic  Gasteropoda/  p.  31,  Palasont.  Soc.  1887. 
