Vol.  49.]  ANNIVERSARY  ADDRESS  OF  THE  PRESIDENT.  IOI 
heretofore  known  as  the  Upper  Bagshot  Sands  of  the  Hampshire  Basin. 
The  Surrey  Upper  Bagshots  they  consider  to  be  such  as  might  have 
been  accumulated  in  a  bay  of  the  open  sea,  while  in  Hampshire 
the  Barton  Series  was  evidently  laid  down  within  the  influence  of  a 
considerable  river. 
Accepting  as  the  dividing-line  between  the  Middle  and  Upper 
Bagshots  of  Surrey  the  bed  of  pebbles  which  is  stated  to  occur  per¬ 
sistently  over  the  London  Basin,  the  greatest  proved  thickness  of 
the  Upper  Bagshots  is  about  230  feet.  The  various  levels  at  which 
the  pebble-bed  is  found  are  considered  to  show  that  the  formation 
rests  on  a  syncline  of  Bracklesham  Beds,  and  is  probably  conform¬ 
able  with  them.  There  seems  to  have  been  just  a  suspicion  in  the 
minds  of  the  Authors,  or  of  one  of  them,  as  to  whether  the  Upper 
Bagshots  of  the  London  Basin  are  not  partly  or  even  mainly  of 
Upper  Bracklesham  age ;  but  if  they  are  to  be  regarded  as  Barton 
at  all,  there  can  be  no  doubt  whatever  as  to  their  being  Lower 
Barton.  Subsequently  the  Authors  appear  to  conclude  that  it  would 
be  unreasonable  to  put  the  whole  of  the  230  feet  of  Upper  Bagshot 
Sand  into  the  Bracklesham  Series. 
The  fossils  on  which  these  correlations  are  based  were  mainly 
obtained  about  the  middle  of  the  Uox  Hills,  on  the  Woking- Aldershot 
line,  by  Messrs.  Monckton  and  Herries.  The  Authors  indeed  consider 
it  certain  that  the  Upper  Bagshots  of  the  London  area  were  once  at 
least  as  fossiliferous  as  their  equivalents  in  Hampshire,  and  the 
remarkable  condition  of  some  of  the  Hampshire  beds  when  not 
protected  by  clays  gives  some  colour  to  this  supposition.  The  list 
contains  52  species  of  Mollusca,  of  which  43  could  be  determined 
specifically.  Thirty-one  are  common  to  the  Upper  Bracklesham 
and  the  Barton,  and  there  are  nine  Barton  species  unknown  in  the 
Bracklesham.  Making  allowance  for  the  effects  of  more  sandy 
conditions,  the  palaeontological  evidence  agrees  with  the  stratigraphy, 
the  presence  of  the  few  Bracklesham  forms  leading  the  Authors  to 
place  the  Tunnel-Hill  horizon  of  the  Woking- Aldershot  line  a  little 
below  that  of  Highcliff  in  Christchurch  Bay. 
Should  exact  correlation  betwixt  beds  of  the  London  and  Hamp¬ 
shire  Basins  be  ultimately  possible,  it  would  seem  almost  unnecessary 
to  perpetuate  a  double  nomenclature.  It  might,  indeed,  simplify 
the  problem  if  we  abolished  the  so-called  Middle  and  Upper  Bagshots, 
and  replaced  these  names  by  those  of  the  richly  fossiliferous  Hamp¬ 
shire  equivalents.  There  would  still  remain  the  variable  and  extensive 
underlying  series  of  clays  and  sands,  for  the  most  part  devoid  of 
