Mr.  H.  Hicks  on  some  "  Menevian"  Fossils.  237 
Seeley,  Streptospondylus,  Owen,  and  Cetiosaurus,  Owen,  taking  the 
last  to  be  typified  by  the  large  species  in  the  Oxford  Museum.  He 
remarked  that  if  this  be  the  type  of  Cetiosaurus,  C.  brevls,  Owen,  can 
hardly  belong  to  it,  as  the  trunk- vertebrae  are  described  as  being  of 
a  totally  different  structure. 
December  6,  1871. — Joseph  Prestwich,  Esq.,  President,  in  the  Chair. 
The  following  communications  were  read : — 
1.  "  On  the  presence  of  a  raised  beach  on  Portsdown  Hill,  near 
Portsmouth,  and  on  the  occurrence  of  a  Flint  Implement  at  Down- 
ton."     By  Joseph  Prestwich,  Esq.,  F.R.S.,  President. 
The  author  noticed  a  section  observed  by  him  in  a  pit  ten  miles 
westward  of  Bourne  Common  and  five  miles  inland  in  a  lane  on 
the  north  side  of  East  Cams  Wood.  It  is  situated  at  an  eleva- 
tion of  300  feet  above  the  sea-level,  and  shows  some  laminated 
sands  with  seams  of  shingle,  overlying  coarse  flint-shingle  with  a 
few  whole  flints,  which  the  author  regarded  as  a  westward  continua- 
tion of  the  old  sea-beach  which  has  been  traced  from  Brighton,  past 
Chichester,  to  Bourne  Common.  A  flint  flake  was  found  by  the 
author  at  the  bottom  of  the  superficial  soil  in  this  pit.  The  author 
also  noticed  the  occurrence  of  a  flint  implement  of  the  type  of  those 
of  St.  Acheul  in  a  gravel  near  Downton  in  Hampshire.  This  gravel 
capped  a  small  chalk-pit ;  and  its  elevation  above  the  river  Avon  was 
about  150  feet.  Two  gravel-terraces  occur  between  this  pit  and  the 
river, — one  40-60,  the  other  80-110  feet  above  the  level  of  the  latter. 
2.  "  On  some  undescribed  Fossils  from  the  '  Menevian  Group  of 
Wales.'  "     By  Henry  Hicks,  Esq.,  F.G.S. 
In  this  communication  the  author  gave  descriptions  of  all  the 
fossils  hitherto  undescribed  from  the  Menevian  rocks  of  Wales.  The 
additions  made  to  the  fauna  of  the  Lower  Cambrian  rocks  (Long- 
mynd  and  Menevian  groups)  by  the  author's  researches  in  Wales 
during  the  last  few  years  now  number  about  fifty  species,  belonging 
to  twenty- two  genera,  as  follows : — 
Trilobites,  10  genera  and  30  species. 
Bivalved  and  other  Crustaceans,  3  genera  and  4  species. 
Brachiopods,  4  genera  and  6  species. 
Pteropods,  3  genera  and  6  species. 
Sponges,  1  genus  and  4  species. 
Cystideans,  1  genus  and  1  species. 
By  adding  to  these  the  Annelids,  which  are  plentiful  also  in  these 
rocks,  we  get  seven  great  groups  represented  in  this  fauna,  the 
earliest  known  at  present  in  this  country.  By  referring  to  the 
Tables  published  in  M.  Barrande's  excellent  new  work  on  Trilobites, 
it  will  be  seen  that  this  country  also  has  produced  a  greater  variety, 
or,  rather,  representatives  of  a  greater  number  of  groups  from  these 
early  rocks  than  any  other  country.  The  species  described  included 
Agnostus,  5  species ;  Arionellus,  1  species ;  Erinnys,  1  species ; 
Holocephalina,  1  species;  Conocoryphe,  2  species;  Anopolenus,  2 
species;  Cyrtotheca,  1  species;  Stenotheca,  1  species;  Theca,  2 
species ;  Protocystltes,  1  species,  &c.  The  author  also  entered  into 
a  consideration  of  the  range  of  the  genera  and  species  in  these 
