﻿324 
  

  

  ON 
  VALVATA 
  WOODWARDI, 
  N.SP., 
  AND 
  SPH^RIUM 
  BULLENI, 
  

   N.SP., 
  FROM 
  THE 
  CROMERIAN 
  (FOREST 
  BED) 
  OF 
  WEST 
  

   RUNTON, 
  NORFOLK. 
  

  

  By 
  A. 
  S. 
  Kennaed, 
  F.G.S. 
  

   Bead 
  10th 
  March, 
  1911. 
  

   DoKiNG 
  the 
  past 
  few 
  years 
  a 
  large 
  quantity 
  of 
  material 
  from 
  the 
  

   Cromerian 
  (Forest 
  Bed) 
  of 
  West 
  Runton, 
  Norfolk, 
  has 
  been 
  placed 
  

   at 
  my 
  disposal 
  by 
  M. 
  A. 
  C. 
  Hinton, 
  and 
  1 
  myself 
  have 
  also 
  collected 
  

   from 
  the 
  same 
  deposit. 
  A 
  close 
  study 
  of 
  this 
  has 
  revealed 
  the 
  necessity 
  

   for 
  a 
  revision 
  of 
  the 
  published 
  lists 
  of 
  species, 
  and 
  considerable 
  progress 
  

   has 
  been 
  made. 
  Since, 
  however, 
  it 
  is 
  unlikely 
  that 
  this 
  will 
  be 
  

   finished 
  for 
  some 
  little 
  time 
  I 
  have 
  considered 
  it 
  advisable 
  to 
  publish 
  

   descriptions 
  of 
  these 
  two 
  new 
  species, 
  since 
  it 
  is 
  necessary 
  to 
  quote 
  

   them. 
  The 
  molluscan 
  remains 
  have 
  been 
  obtained 
  from 
  two 
  distinct 
  

   layers 
  just 
  east 
  of 
  West 
  Runton 
  Gap. 
  The 
  uppermost 
  bed 
  is 
  a 
  sandy 
  

   gravel 
  full 
  of 
  shells. 
  It 
  is 
  about 
  8 
  inches 
  thick 
  and 
  about 
  5 
  feet 
  

   above 
  the 
  level 
  of 
  the 
  beach. 
  There 
  can 
  be 
  no 
  doubt 
  that 
  this 
  is 
  the 
  

   bed 
  described 
  by 
  Mr. 
  Clement 
  Reid 
  ^ 
  as 
  — 
  " 
  Near 
  West 
  Runton 
  Gap 
  the 
  

   bed 
  is 
  a 
  loamy 
  sand 
  full 
  of 
  Corhicula 
  fliiminalis 
  and 
  Paludina 
  gibba^ 
  

   As 
  a 
  matter 
  of 
  fact 
  Corbicula 
  fluminalis 
  does 
  not 
  occur, 
  the 
  shell 
  which 
  

   has 
  been 
  mistaken 
  for 
  it 
  being 
  Sphc^rmm 
  rwicola, 
  Leach. 
  The 
  other 
  

   bed 
  is 
  one 
  apparently 
  older, 
  and 
  is 
  a 
  silty 
  peat 
  occurring 
  on 
  the 
  

   foreshore, 
  more 
  to 
  the 
  eastward. 
  Mr. 
  Hinton 
  informs 
  me 
  that, 
  

   judging 
  from 
  the 
  fossil 
  Rodentia, 
  there 
  is 
  considerable 
  difference 
  in 
  

   age 
  between 
  the 
  two, 
  the 
  palseontological 
  evidence 
  supporting 
  the 
  

   stratigrapliical. 
  Both 
  the 
  new 
  species 
  were 
  verj^ 
  common 
  in 
  the 
  upper 
  

   bed, 
  though 
  not 
  so 
  abundant 
  in 
  the 
  lower. 
  

  

  Valvata 
  Woodwaedi, 
  n.sp. 
  

   Shell 
  conical, 
  solid, 
  rather 
  glossy, 
  closely 
  and 
  finely 
  striate 
  in 
  the 
  

   lines 
  of 
  growth 
  ; 
  whorls 
  4|-5, 
  convex 
  ; 
  body- 
  whorl 
  verj- 
  large 
  ; 
  apex 
  

   somewhat 
  sharply 
  pointed 
  ; 
  suture 
  oblique, 
  shallow 
  ; 
  mouth 
  oval, 
  

  

  angulated 
  above 
  ; 
  umbilical 
  chink 
  narrow 
  ; 
  operculum 
  unknown. 
  

   Height 
  9, 
  breadth 
  7 
  mm. 
  

  

  Locality/ 
  and 
  Formation. 
  — 
  West 
  Runton, 
  Norfolk 
  : 
  Cromerian 
  

   (Forest 
  Bed). 
  

  

  ^ 
  Pliocene 
  Deposits 
  of 
  Britain 
  (Mem. 
  Geol. 
  Survey), 
  1890, 
  p. 
  156. 
  

  

  