﻿98 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  series. 
  The 
  Lamellibranchiata, 
  in 
  both 
  groups, 
  differ 
  little 
  from 
  the 
  

   southern 
  facies, 
  the 
  large 
  fauna 
  in 
  the 
  Stamford 
  area 
  uniting 
  many 
  

   of 
  the 
  species. 
  Compared 
  also 
  with 
  Gloucestershire 
  and 
  Dorset- 
  

   shire, 
  the 
  Brachiopoda 
  are 
  not 
  abundant, 
  and 
  the 
  same 
  species 
  pre- 
  

   vail 
  everywhere. 
  Only 
  one 
  Bryozoon 
  is 
  named 
  in 
  the 
  collection 
  

   made, 
  and 
  this 
  (Cricopora 
  or 
  Spiropora 
  straminea) 
  is 
  the 
  well-known 
  

   form 
  occurring 
  in 
  the 
  Millepore-beds 
  of 
  Yorkshire. 
  The 
  Echinoidea, 
  

   species 
  for 
  species, 
  are 
  the 
  same 
  as 
  those 
  occurring 
  all 
  through 
  the 
  

   Cotteswolds 
  ; 
  they 
  equally 
  help 
  us 
  to 
  fix 
  the 
  age 
  of 
  the 
  Cave 
  beds 
  

   north 
  of 
  the 
  Humber, 
  determining 
  them 
  to 
  be 
  but 
  an 
  extension 
  of 
  

   the 
  Lincolnshire 
  Oolite 
  across 
  the 
  Humber. 
  The 
  Coralline 
  group 
  of 
  

   •Judd 
  seems 
  best 
  developed 
  in 
  the 
  Stamford 
  area, 
  south 
  of 
  the 
  ISTene, 
  

   and 
  in 
  the 
  Barnack 
  rag. 
  Taking 
  the 
  localities 
  in 
  the 
  order 
  of 
  their 
  

   productiveness 
  and 
  according 
  to 
  the 
  collections 
  made, 
  they 
  may 
  be 
  

   represented 
  in 
  the 
  following 
  list 
  : 
  — 
  

  

  Stamford 
  45 
  genera 
  and 
  88 
  species. 
  

  

  Marly 
  series, 
  Squire's 
  quarry 
  37 
  „ 
  59 
  „ 
  

  

  Colly 
  weston 
  beds 
  27 
  ,, 
  54 
  ,, 
  

  

  Stibbington 
  32 
  „ 
  50 
  „ 
  

  

  King's 
  Cliff 
  27 
  „ 
  48 
  „ 
  

  

  Wakerley 
  23 
  „ 
  42 
  „ 
  

  

  Wild's 
  Ford 
  13 
  „ 
  32 
  „ 
  

  

  "Weldon 
  15 
  „ 
  22 
  „ 
  

  

  Wittering 
  10 
  „ 
  18 
  „ 
  

  

  229 
  413 
  

  

  These 
  numbers 
  give 
  a 
  mean 
  of 
  distribution 
  for 
  the 
  genera 
  of 
  25, 
  

   and 
  for 
  the 
  species 
  of 
  46. 
  So 
  much 
  care 
  was 
  bestowed 
  upon 
  the 
  

   collecting, 
  through 
  the 
  agency 
  of 
  Mr. 
  Judd, 
  that 
  we 
  may 
  accept 
  the 
  

   faunal 
  value 
  of 
  the 
  species 
  in 
  each 
  locality 
  as 
  being 
  practically 
  

   exhaustive. 
  In 
  the 
  appendix 
  to 
  Prof. 
  Judd's 
  memoir, 
  compiled 
  by 
  

   myself, 
  will 
  be 
  found 
  on 
  pp. 
  276-283 
  a 
  detailed 
  specific 
  list 
  of 
  every 
  

   species 
  then 
  known 
  as 
  occurring 
  in 
  that 
  area 
  in 
  the 
  Lincolnshire 
  

   Oolite, 
  Collyweston 
  Slate, 
  and 
  Northampton 
  Sand. 
  The 
  faunas 
  of 
  

   these 
  3 
  groups 
  or 
  horizons 
  were 
  compared 
  amongst 
  themselves, 
  

   then 
  with 
  the 
  Inferior 
  Oolite 
  in 
  the 
  south 
  of 
  England 
  and 
  York- 
  

   shire, 
  and 
  then 
  with 
  the 
  Great 
  Oolite 
  of 
  the 
  west 
  of 
  England. 
  The 
  

   result 
  of 
  this 
  analysis 
  is 
  an 
  important 
  one, 
  and 
  clearly 
  shows 
  that 
  

   the 
  Lincolnshire 
  beds 
  are 
  far 
  more 
  nearly 
  allied 
  to 
  those 
  of 
  the 
  

   south 
  of 
  England 
  than 
  to 
  the 
  Yorkshire 
  Oolites. 
  It 
  is 
  expressed 
  in 
  

   figures 
  in 
  the 
  following 
  Table 
  (XL). 
  The 
  Midland 
  or 
  Northampton 
  

   and 
  Lincolnshire 
  Inferior 
  Oolite, 
  in 
  its 
  3 
  divisions, 
  occupies 
  the 
  first 
  

   3 
  columns 
  : 
  those 
  to 
  the 
  right 
  hand 
  are 
  compared 
  or 
  correlated 
  with 
  

   the 
  Midland 
  group. 
  

  

  