﻿GRAVEL 
  BEDS 
  OP 
  ABERDEENSHIRE. 
  

  

  List 
  of 
  the 
  Shells. 
  

  

  155 
  

  

  1. 
  Astarte 
  mutabilis 
  , 
  

  

  2. 
  Artemis 
  lincta 
  , 
  

  

  3. 
  Cardium 
  edule 
  , 
  

  

  4. 
  Cyprina 
  islandica 
  

  

  5. 
  rustica 
  

  

  6. 
  Fusus 
  autiquus 
  (dextral 
  form)... 
  

  

  7. 
  , 
  var. 
  carinatus 
  (do.) 
  

  

  8. 
  , 
  var. 
  contrarius 
  .... 
  

  

  9. 
  Nassa 
  reticosa 
  

  

  10. 
  Nucula 
  Cobboldise 
  

  

  11. 
  Panopasa 
  Faujasii 
  ? 
  

  

  12. 
  Pecten 
  maximus 
  ? 
  

  

  13. 
  opercularis 
  

  

  14. 
  Pectimculus 
  glycymeris 
  (large 
  

  

  form) 
  , 
  

  

  15. 
  Pholas 
  crispata 
  

  

  16. 
  Purpura 
  lapillus, 
  var. 
  incrassata 
  

  

  17. 
  Tellina 
  balthica 
  , 
  

  

  18. 
  Trophon 
  costiferum 
  ? 
  , 
  

  

  1 
  9. 
  Turritella 
  incrassata 
  , 
  

  

  20. 
  Venus 
  casina 
  

  

  21. 
  Voluta 
  Lamberti 
  

  

  22. 
  Mactra 
  sp. 
  

  

  23. 
  Myasp. 
  

  

  24. 
  Glycymeris 
  sp. 
  

  

  25. 
  Pileopsis 
  sp. 
  

  

  ;per 
  cent. 
  

  

  •2 
  

  

  11 
  

  

  52 
  43 
  

  

  1 
  s 
  

  

  * 
  ! 
  * 
  

  

  * 
  ! 
  

  

  43 
  

  

  5 
  

   24 
  

  

  ? 
  Jap 
  in 
  

  

  ? 
  Mexico 
  

  

  12 
  

  

  57 
  

  

  ■3 
  s 
  

   °3 
  

  

  3 
  

  

  It 
  will 
  be 
  seen 
  that 
  the 
  group 
  is 
  most 
  nearly 
  related 
  to 
  the 
  

   Red 
  Crag, 
  all 
  the 
  species 
  being 
  found 
  there 
  save 
  one, 
  viz. 
  Tellina 
  

   balthica. 
  Messrs. 
  Searles 
  V. 
  Wood 
  maintain 
  that 
  this 
  shell 
  does 
  

   not 
  occur 
  in 
  the 
  Coralline, 
  Red, 
  Norwich, 
  or 
  Chillesford 
  Crag 
  beds 
  of 
  

   England, 
  although 
  it 
  is 
  found 
  at 
  Bridlington 
  and 
  in 
  all 
  the 
  later 
  

   glacial 
  deposits. 
  But 
  there 
  would 
  be 
  nothing 
  surprising 
  in 
  its 
  

   inhabiting 
  the 
  Aberdeenshire 
  coast 
  at 
  the 
  Crag-period, 
  although 
  

   absent 
  from 
  the 
  shores 
  of 
  Norfolk. 
  

  

  It 
  is, 
  however, 
  by 
  no 
  means 
  unlikely 
  that 
  the 
  deposits 
  from 
  which 
  

   the 
  Slains 
  shells 
  were 
  derived 
  may 
  have 
  included 
  different 
  members 
  

   of 
  the 
  Crag 
  series, 
  and 
  even 
  some 
  of 
  a 
  later 
  stage. 
  But 
  the 
  presence 
  

   of 
  Voluta 
  Lamberti, 
  Astarte 
  mutabilis, 
  Trophon 
  costiferum, 
  Nassa 
  

   reticosa, 
  Fusus 
  contrarius, 
  and 
  Oyprina 
  rustica, 
  together 
  with 
  the 
  

   prevalence 
  of 
  the 
  large 
  form 
  of 
  Pectunculus 
  glycymeris 
  and 
  of 
  Venus 
  

   casina, 
  affords 
  good 
  evidence 
  that 
  some 
  bed 
  as 
  old 
  at 
  least 
  as 
  the 
  

   Bed 
  Crag 
  of 
  Norfolk 
  must 
  have 
  contributed 
  to 
  the 
  remains. 
  

  

  