﻿1864.] 
  DAWKINS 
  RH^TIC 
  BEDS 
  AND 
  WHITE 
  LIAS. 
  

  

  Section 
  of 
  Rhcetic 
  Beds 
  to 
  the 
  West 
  of 
  Watchet. 
  

  

  399 
  

  

  No, 
  

  

  1. 
  

  

  2. 
  

  

  10. 
  

   11. 
  

  

  12. 
  

   13. 
  

  

  14. 
  

  

  15. 
  

  

  18. 
  

   19. 
  

  

  Thick- 
  

   ness. 
  

  

  Inches, 
  

   1 
  

  

  24 
  

  

  12 
  

  

  24 
  

   6 
  

  

  18 
  

  

  Description. 
  

  

  A 
  thin 
  film 
  of 
  conglomerate, 
  com 
  

   posed 
  of 
  the 
  pebbles 
  of 
  the 
  

   rock 
  below, 
  and 
  full 
  of 
  fossils 
  

  

  Greenish-grey 
  indurated 
  sandy 
  

   marl, 
  full 
  of 
  Avicula 
  contorta 
  

   passing 
  imperceptibly 
  into 
  the 
  

   bone-bed. 
  

  

  Hard, 
  compact, 
  grey 
  limestone 
  

  

  Black 
  shale, 
  containing 
  nodules. 
  

   Compact 
  grey 
  micaceous 
  sand- 
  

   stones. 
  

  

  Indurated 
  grey 
  marl. 
  

   Dark 
  micaceous 
  sandstone. 
  

  

  Dark 
  shale. 
  

  

  Limestone 
  full 
  of 
  Shells: 
  com 
  

   pact, 
  dark, 
  earthy, 
  micaceous 
  

   inferiorly. 
  

  

  Black 
  shale. 
  

  

  G-rey 
  limestone 
  full 
  of 
  Shells, 
  

   which 
  occur 
  in 
  nests, 
  very 
  hard, 
  

   and 
  traversed 
  with 
  cracks 
  filled 
  

   with 
  carbonate 
  of 
  lime. 
  

  

  Dark 
  shale 
  with 
  calcareous 
  no- 
  

   dules. 
  

  

  Earthy 
  and 
  sandy 
  limestone, 
  no- 
  

   dular, 
  irregular, 
  and 
  micaceous 
  

  

  Shale. 
  

  

  Hard, 
  ripple-marked 
  blue 
  lime- 
  

   stone, 
  full 
  of 
  cracks 
  filled 
  with 
  

   carbonate 
  of 
  lime, 
  divided 
  into 
  

   irregular 
  laminae 
  by 
  shale. 
  

  

  Dark 
  shale. 
  

  

  Hard, 
  irregularly 
  bedded 
  mica- 
  

   ceous 
  and 
  calcareous 
  sandstone, 
  

   pyritous, 
  ripple-marked. 
  

  

  Dark 
  shale. 
  

  

  Dark 
  shelly 
  limestone, 
  with 
  layers 
  

   of 
  fibrous 
  carbonate 
  of 
  lime. 
  

  

  Fossils. 
  

  

  Desmacanthus 
  cloacinus. 
  

  

  Saurichthys 
  apicalis. 
  

  

  Acrodus 
  minimus. 
  

  

  Acrodus 
  acutus. 
  

  

  Gyrolepis 
  Alberti. 
  

  

  Gyrolepis 
  tenuistriatus. 
  

  

  Avicula 
  contorta. 
  

  

  Cardinia 
  ? 
  

  

  Anatina 
  ? 
  

  

  Remains 
  the 
  same 
  as 
  No. 
  1, 
  with 
  

   the 
  exception 
  of 
  the 
  Desmacan- 
  

   thus 
  cloacinus 
  and 
  the 
  equivo- 
  

   cal 
  Cardinia. 
  

  

  Fragments 
  of 
  shells. 
  

  

  Acrodus 
  minimus. 
  

  

  Acrodus 
  acutus. 
  

  

  Axinus 
  cloacinus. 
  

   Axinus 
  elongatus. 
  

   Anatina 
  precursor. 
  

   Pleurophorus 
  elongatus. 
  

   Cardium 
  Rhceticum. 
  

   Chemnitzia 
  Henrici. 
  

  

  Acrodus 
  minimus. 
  

   Acrodus 
  acutus. 
  

   Gyrolepis 
  Alberti. 
  

   Gyrolepis 
  tenuistriatus. 
  

  

  Avicula 
  contorta. 
  

   Axinus 
  elongatus. 
  

   Pleurophorus 
  elongatus. 
  

  

  Composed 
  in 
  great 
  part 
  of 
  Avicula 
  

  

  contorta. 
  

   Axinus 
  cloacinus. 
  

   Cylindrites 
  elongatus. 
  

   Hybodus. 
  

  

  Pullastra 
  arenicola. 
  

   Axinus 
  cloacinus. 
  

  

  Hybodus. 
  

  

  Acrodus 
  minimus. 
  

  

  Acrodus 
  acutus. 
  

  

  Gyrolepis 
  Alberti. 
  

  

  Gyrolepis 
  tenuistriatus. 
  

  

  Avicula 
  contorta. 
  

  

  Hollow 
  Pteredactylian 
  bone. 
  

  

  2f2 
  

  

  