﻿398 
  

  

  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  [June 
  8 
  

  

  striatogranidata, 
  Gervillia 
  precursor, 
  Pullastra 
  arenicola, 
  and 
  Car- 
  

   dium 
  Eliceticum, 
  the 
  Univalves 
  by 
  a 
  cast 
  of 
  a 
  Chemnitzia 
  or 
  Turritella, 
  

  

  Fig. 
  1. 
  — 
  Section 
  ivest 
  of 
  Watchet. 
  

  

  water. 
  

  

  Keuper. 
  

  

  Lower 
  Rhsetic. 
  

  

  * 
  Mammalian 
  tooth. 
  

  

  f 
  Bone-bed. 
  

  

  the 
  Cephalopoda 
  by 
  the 
  fragmentary 
  pen 
  of 
  a 
  dibranchiate 
  octopod 
  

   closely 
  allied 
  to 
  the 
  Liassic 
  Beloteuthis 
  (Miinst.) 
  or 
  Geoteuthis 
  

   (Miinst.) 
  ; 
  of 
  the 
  Fishes, 
  the 
  Ganoids 
  by 
  Saurichthys 
  ajpicalis, 
  Gyro- 
  

   lepis 
  Alberti, 
  and 
  G. 
  tenuistriatus, 
  the 
  Sharks 
  by 
  Acrodus 
  minimus 
  ; 
  

   Sargodon 
  Tomicus 
  was 
  also 
  found. 
  Two 
  rolled 
  fragments 
  of 
  large 
  

   bones, 
  of 
  dense 
  texture, 
  indicate 
  the 
  presence 
  of 
  the 
  Reptilia 
  ; 
  while 
  

   one 
  crushed 
  and 
  hollow 
  bone, 
  in 
  fineness 
  of 
  texture, 
  polish 
  of 
  sur- 
  

   face, 
  and 
  thinness 
  of 
  walls, 
  reminds 
  me 
  of 
  the 
  Pterodactylian 
  wing- 
  

   bones 
  of 
  the 
  Stonesfield 
  slate. 
  And 
  lastly 
  — 
  to 
  pass 
  over 
  the 
  long 
  

   branching 
  casts, 
  probably 
  of 
  Fucoids, 
  and 
  the 
  fragments 
  of 
  fossil 
  

   wood 
  — 
  the 
  Mammalia 
  are 
  represented 
  by 
  a 
  small 
  animal 
  closely 
  

   allied 
  to 
  the 
  Kangaroo-rat, 
  which 
  I 
  purpose 
  to 
  describe 
  in 
  Part 
  II. 
  

   of 
  this 
  paper 
  under 
  the 
  name 
  of 
  Hypsiprymnopsis 
  Rhceticus. 
  These 
  

   beds 
  are 
  overlain 
  by 
  2 
  feet 
  of 
  soft 
  grey 
  shaly 
  (G) 
  marlstone, 
  without 
  

   fossils. 
  Above 
  this 
  again 
  are 
  6 
  feet 
  of 
  a 
  greenish-grey 
  sandy 
  fissile 
  

   marlstone 
  (H), 
  containing 
  numerous 
  casts 
  of 
  Fucoids 
  and 
  trails 
  

   of 
  Annelids, 
  with 
  Pullastra 
  arenicola, 
  Acrodus 
  minimus, 
  Gyrolepis 
  

   tenuistriatus, 
  and 
  G. 
  Alberti. 
  In 
  this, 
  as 
  in 
  the 
  fossiiiferous 
  bed 
  

   below, 
  the 
  ripple-marks 
  indicate 
  a 
  littoral 
  condition 
  of 
  deposit; 
  

   and 
  the 
  surfaces 
  of 
  the 
  beds 
  into 
  which 
  the 
  stone 
  splits 
  are 
  tra- 
  

   versed 
  by 
  irregular 
  cracks 
  from 
  exposure 
  (as 
  it 
  seems 
  to 
  me) 
  to 
  

   the 
  heat 
  of 
  the 
  sun. 
  These 
  were 
  in 
  many 
  cases 
  filled 
  up 
  with 
  

   organic 
  remains. 
  Upon 
  the 
  water-worn 
  upper 
  surface 
  are 
  superim- 
  

   posed 
  the 
  limestones, 
  sandstones, 
  and 
  shales 
  of 
  the 
  Avicula 
  contorta 
  

   series, 
  of 
  which 
  the 
  following 
  is 
  a 
  detailed 
  section. 
  

  

  