﻿48 
  A. 
  W. 
  EDGELL 
  OK 
  BUDLE1GH-SALTERTON 
  LAMELLIBRANCHS. 
  

  

  clined 
  to 
  the 
  left 
  ; 
  it 
  has 
  radiating 
  ribs 
  ; 
  from 
  beak 
  to 
  ventral 
  

   margin 
  1 
  in. 
  2>\ 
  lines 
  ; 
  thickness 
  of 
  the 
  valve 
  shown 
  4 
  lines. 
  Named 
  

   by 
  Mr. 
  Etheridge. 
  

  

  Ctenodonta, 
  sp. 
  PL 
  VI. 
  figs. 
  6, 
  6a, 
  66, 
  6c. 
  (Mr. 
  Vicary's 
  collec- 
  

   tion.) 
  

  

  Very 
  inflated 
  ; 
  the 
  incurved 
  beaks 
  are 
  nearly 
  a 
  line 
  apart, 
  hinge- 
  

   line 
  short, 
  with 
  four 
  teeth 
  visible 
  in 
  each 
  valve, 
  muscular 
  scars 
  on 
  

   both 
  sides 
  of 
  the 
  beak 
  strongly 
  defined, 
  pallial 
  impression 
  visible 
  on 
  

   the 
  buccal 
  half. 
  Recognized 
  by 
  M. 
  Lebeseonte. 
  From 
  beak 
  to 
  

   ventral 
  margin 
  nearly 
  9 
  lines 
  ; 
  length 
  1 
  in. 
  4| 
  lines 
  ; 
  thickness 
  of 
  

   both 
  valves 
  nearly 
  8 
  lines. 
  

  

  Oethonota 
  ? 
  PI. 
  VI. 
  fig. 
  7. 
  (Mr. 
  Vicary's 
  collection.) 
  

  

  The 
  grain 
  of 
  the 
  matrix 
  is 
  too 
  rough 
  to 
  make 
  much 
  of 
  this 
  ; 
  it 
  is 
  

   very 
  like 
  some 
  specimens 
  in 
  Jermyn 
  Street 
  from 
  the 
  Upper 
  Silurian 
  

   beds. 
  M. 
  de 
  Tromelin 
  recognizes 
  it. 
  

  

  EXPLANATION 
  OF 
  PLATES 
  IV.-VI. 
  

  

  Shells 
  from 
  the 
  Buolleigh-Salterton 
  pebbles, 
  natural 
  size. 
  

  

  Plate 
  IV. 
  

  

  Figs. 
  1, 
  la. 
  Modiopsis 
  armorici 
  (Salter). 
  

  

  2, 
  2a. 
  Modiolopsis 
  Lebesconti, 
  sp. 
  nov. 
  

  

  3, 
  3a. 
  Sanguinolites 
  ? 
  (contortus, 
  Salter?). 
  

  

  Plate 
  V. 
  

  

  Fig. 
  1. 
  Ayiculopecten 
  Tromelini, 
  sp. 
  nov. 
  

  

  2. 
  Pterinea, 
  sp. 
  (lineatula?) 
  ; 
  2a. 
  portion 
  of 
  surface 
  enlarged. 
  

  

  3. 
  Pterinea, 
  sp. 
  

  

  4. 
  Pterinea 
  retrofiexa 
  (Hisinger). 
  

  

  5. 
  5a. 
  Palsearca, 
  sp. 
  

  

  6. 
  6a. 
  Modiolopsis 
  armorici, 
  internal 
  cast 
  (?). 
  

  

  Plate 
  VI. 
  

  

  Fig. 
  1. 
  Avicula, 
  sp. 
  

  

  2, 
  2a. 
  Cleidophorus? 
  

  

  3. 
  Pterinea, 
  sp. 
  

  

  4, 
  4a. 
  Lunulacardium 
  Tentricosum. 
  

  

  5. 
  Pterinea, 
  sp. 
  

  

  6, 
  6a, 
  6b, 
  6c. 
  Ctenodonta, 
  sp. 
  

  

  7. 
  Orthonota? 
  

  

  Discussion. 
  

  

  Prof. 
  Pamsay 
  commented 
  on 
  the 
  value 
  of 
  the 
  paper. 
  The 
  dis- 
  

   tance 
  of 
  the 
  parent 
  rocks, 
  the 
  rolling 
  of 
  the 
  pebbles, 
  and 
  their 
  travel- 
  

   ling 
  from 
  south 
  to 
  north, 
  threw 
  considerable 
  light 
  on 
  the 
  physical 
  

   condition 
  of 
  the 
  Triassic 
  period. 
  If 
  the 
  New 
  Ped 
  Sandstone 
  were, 
  

   as 
  was 
  now 
  generally 
  supposed, 
  of 
  lake 
  origin, 
  the 
  information 
  given 
  

   was 
  of 
  still 
  higher 
  interest. 
  

  

  