﻿A. 
  W. 
  EDGELL 
  ON 
  BTOLEIGH-SALTERT0N 
  LAMELLIBRANCHS. 
  47 
  

  

  Aviculopecten 
  Tromelini, 
  sp. 
  HOV. 
  PI. 
  V. 
  fig. 
  1. 
  

  

  This 
  is 
  the 
  exterior 
  of 
  a 
  shell 
  in 
  my 
  collection 
  ; 
  the 
  broken 
  ear 
  is 
  

   much 
  better 
  seen 
  on 
  the 
  other 
  half 
  of 
  the 
  pebble, 
  and 
  shows 
  the 
  

   shell 
  to 
  have 
  been 
  almost 
  if 
  not 
  quite 
  equilateral. 
  The 
  radiating 
  

   ribs 
  are 
  well 
  developed, 
  and 
  alternate 
  towards 
  the 
  centre 
  with 
  

   smaller 
  ones 
  ; 
  these 
  latter 
  are 
  indistinct 
  and 
  irregular 
  towards 
  the 
  

   sides. 
  Measurement 
  from 
  beak 
  to 
  ventral 
  margin 
  l^inch; 
  breadth 
  

   across 
  the 
  shell 
  1 
  in. 
  7 
  lines. 
  

  

  Pterinea, 
  sp. 
  ? 
  PI. 
  V. 
  figs. 
  2, 
  2a. 
  (Mr. 
  Vicary's 
  collection.) 
  

   (Compare 
  P. 
  lineahda.) 
  

  

  The 
  surface 
  of 
  this 
  is 
  not 
  well 
  enough 
  preserved 
  to 
  be 
  sure 
  of 
  it. 
  

   I 
  have 
  a 
  specimen 
  from 
  Gahard, 
  which 
  may 
  be 
  the 
  same. 
  M. 
  

   Lebesconte 
  recognizes 
  it. 
  

  

  Pterenea, 
  sp. 
  PI. 
  V. 
  fig. 
  3. 
  (Mr. 
  Vicary's 
  collection.) 
  

  

  This 
  is 
  a 
  very 
  globose 
  inflated 
  form, 
  with 
  an 
  acute 
  wing 
  on 
  the 
  anal 
  

   side 
  of 
  the 
  beak 
  and 
  concentric 
  lines 
  of 
  growth 
  ; 
  length 
  from 
  point 
  of 
  

   wing 
  to 
  beak 
  rather 
  more 
  than 
  6 
  lines. 
  Mr. 
  Vicary 
  has 
  other 
  larger 
  

   specimens. 
  

  

  Pterinea 
  retroflexa 
  (Hisinger). 
  PI. 
  V. 
  fig. 
  4. 
  (Mr. 
  Vicary's 
  

   collection.) 
  

  

  This 
  is 
  so 
  like 
  some 
  forms 
  of 
  this 
  very 
  variable 
  shell 
  that 
  I 
  can 
  

   give 
  it 
  no 
  other 
  name. 
  Length 
  from 
  buccal 
  to 
  anal 
  angle 
  1 
  in. 
  

   5 
  lines 
  ; 
  from 
  hinge-line 
  to 
  ventral 
  margin 
  8^ 
  lines. 
  It 
  is 
  recog- 
  

   nized 
  by 
  M. 
  Lebesconte. 
  

  

  Paljearca, 
  sp. 
  PI. 
  V. 
  figs. 
  5, 
  5a. 
  (Mr. 
  Vicary's 
  collection.) 
  

  

  Two 
  specimens 
  are 
  figured 
  which 
  differ 
  from 
  the 
  Palaarca 
  secunda 
  

   of 
  Mr. 
  Salter 
  ; 
  the 
  angle 
  made 
  by 
  the 
  anal 
  slope 
  with 
  the 
  hinge- 
  

   line 
  is 
  much 
  more 
  obtuse, 
  and 
  the 
  hinge-line 
  longer 
  in 
  proportion 
  to 
  

   the 
  shell 
  ; 
  the 
  teeth 
  also 
  appear 
  to 
  differ. 
  It 
  is 
  recognized 
  by 
  M. 
  

   Lebesconte. 
  

  

  Avicula, 
  sp. 
  PL 
  VI. 
  fig. 
  1. 
  (Mr. 
  Vicary's 
  collection.) 
  

  

  A 
  distinct 
  form, 
  but 
  very 
  imperfect. 
  

  

  Cleidophorus 
  ? 
  PI. 
  VI. 
  figs. 
  2, 
  2a. 
  

  

  M. 
  de 
  Tromelin 
  thinks 
  this 
  may 
  be 
  a 
  ChidopJiorus 
  ; 
  the 
  buccal 
  

   muscular 
  impression 
  is 
  doubtful. 
  It 
  is 
  in 
  my 
  collection. 
  

  

  Pterinea, 
  sp. 
  PI. 
  VI. 
  fig. 
  3. 
  (Mr. 
  Vicary's 
  collection.) 
  

  

  The 
  cast 
  of 
  an 
  exterior 
  from 
  Gahard 
  is 
  before 
  me 
  exactly 
  re- 
  

   sembling 
  this 
  in 
  outline 
  ; 
  M. 
  Lebesconte 
  recognizes 
  it. 
  M. 
  Bayan 
  

   thinks 
  it 
  may 
  be 
  Avicula 
  matutinalis, 
  D'Orb. 
  PI. 
  VI. 
  fig. 
  5 
  also 
  

   represents 
  a 
  specimen 
  of 
  this 
  species. 
  

  

  Lunulacarditjm 
  ventricostjm. 
  PI. 
  VI. 
  figs. 
  4, 
  4a. 
  (Mr. 
  Vicary's 
  

   collection.) 
  

   Very 
  like 
  M. 
  Barrande's 
  genus 
  Silurind 
  ; 
  the 
  beak 
  is 
  slightly 
  in- 
  

  

  