﻿61 
  

  

  NOTE 
  ON 
  PHOLAS 
  COSTULATA, 
  GOODALL. 
  

   By 
  the 
  lliglit 
  Hon. 
  Lord 
  Walsingham, 
  M.A., 
  LL.D., 
  F.ll.S., 
  etc. 
  

   Bead 
  10th 
  March, 
  1916. 
  

   In 
  1890 
  I 
  communicated 
  to 
  tlie 
  Norfolk 
  and 
  Xorwicli 
  Naturalists' 
  

   Sofdety 
  some 
  remarks 
  on 
  a 
  species 
  of 
  Pholas 
  dredged 
  by 
  my 
  father 
  off 
  

   Hill 
  Head, 
  near 
  Gosport, 
  about 
  1819, 
  and 
  these 
  were 
  published 
  in 
  

   the 
  fiftli 
  volume 
  of 
  the 
  Society's 
  Transactions 
  (pt. 
  1, 
  pp. 
  79-86, 
  witli 
  

   figures) 
  accompanied 
  by 
  two 
  interesting 
  letters 
  from 
  Dr. 
  J. 
  Goodall 
  

   (then 
  Provost 
  of 
  Eton 
  College), 
  to 
  whom 
  the 
  specimens 
  liad 
  been 
  

   sent, 
  and 
  who 
  suggested 
  {loc. 
  cit., 
  p. 
  80) 
  the 
  name 
  Pholas 
  codulata, 
  since 
  

   lie 
  considered 
  it 
  a 
  distinct 
  species 
  allied 
  to 
  P. 
  Candida. 
  In 
  the 
  same 
  

   communication 
  is 
  included 
  a 
  letter 
  from 
  Mr. 
  Edgar 
  A. 
  Smith, 
  I.S.O. 
  

   (then 
  in 
  charge 
  of 
  the 
  Conchological 
  Collections 
  at 
  the 
  Eritish 
  

   Museum, 
  Natural 
  History), 
  to 
  whom 
  I 
  sent 
  the 
  original 
  specimens, 
  

   and 
  who 
  expressed 
  tlie 
  opinion 
  that 
  they 
  represented 
  a 
  depauperated 
  

   form 
  of 
  P. 
  Candida. 
  

  

  Pholas 
  costulata, 
  Goodall. 
  — 
  Original 
  woodcut, 
  from 
  the 
  Trans. 
  Norf. 
  and 
  

   Norwich 
  Nat. 
  Soc, 
  vol. 
  v, 
  pt. 
  1, 
  1890, 
  p. 
  85; 
  taken 
  from 
  Mr. 
  Smith's 
  

   drawings. 
  Figs. 
  1 
  and 
  2, 
  two 
  sketches 
  showing 
  sculpture 
  and 
  variation 
  

   in 
  form 
  (enlarged). 
  Fig. 
  3, 
  dorsal 
  view 
  (natural 
  size), 
  accessory 
  plate 
  

   removed. 
  Fig. 
  4, 
  interior, 
  showing 
  hinge 
  characters, 
  etc. 
  

  

  On 
  December 
  '28th 
  last 
  I 
  found 
  on 
  the 
  beach 
  at 
  Hove, 
  Sussex, 
  

   a 
  small 
  block 
  of 
  chalk, 
  evidently 
  bored 
  by 
  Pholas, 
  and 
  cut 
  from 
  it 
  

   three 
  specimens, 
  two 
  small 
  and 
  one 
  larger 
  (of 
  which 
  one 
  valve 
  was 
  

   unfortunatelj' 
  broken). 
  I 
  at 
  once 
  recognized 
  these 
  as 
  similar 
  to 
  the 
  

   species 
  in 
  my 
  grandmother's 
  collection. 
  I 
  searched 
  for 
  several 
  days 
  

   on 
  the 
  same 
  beach 
  and 
  found 
  many 
  blocks 
  of 
  chalk 
  and 
  shale, 
  con- 
  

   taining 
  numerous 
  specimens 
  of 
  P. 
  parva 
  and 
  some 
  other 
  shells, 
  but 
  

   P. 
  Candida 
  was 
  not 
  represented, 
  nor 
  could 
  I 
  find 
  any 
  further 
  

   specimens 
  of 
  P. 
  cosUdata. 
  

  

  