﻿140 
  

  

  A 
  REVISION 
  OF 
  THE 
  TURRID^ 
  (PLEUEOTOMID^) 
  OCCUREING 
  IN 
  

   THE 
  PERSIAN 
  GULF, 
  GULF 
  OF 
  OMAN, 
  AND 
  NORTH 
  ARABIAN 
  

   SEA, 
  AS 
  EVIDENCED 
  MOSTLY 
  THROUGH 
  THE 
  RESULTS 
  OF 
  

   DREDGINGS 
  CARRIED 
  OUT 
  BY 
  MR. 
  F. 
  W. 
  TOWNSEND, 
  1893-1914. 
  

  

  By 
  Jamks 
  Cosmo 
  Melvill, 
  M.A., 
  D.Sc, 
  F.L.S., 
  etc. 
  

  

  Bead 
  8th 
  December, 
  1916. 
  

  

  PLATES 
  VIII-X. 
  

  

  The 
  comprehensive 
  study 
  of 
  the 
  maiine 
  molluscan 
  fauna 
  of 
  the 
  

   Persian 
  Gulf 
  and 
  its 
  contiguous 
  seas 
  is 
  of 
  comparatively 
  recent 
  date, 
  

   hardly 
  any 
  steps 
  having 
  been 
  taken 
  to 
  classify 
  or 
  enumerate 
  the 
  

   members 
  of 
  the 
  richest 
  family 
  occurring 
  within 
  that 
  area, 
  until 
  1875, 
  

   when 
  Messrs. 
  Geoffrey 
  and 
  Hugh 
  Nevill 
  published 
  an 
  account 
  of 
  

   " 
  New 
  Marine 
  MoUusca 
  from 
  the 
  Indian 
  Ocean, 
  mostly 
  Pleuro- 
  

   tomidoe 
  ".^ 
  In 
  this 
  treatise 
  about 
  twenty-five 
  species 
  are 
  named, 
  but 
  

   many 
  of 
  them 
  occur 
  beyond 
  our 
  assigned 
  limits. 
  These 
  were 
  all 
  well 
  

   described, 
  but 
  only 
  fairly 
  figured 
  on 
  the 
  whole. 
  Two 
  years 
  later, 
  in 
  

   1877, 
  Mr. 
  Edgar 
  Smith 
  began 
  his 
  "Diagnosis 
  of 
  new 
  species 
  of 
  

   Pleurotomidae 
  " 
  in 
  the 
  British 
  Museum,^ 
  and 
  a 
  series 
  of 
  papers 
  

   followed, 
  which 
  wei'e 
  not 
  completed 
  till 
  October, 
  1888. 
  Yery 
  

   unfortunately, 
  but 
  owing 
  to 
  no 
  fault 
  of 
  the 
  author, 
  who 
  always 
  

   spoke 
  regretfully 
  to 
  me 
  of 
  the 
  circumstances, 
  none 
  of 
  them 
  were 
  

   figured. 
  Over 
  160 
  species 
  were 
  diagnosed, 
  and 
  the 
  types 
  noted. 
  

   During 
  the 
  past 
  five 
  or 
  six 
  years 
  a 
  few 
  of 
  them 
  have 
  been 
  illustrated, 
  

   either 
  by 
  Mr. 
  C. 
  Hedley 
  ^ 
  or 
  myself,* 
  but 
  only 
  a 
  very 
  few, 
  and 
  there 
  

   can 
  be 
  no 
  concealing 
  of 
  the 
  fact 
  that 
  a 
  great 
  stumbling-block 
  to 
  the 
  

   student 
  has 
  been 
  occasioned 
  by 
  tliis 
  omission. 
  Many 
  times 
  I 
  bad 
  

   discussed 
  this 
  question 
  with 
  Mr. 
  Smith, 
  and 
  had 
  resolved 
  to 
  delineate 
  

   all 
  that 
  came 
  from 
  this 
  particular 
  province, 
  from 
  the 
  actual 
  types, 
  

   and 
  I 
  find 
  that 
  thirty-five 
  (or 
  one-fifth 
  of 
  the 
  total) 
  of 
  his 
  species 
  can 
  

   be 
  included. 
  

  

  I 
  therefore 
  venture 
  to 
  ofPer 
  now 
  the 
  three 
  plates 
  accompanying 
  

   this 
  paper, 
  as 
  some 
  slight 
  memorial 
  of 
  one 
  to 
  whom 
  molluscan 
  science 
  

   owes 
  so 
  much, 
  and 
  whose 
  unvaryingkindness, 
  attention, 
  and 
  readiness 
  

   to 
  assist 
  in 
  every 
  possible 
  way 
  those 
  who 
  asked 
  his 
  advice 
  and 
  help, 
  

   so 
  endeared 
  the 
  name 
  of 
  Edgar 
  Albert 
  Smith 
  to 
  all. 
  

  

  To 
  discover 
  these 
  types 
  I 
  liave 
  been 
  several 
  times 
  through 
  the 
  

   amassed 
  stores 
  of 
  this 
  family 
  in 
  the 
  cases 
  and 
  drawers 
  of 
  the 
  cabinets 
  

   at 
  the 
  Museum, 
  and 
  only 
  in 
  two 
  instances 
  have 
  I 
  so 
  far 
  failed 
  to 
  find 
  

   the 
  objects 
  of 
  my 
  search. 
  

  

  ' 
  Journ. 
  As. 
  Soc. 
  Bengal, 
  vol. 
  xliv, 
  pt. 
  ii, 
  1875, 
  pp. 
  83-94, 
  pis. 
  vii-viii. 
  

  

  2 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  IV, 
  vol. 
  xix, 
  1877, 
  pp. 
  488-501 
  ; 
  ser. 
  V, 
  

  

  vol. 
  X, 
  1882, 
  pp. 
  200-18, 
  296-306 
  ; 
  ser. 
  V, 
  vol. 
  xiv, 
  1884, 
  pp. 
  317-29 
  ; 
  

  

  ser. 
  V, 
  vol. 
  xviii, 
  1888, 
  pp. 
  300-17. 
  

   2 
  Mem. 
  Austral. 
  Mus., 
  iv, 
  pt. 
  vi, 
  1903, 
  p. 
  389. 
  

   ^ 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1901, 
  ii, 
  pi. 
  xxi, 
  figs. 
  4, 
  14; 
  Proc. 
  Malac. 
  Soc. 
  

  

  Lond., 
  vol. 
  X, 
  1912, 
  p. 
  251, 
  pi. 
  xi, 
  f. 
  13, 
  13a. 
  

  

  