﻿MELVILL 
  : 
  TUKllID^ 
  OF 
  THE 
  PEKSIAN 
  GULF, 
  ETC. 
  141 
  

  

  I 
  may 
  add 
  that 
  more 
  than 
  180 
  species 
  are 
  treated 
  of 
  in 
  this 
  paper, 
  

   and 
  one-half 
  of 
  them 
  have 
  been 
  described 
  as 
  new, 
  mainly 
  from 
  

   Mr. 
  Townseud's 
  collections. 
  The 
  types 
  are 
  all 
  in 
  the 
  British 
  Museum. 
  

   The 
  Turridse 
  (Bolten's 
  name 
  Turn's, 
  1798, 
  antedating 
  Lamarck's 
  

   Pletirotojna, 
  1799) 
  are 
  certainly 
  among 
  the 
  most, 
  if 
  not 
  the 
  most, 
  

   attractive 
  of 
  all 
  the 
  genera 
  of 
  marine 
  moUusca, 
  and 
  at 
  the 
  same 
  time 
  

   the 
  most 
  difficult 
  to 
  classify 
  properly. 
  This 
  fact 
  really 
  adds 
  incentive 
  

   to 
  tlieir 
  study, 
  coupled 
  with 
  their 
  infinite 
  variety 
  of 
  contour, 
  the 
  

   many 
  rare 
  and 
  abysmal 
  forms, 
  and 
  the 
  certainty 
  of 
  additions 
  occurring 
  

   to 
  the 
  family 
  whenever 
  new 
  ground 
  — 
  or 
  rather 
  seas 
  — 
  are 
  examined. 
  

   Yet, 
  so 
  far, 
  no 
  student 
  has 
  made 
  this 
  one 
  group 
  his 
  life-work. 
  

   I 
  am 
  convinced 
  that 
  the 
  fossil 
  forms 
  (mostly 
  Tertiary) 
  should 
  be 
  

   studied 
  pari 
  passu 
  with 
  the 
  recent, 
  before 
  any 
  satisfactory 
  headway 
  

   towards 
  the 
  much-needed 
  accurate 
  classification 
  can. 
  possibly 
  be 
  

   reached. 
  

  

  Mr. 
  T. 
  L. 
  Casey' 
  has 
  attempted 
  this 
  with 
  some 
  measure 
  of 
  success 
  

   as 
  regards 
  the 
  larger 
  forms, 
  both 
  recent 
  and 
  fossil, 
  though 
  he 
  has 
  

   evidently 
  mainly 
  worked 
  out 
  the 
  species 
  of 
  the 
  last 
  named 
  in 
  the 
  

   United 
  States 
  far 
  more 
  completely 
  than 
  those 
  of 
  the 
  Old 
  World. 
  

   He 
  creates 
  various 
  new 
  genera 
  for 
  the 
  more 
  pronounced 
  species. 
  of 
  

   considerable 
  size, 
  but 
  notes 
  liis 
  inability 
  " 
  after 
  long 
  and 
  patient 
  

   study 
  of 
  rather 
  large 
  material 
  to 
  devise 
  a 
  system 
  of 
  characters 
  to 
  

   serve 
  for 
  the 
  definition 
  of 
  the 
  subtribal 
  groups" 
  he 
  includes 
  under 
  

   the 
  collective 
  term 
  Daphnellini. 
  

  

  For 
  the 
  sake 
  of 
  convenience, 
  an 
  alphabetical 
  sequence 
  has 
  been 
  

   adopted 
  in 
  the 
  enumeration 
  of 
  all 
  the 
  following 
  species 
  under 
  what 
  

   I 
  assume 
  to 
  be 
  their 
  proper 
  genera, 
  but 
  I 
  liave 
  endeavoui-ed, 
  in 
  the 
  

   remarks 
  that 
  accompany 
  each, 
  to 
  name 
  their 
  most 
  likely 
  affinities. 
  

  

  A 
  large 
  proportion 
  of 
  the 
  forms 
  from 
  this 
  region 
  are 
  endemic, 
  so 
  

   far 
  as 
  is 
  known, 
  and 
  certain 
  of 
  them 
  are 
  very 
  conspicuous 
  for 
  beauty 
  

   of 
  contour 
  or 
  coloration. 
  In 
  the 
  first 
  category 
  might 
  be 
  placed 
  such 
  

   species 
  as 
  Turris 
  invicta, 
  Mnngilia 
  Toivnsendi, 
  Clatatula 
  navarchus, 
  

   and 
  Drillia 
  tasconhim 
  ; 
  in 
  the 
  second, 
  JJrillia 
  resplendens, 
  D. 
  persica 
  

   var. 
  jacintha, 
  and 
  Cythara 
  hyper 
  calles. 
  ^lany 
  Baphnellm 
  and 
  Fleuro- 
  

   tomellce, 
  the 
  ten 
  species 
  of 
  the 
  latter 
  not 
  yet 
  being 
  known 
  elsewhere, 
  

   are 
  of 
  exquisite 
  and 
  most 
  delicate 
  design, 
  pure 
  white, 
  and 
  abysmal 
  in 
  

   distribution. 
  It 
  has 
  been 
  found 
  necessary 
  to 
  institute 
  a 
  sub-genus 
  

   {Diaiiyasma) 
  for 
  the 
  curious 
  Daphnella 
  epicliarta, 
  M. 
  & 
  St., 
  and 
  anotlier 
  

   ( 
  Veprecula) 
  for 
  a 
  series 
  of 
  deep-water 
  Clathurellm 
  with 
  nuclear 
  and 
  

   other 
  peculiarities. 
  Doubtless, 
  as 
  hinted 
  by 
  Mr. 
  Casey, 
  the 
  vast 
  

   genus 
  Manyilia 
  will 
  be 
  subdivided 
  when 
  the 
  relations 
  of 
  the 
  species 
  

   are 
  better 
  known 
  ; 
  indeed, 
  I 
  believe 
  ]\Ir. 
  Iredale, 
  to 
  whom 
  I 
  am 
  very 
  

   greatly 
  indebted 
  for 
  many 
  useful 
  hints 
  in 
  nomenclature, 
  already 
  has 
  

   tlie 
  matter 
  in 
  hand. 
  

  

  It 
  now 
  only 
  remains 
  for 
  me 
  to 
  thank 
  also 
  Mr. 
  J. 
  E,. 
  le 
  Brockton 
  

   Tomlin 
  for 
  considerable 
  assistance 
  ; 
  and 
  Mr. 
  11. 
  Standen, 
  with 
  whom 
  

   I 
  collaborated 
  in 
  the 
  first 
  enumeration 
  of 
  this 
  Family,^ 
  as 
  far 
  as 
  the 
  

  

  1 
  Trans. 
  Acad. 
  Sci. 
  St. 
  Louis, 
  vol. 
  xiv, 
  1904, 
  pp. 
  123-70. 
  

   - 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1901, 
  pp. 
  327-460. 
  

  

  