﻿MELVILL 
  : 
  TURRID^ 
  OF 
  THE 
  PERSIAN 
  GULF, 
  ETC. 
  157 
  

  

  A 
  plum-coloured 
  sh'ell, 
  larger 
  in 
  all 
  its 
  parts 
  tlian 
  tJiconstans, 
  Sm., 
  

   being 
  of 
  the 
  same 
  alliance. 
  The 
  largest 
  specimen 
  I 
  have 
  seen 
  

   measures 
  long. 
  18 
  mm. 
  as 
  against 
  8-50 
  mm. 
  in 
  inconstans. 
  Indeed, 
  

   the 
  type 
  of 
  the 
  latter 
  only 
  measures 
  5 
  ram. 
  

  

  The 
  nearest 
  ally 
  seems 
  D. 
  radula, 
  Hinds 
  (Moll. 
  Voy. 
  Sulphur, 
  

   1844, 
  p. 
  16, 
  pi. 
  V, 
  f. 
  9), 
  from 
  the 
  Straits 
  of 
  Malacca 
  and 
  Australia 
  

   (Queensland), 
  well 
  figured 
  by 
  Reeve 
  (Conch. 
  Icon., 
  pi. 
  xxv, 
  f. 
  223). 
  

   The 
  nodules 
  in 
  radula 
  are 
  shining 
  white, 
  contrasting 
  with 
  the, 
  

   dark-brown 
  body-colour. 
  I 
  have 
  examples 
  from 
  the 
  Lombe 
  Taylor 
  

   Collection. 
  It 
  is 
  larger 
  (long. 
  20 
  mm.) 
  and 
  coarser 
  in 
  its 
  sculpture 
  

   than 
  prunulum, 
  the 
  largest 
  specimen 
  of 
  which 
  that 
  we 
  have 
  seen 
  comes 
  

   from 
  Koweit, 
  and 
  measures 
  long. 
  15 
  mm. 
  The 
  noduled 
  ril)lets 
  are 
  

   here 
  almost 
  twice 
  the 
  number 
  of 
  those 
  obtaining 
  in 
  radula. 
  Notwith- 
  

   standing 
  this, 
  doubtless 
  mconstan<i, 
  lithoria, 
  prunulum, 
  pyramidula, 
  

   and 
  radula 
  have 
  many 
  characters 
  in 
  common, 
  and 
  probably 
  spring 
  from 
  

   a 
  common 
  ancestor. 
  

  

  44. 
  Drillia 
  ptramidcla 
  (lleeve). 
  (PI. 
  X, 
  Fig. 
  2.) 
  

   Fleurotoma 
  pr/ramidula,lieeye, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1845, 
  p. 
  115. 
  

   ,, 
  ,, 
  Reeve, 
  Conch. 
  Icon., 
  vol. 
  i, 
  1845, 
  pi. 
  xxix, 
  

  

  f. 
  260. 
  

   Clathurella 
  „ 
  Melv.& 
  St., 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1901, 
  p. 
  445. 
  

  

  P.G. 
  Koweit, 
  10 
  fathoms. 
  Henjara 
  Island, 
  Muscat, 
  10 
  fatlioms. 
  

   Kuh 
  i 
  Mubarik, 
  45 
  fathoms. 
  

  

  M.C. 
  Charbar, 
  40 
  fathoms. 
  

  

  So 
  allied 
  to 
  incomtans, 
  Smith, 
  that 
  I 
  have 
  caused 
  the 
  two 
  to 
  be 
  

   figured 
  in 
  approximation 
  to 
  each 
  other, 
  to 
  show 
  the 
  chief 
  distinctions, 
  

   which 
  are: 
  [a) 
  in 
  form, 
  the 
  present 
  species 
  tapering 
  gradually 
  to 
  the 
  

   apex, 
  whilst 
  inconstans 
  is 
  of 
  more 
  abbreviate 
  build. 
  Again 
  (6), 
  the 
  

   spiral 
  nodules 
  so 
  conspicuous 
  a 
  feature 
  in 
  Smith's 
  species 
  are 
  hardly 
  

   present 
  in 
  its 
  ally, 
  pyramidula 
  being, 
  to 
  quote 
  the 
  words 
  in 
  tlie 
  

   original 
  description, 
  " 
  ])yramidally 
  elongated, 
  very 
  closely 
  latticed 
  

   Avith 
  minute 
  longitudinal 
  and 
  transverse 
  ridges." 
  The 
  second 
  and 
  

   third 
  nuclear 
  whorls 
  are 
  carinate. 
  

  

  45. 
  Drillia 
  resplendens, 
  Melv. 
  

   Drillia 
  respletidens, 
  Melvill, 
  ^fem. 
  Manch. 
  Soc, 
  vol. 
  xlii, 
  1898, 
  No. 
  4, 
  

   p. 
  11, 
  pi. 
  ii, 
  f. 
  8. 
  

   ,, 
  „ 
  Melv. 
  & 
  St., 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1901, 
  p. 
  439, 
  

  

  pi. 
  xxi, 
  f. 
  1 
  1. 
  

   P.G. 
  Muscat, 
  7-10 
  fathoms. 
  Gulf 
  of 
  Oman, 
  lat. 
  24° 
  55' 
  N., 
  long. 
  

   57° 
  59' 
  E., 
  37 
  fathoms, 
  sand 
  and 
  mud, 
  only 
  in 
  young 
  condition. 
  

  

  On 
  the 
  telegraph 
  cable 
  in 
  three 
  or 
  four 
  places 
  amongst 
  shell 
  and 
  

   other 
  growths 
  it 
  attains 
  a 
  fair 
  size 
  (20-2 
  mm.), 
  and 
  is 
  remarkably 
  

   polished 
  and 
  fine 
  in 
  deep 
  red-brown 
  colour. 
  An 
  albino 
  variety 
  

   occurred 
  off 
  Muscat. 
  A 
  very 
  bright 
  and 
  beautiful 
  species, 
  one 
  of 
  the 
  

   most 
  admired 
  of 
  the 
  genus, 
  and 
  belonging 
  to 
  the 
  same 
  section 
  of 
  the 
  

   genus 
  aslucida, 
  Nevill, 
  and 
  perxica, 
  Sm., 
  tlie 
  variety 
  yacm^-^a 
  of 
  which, 
  

   just 
  described 
  above, 
  almost 
  exceeds 
  resplendens, 
  if 
  possible, 
  in 
  select 
  

   elegance. 
  

  

  