﻿146 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETT. 
  

  

  the 
  sutures, 
  and 
  the 
  many 
  close 
  longitudinal 
  lirse 
  or 
  costulse 
  descending 
  

   obliquely. 
  The 
  colour 
  varies 
  from 
  reddish 
  brown 
  to 
  full 
  cclireous, 
  

   the 
  latter 
  colour 
  predominant. 
  There 
  are 
  specimens 
  in 
  the 
  National 
  

   Collection 
  from 
  Ceylon, 
  the 
  Persian 
  Gulf, 
  and 
  China 
  seas. 
  The 
  

   original 
  type 
  is 
  now 
  figured. 
  

  

  § 
  Subgen. 
  TOMOPLEURA, 
  Casey, 
  1904. 
  

  

  10. 
  TuREis 
  (Tomopleuka) 
  acutigemmata 
  (Sm.). 
  (PI. 
  VIII, 
  Fig. 
  1.) 
  

  

  Pleurotoma 
  acutigemmata, 
  E. 
  A. 
  Smith, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  iv, 
  

   vol. 
  xix, 
  1877, 
  p. 
  489. 
  

  

  P.G. 
  Gulf 
  of 
  Oman, 
  Muscat, 
  20-40 
  fathoms. 
  

  

  I. 
  Lat. 
  18° 
  58' 
  N., 
  long. 
  71° 
  45' 
  E., 
  40 
  fathoms. 
  

  

  The 
  locality 
  of 
  the 
  type, 
  now 
  figured 
  for 
  the 
  first 
  time, 
  is 
  unknown. 
  

   In 
  my 
  opinion, 
  this 
  may 
  stand 
  as 
  distinct 
  from 
  j'ubata, 
  Hinds, 
  to 
  

   which, 
  however, 
  it 
  is 
  very 
  nearly 
  allied. 
  Tlie 
  author 
  lays 
  stress 
  on 
  

   the 
  form 
  being 
  narrower, 
  tubercles 
  larger, 
  and 
  canal 
  more 
  abbreviate. 
  

   It 
  is 
  merged 
  by 
  Tryon 
  (Man. 
  Conch., 
  vi, 
  pp. 
  171, 
  172) 
  with 
  Hinds' 
  

   species, 
  but 
  this 
  evidently 
  only 
  on 
  surmise, 
  since 
  he 
  luid 
  never 
  beheld 
  

   acutigemmata. 
  We 
  liave 
  it 
  also 
  from 
  the 
  Andaman 
  Islands 
  (Booley).^ 
  

  

  Toinopleura, 
  Casey,* 
  was 
  instituted 
  as 
  a 
  genus, 
  while 
  Gemmula, 
  

   Weink., 
  has 
  been 
  also 
  raised 
  to 
  the 
  same 
  rank. 
  I 
  prefer 
  treating 
  both 
  

   as 
  sub-genera 
  for 
  the 
  present. 
  

  

  11. 
  TuRRus 
  (Tomopleura) 
  circumvertens 
  (Melv. 
  & 
  Stand.). 
  

  

  Brillia 
  circumvertens, 
  Melvill 
  & 
  Standen, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  

   1901, 
  p. 
  436, 
  pi. 
  xxiii, 
  f. 
  3. 
  

  

  P.G. 
  Gulf 
  of 
  Oman, 
  lat. 
  24° 
  49' 
  N., 
  long. 
  51° 
  56' 
  E., 
  225 
  fathoms, 
  

   mud; 
  and 
  lat. 
  24° 
  58' 
  N., 
  long. 
  56° 
  54' 
  E., 
  156 
  fathoms. 
  

  

  A 
  small 
  white 
  species, 
  of 
  peculiar 
  sculpture. 
  The 
  two 
  uppermost 
  

   nuclear 
  whorls 
  are 
  smooth, 
  globular, 
  and 
  shining, 
  the 
  two 
  succeeding, 
  

   longitudinally 
  nodulously 
  costate, 
  the 
  rest 
  pronouncedly 
  excavate 
  at 
  

   the 
  sutures, 
  a 
  strong 
  carina 
  or 
  keel 
  just 
  below, 
  on 
  each 
  whorl, 
  and 
  

   another 
  just 
  above 
  the 
  sutures, 
  the 
  intermediate 
  space 
  smooth 
  with 
  

   crescent-shaped 
  striation, 
  the 
  lower 
  keel 
  is 
  the 
  strongest, 
  canal 
  only 
  

   slightly 
  produced, 
  spiral 
  lirae 
  running 
  below 
  the 
  periphery 
  to 
  the 
  

   base, 
  twelve 
  or 
  thirteen 
  in 
  number. 
  Long. 
  6, 
  lat. 
  2-25 
  mm. 
  

  

  12. 
  TuRRis 
  (Tomopleura) 
  fagina 
  (Ad. 
  & 
  Rve.). 
  

  

  Pleurotoma 
  fagina, 
  Adams 
  & 
  Peeve, 
  Voy. 
  Samarang, 
  Moll., 
  pt. 
  2, 
  1850, 
  

   p. 
  40, 
  pi. 
  ix, 
  f. 
  2, 
  a-h. 
  

   ,, 
  ,, 
  Tryon, 
  Man. 
  Conch., 
  vol. 
  vi, 
  1884, 
  p. 
  167, 
  pi. 
  iii, 
  

  

  f. 
  22. 
  

   P.G. 
  Henjam 
  Island, 
  46 
  fathoms, 
  sand, 
  

  

  A 
  large 
  species, 
  dark 
  brown, 
  with 
  regular 
  spiral 
  ribs. 
  Only 
  one 
  

   specimen 
  dredged. 
  The 
  type 
  came 
  from 
  China. 
  It 
  may 
  be 
  considered 
  

   one 
  of 
  the 
  rarer 
  species. 
  

  

  ^ 
  Casey, 
  Trans. 
  Acad. 
  Sci. 
  St. 
  Louis, 
  vol. 
  xiv, 
  1904, 
  p. 
  138. 
  

   - 
  Proc. 
  Malac. 
  Soc. 
  Lond., 
  vol. 
  ii, 
  1897, 
  p. 
  165. 
  

  

  