﻿66 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  68. 
  Cerithium 
  torresi. 
  (Plate 
  V. 
  fig. 
  0.) 
  

  

  Shell 
  elongate-pyramidal, 
  white, 
  blackish 
  towards 
  the 
  apex, 
  

   ornamented 
  with 
  transverse 
  series 
  of 
  dark-brown 
  dots 
  upon 
  the 
  

   lira) 
  between 
  the 
  longitudinal 
  granose 
  costte. 
  Whorls 
  11, 
  very 
  

   slightly 
  convex, 
  separated 
  by 
  a 
  deej^ish 
  suture, 
  costate 
  and 
  trans- 
  

   versely 
  lirate, 
  the 
  points 
  of 
  intersection 
  of 
  the 
  ribs 
  and 
  ridges 
  being 
  

   developed 
  into 
  prominent 
  white 
  nodules. 
  The 
  spiral 
  lirai 
  which 
  

   become 
  nodulous 
  are 
  three 
  in 
  number 
  in 
  the 
  upper 
  whorls, 
  the 
  

   uppermost 
  being 
  situated 
  close 
  to 
  the 
  suture, 
  the 
  next 
  a 
  little 
  above 
  

   the 
  middle, 
  and 
  the 
  lowermost 
  below 
  it, 
  but 
  more 
  remote 
  from 
  the 
  

   suture 
  than 
  the 
  uppermost. 
  In 
  addition, 
  there 
  are 
  one 
  or 
  more 
  

   simple 
  thread-like 
  lines 
  revolving 
  between 
  the 
  granulous 
  ridges, 
  

   which 
  arc 
  also 
  articulated 
  with 
  brown. 
  The 
  body-whorl 
  has 
  about 
  

   eight 
  principal 
  transverse 
  ridges, 
  of 
  which 
  the 
  three 
  uppermost 
  are 
  

   the 
  thickest, 
  the 
  two 
  next 
  rather 
  finer 
  and 
  also 
  granulous, 
  the 
  

   three 
  remaining 
  ones 
  being 
  still 
  more 
  slender 
  and 
  more 
  feebly 
  

   nodulous. 
  The 
  longitudinal 
  ribs 
  are 
  about 
  twelve 
  on 
  a 
  whorl, 
  one 
  

   of 
  them 
  being 
  swollen 
  or 
  varicose. 
  The 
  last 
  varix 
  on 
  the 
  body- 
  

   whorl 
  is 
  situated 
  on 
  the 
  left 
  of 
  the 
  aperture 
  ; 
  this 
  is 
  small, 
  obliquely 
  

   oval, 
  terminating 
  anteriorly 
  in 
  a 
  short, 
  oblique, 
  and 
  ver)^ 
  slightly 
  

   recurved 
  canal. 
  The 
  columella 
  is 
  considerably 
  arched, 
  white, 
  

   covered 
  with 
  a 
  thin 
  callosity, 
  developed 
  at 
  the 
  upper 
  part 
  into 
  an 
  

   elongate 
  ridge 
  which 
  runs 
  within 
  the 
  aperture. 
  Labrum 
  varixed 
  

   externally, 
  also 
  thickened 
  a 
  little 
  within 
  and 
  shallowly 
  grooved, 
  

   the 
  grooves 
  corresponding 
  with 
  the 
  external 
  ridges. 
  Length 
  l-ik 
  

   millim., 
  diam. 
  5 
  ; 
  aperture 
  4| 
  long 
  and 
  2| 
  wide. 
  

  

  Hab. 
  Prince 
  of 
  Wales 
  Channel, 
  Torres 
  Straits, 
  3-4 
  fms. 
  

  

  69. 
  Cerithium 
  (Colina) 
  macrostoma. 
  

  

  Cerithium 
  macrsotoma, 
  Hinds, 
  Voi/. 
  'Sulphur,' 
  p. 
  27, 
  pi. 
  xvi. 
  figs. 
  11, 
  

   12 
  ; 
  Stnoerhy, 
  Thes. 
  Conch, 
  pi. 
  184. 
  fig. 
  219 
  ; 
  id. 
  Conch. 
  Icon, 
  figs. 
  

   U8a,b. 
  

   Var. 
  = 
  Colina 
  pupiformis, 
  A. 
  Ada7ns, 
  Proc. 
  Zool. 
  Sac. 
  1853, 
  p. 
  17G, 
  

   pi. 
  XX. 
  tig. 
  14 
  (enlarged). 
  

   = 
  Cerithium 
  pupEeforme 
  (A. 
  Adams), 
  Sowerhy, 
  Thes. 
  Conch. 
  

   vol. 
  ii. 
  pi. 
  184. 
  fig. 
  221 
  ; 
  id. 
  Conch. 
  Icon. 
  figs. 
  122 
  a, 
  h 
  (bad 
  !). 
  

   Var. 
  = 
  Colina 
  costata, 
  A. 
  Admns, 
  P. 
  Z. 
  S. 
  1854, 
  p. 
  86. 
  

  

  = 
  Cerithium 
  costiferum, 
  Sotcerby, 
  Thes. 
  Conch, 
  vol. 
  ii. 
  pi. 
  184. 
  

   figs. 
  222; 
  id. 
  Conch. 
  Icon. 
  figs. 
  117 
  «, 
  b. 
  

   Var. 
  = 
  Colina 
  pygmaea, 
  H, 
  Adams, 
  P)-oc. 
  Zool. 
  Soc. 
  1867, 
  p. 
  308, 
  

   pi. 
  19. 
  fig. 
  19. 
  

  

  Ilab. 
  Thursday 
  Island, 
  Torres 
  Straits, 
  5-7 
  fms. 
  {Coppinrn'r) 
  : 
  

   Straits 
  of 
  Macassar, 
  11 
  fms, 
  (Hinds); 
  Damaguete, 
  Philippine 
  

   Islands 
  (Cuminf/ 
  for 
  C 
  . 
  pupifonnis) 
  ; 
  Philippine 
  Islands 
  {Cuming 
  

   for 
  C. 
  costata) 
  ; 
  Borneo 
  (//. 
  Adams 
  for 
  C. 
  pygmcea). 
  

  

  The 
  above-named 
  and 
  so-called 
  species 
  I 
  believe 
  to 
  be 
  mere 
  

   variations 
  of 
  one 
  and 
  the 
  same 
  shell. 
  Compare 
  the 
  extreme 
  forms 
  

   (C. 
  macrostoma 
  and 
  C. 
  pygmcea), 
  and 
  one 
  perceives 
  a 
  vast 
  difference 
  

   in 
  outline 
  and 
  the 
  number 
  of 
  whorls 
  ; 
  but 
  even 
  here 
  several 
  features 
  

   in 
  common 
  will 
  be 
  fgund, 
  namely 
  the 
  spotted 
  expanded 
  outer 
  lip, 
  

  

  