﻿MOLLIJSCA. 
  491 
  

  

  17. 
  Terebra 
  (Hastula) 
  casta. 
  

  

  Hinds, 
  Sotverbys 
  Thesaurus, 
  vol. 
  i. 
  pi. 
  44. 
  fig. 
  S4. 
  _ 
  

  

  Terebra 
  hastata 
  (part.), 
  lieeve, 
  Couch. 
  Icon. 
  vol. 
  xii. 
  fig. 
  81 
  h. 
  

  

  Var. 
  = 
  Terebra 
  albula, 
  Hinds 
  (non 
  Menke), 
  I. 
  c. 
  pi. 
  45. 
  fig. 
  12(5. 
  

  

  Var. 
  = 
  Terebra 
  incolor, 
  Deshayes, 
  Froc. 
  Zool. 
  Soc. 
  1859, 
  p. 
  283. 
  

  

  Var. 
  = 
  Terebra 
  bipartita, 
  Desh. 
  I. 
  c. 
  p. 
  284. 
  

  

  Var. 
  = 
  Terebra 
  mera, 
  Hinds, 
  I. 
  c. 
  pi. 
  45. 
  fig. 
  108. 
  

  

  Cerf 
  Island, 
  Mascarenes, 
  10 
  fms., 
  sand 
  {Copiyhujcr) 
  ; 
  Philippines, 
  

   Lizard 
  Island, 
  Swan 
  liiver, 
  Seychelles, 
  and 
  Sandwich 
  Islands 
  {Brit. 
  

   Museum). 
  

  

  Reeve 
  is 
  wrong 
  in 
  confusing 
  the 
  West-Indian 
  T. 
  Imstata 
  wath 
  this 
  

   species. 
  That 
  is 
  a 
  more 
  robust 
  form, 
  with 
  much 
  stouter 
  riblets 
  

   extending 
  from 
  suture 
  to 
  suture. 
  

  

  18. 
  Murex 
  (Chicoreus) 
  adustus, 
  Lamarcl: 
  

   Sej'chelle 
  Islands, 
  4-12 
  fms., 
  sand 
  and 
  coral. 
  

  

  19, 
  Murex 
  (Ocinehra) 
  piimilus. 
  (Plate 
  XLIV. 
  fig. 
  D.) 
  

  

  Murex 
  pumilus, 
  A. 
  Adams, 
  Proc. 
  Zool. 
  Soc. 
  1853, 
  p. 
  70 
  ; 
  Sowerby, 
  

   Thesaurus, 
  vol. 
  iv. 
  pi. 
  400. 
  fig. 
  200 
  (enlarged). 
  

  

  Darros 
  Island, 
  Amirantes, 
  in 
  22 
  fms., 
  on 
  a 
  broken-coral 
  bottom 
  ; 
  

   China 
  Sea 
  (Adams). 
  

  

  This 
  charming 
  little 
  species 
  consists 
  of 
  seven 
  whorls, 
  three 
  apical 
  

   smooth 
  and 
  convex, 
  and 
  four 
  normal. 
  It 
  is 
  of 
  a 
  pink 
  or 
  almost 
  

   scarlet 
  colour, 
  has 
  six 
  rounded 
  costie 
  on 
  the 
  body-whorl 
  and 
  seven 
  

   on 
  the 
  upper 
  volutions 
  ; 
  these 
  are 
  crossed 
  by 
  scabrous 
  spiral 
  ridges, 
  

   of 
  which 
  there 
  are 
  two 
  to 
  three 
  principal 
  ones 
  on 
  the 
  upper 
  whorls, 
  

   more 
  slender 
  ones 
  intervening 
  between 
  them 
  and 
  the 
  suture, 
  and 
  

   about 
  seven 
  on 
  the 
  last. 
  The 
  entire 
  surface 
  is 
  beautifully 
  orna- 
  

   mented 
  by 
  raised 
  lines 
  of 
  growth, 
  so 
  that 
  the 
  transverse 
  ridges 
  are 
  

   very 
  prettily 
  squamose. 
  The 
  aperture 
  is 
  small, 
  ovate, 
  and 
  contracted 
  

   anteriorly 
  into 
  a 
  narrow 
  but 
  not 
  closed 
  canal. 
  The 
  labrum 
  is 
  well 
  

   thickened 
  exteriorly 
  by 
  the 
  last 
  varix, 
  crenulated 
  at 
  the 
  thin 
  margin, 
  

   and 
  finely 
  Urate 
  within. 
  Sowerby 
  mentions 
  an 
  orange-coloured 
  

   variety 
  of 
  this 
  species 
  : 
  but 
  this 
  is 
  unknown 
  to 
  me. 
  His 
  figure 
  is 
  

   very 
  coarsely 
  executed, 
  magnified 
  to 
  more 
  than 
  twice 
  the 
  actual 
  

   length 
  of 
  the 
  shell, 
  and 
  shows 
  only 
  four 
  costa? 
  on 
  the 
  whorls, 
  whilst 
  

   five 
  are 
  always 
  visible 
  frona 
  any 
  point 
  of 
  view. 
  

  

  20. 
  Murex 
  (Ocinebra; 
  infans. 
  (Plate 
  XLIV. 
  fig. 
  E.) 
  

  

  Shell 
  small, 
  ovately 
  fusiform, 
  whitish, 
  stained 
  with 
  brown 
  behind 
  

   the 
  longitudinal 
  ribs. 
  Whorls 
  7, 
  three 
  apical 
  smooth, 
  convex 
  ; 
  tho 
  

   rest 
  obliquely 
  sloping 
  ebove, 
  the 
  slightest 
  concave, 
  then 
  sharply 
  

   angled, 
  straight 
  below 
  the 
  angle 
  and 
  sloping 
  inwards 
  a 
  little 
  to 
  

   the 
  suture 
  beneath 
  ; 
  they 
  are 
  strcnglhencd 
  with 
  moderately 
  strong 
  

   longitudinal 
  costa;, 
  crossed 
  by 
  stout 
  spiral 
  ridges 
  and 
  finer 
  lira?. 
  

  

  