﻿MOLLUSCA. 
  489 
  

  

  base 
  are 
  much 
  deeper. 
  The 
  aperture 
  is 
  very 
  narrow, 
  the 
  outer 
  

   lip 
  being 
  thin 
  and 
  moderately 
  sinuated 
  above 
  the 
  angle. 
  The 
  spire 
  

   is 
  short, 
  gradated, 
  with 
  rectilinear 
  outlines. 
  Length 
  24 
  millim., 
  

   diameter 
  12|, 
  

  

  Providence 
  Reef, 
  Mascarenes, 
  in 
  24 
  fms. 
  

  

  I 
  have 
  named 
  this 
  species 
  in 
  honour 
  of 
  Prof. 
  E. 
  von 
  Martens, 
  

   from 
  whose 
  work 
  on 
  the 
  Mollusca 
  of 
  the 
  Mascarenes 
  I 
  have 
  obtained 
  

   much 
  information 
  and 
  assistance. 
  It 
  is 
  distinguished 
  by 
  the 
  

   narrowness 
  of 
  the 
  aperture, 
  its 
  somewhat 
  pyriform 
  shape, 
  and 
  the 
  

   uniform 
  orange 
  tint 
  of 
  its 
  colouring. 
  The 
  spire 
  is 
  paler, 
  except 
  at 
  

   the 
  deepish 
  suture, 
  which 
  is 
  likewise 
  orange. 
  

  

  11. 
  Conus 
  articulatus. 
  (Plate 
  XLIV. 
  fig. 
  B.) 
  

   Sotcerby, 
  Proc. 
  Zoul. 
  Soc. 
  1873, 
  p. 
  146, 
  pi. 
  xv. 
  ^^. 
  3. 
  

  

  Shell 
  shortly 
  fusiform, 
  brownish 
  pink, 
  encircled 
  near 
  the 
  middle 
  

   of 
  the 
  body-whorl 
  with 
  a 
  white 
  zone 
  interrupted 
  with 
  blotches 
  of 
  a 
  

   deeper 
  tint 
  than 
  the 
  general 
  ground-colour 
  of 
  the 
  shell, 
  everywhere 
  

   ornamented 
  with 
  transverse 
  rows 
  of 
  minute 
  reddish 
  dots, 
  which 
  are 
  

   invisible 
  to 
  the 
  naked 
  eye. 
  Spire 
  white, 
  terminating 
  in 
  a 
  pink 
  

   apex, 
  dotted 
  with 
  reddish 
  brown 
  upon 
  the 
  angle 
  of 
  the 
  whorls, 
  and 
  

   blotched 
  with 
  the 
  same 
  colour 
  upon 
  their 
  upper 
  surface. 
  Volutions 
  

   9, 
  slowly 
  enlarging 
  ; 
  three 
  apical 
  smooth, 
  glossy, 
  convex 
  ; 
  the 
  rest 
  

   in 
  steps 
  one 
  above 
  the 
  other, 
  sloping 
  above, 
  faintly 
  grooved 
  imme- 
  

   diately 
  beneath 
  the 
  suture, 
  the 
  furrow 
  being 
  broad, 
  occupying 
  half 
  

   the 
  upper 
  surfacs 
  of 
  the 
  whorls, 
  but 
  very 
  shallow, 
  not 
  spirally 
  

   striated, 
  exhibiting 
  only 
  fine 
  arcuate 
  lines 
  of 
  growth. 
  The 
  last 
  

   whorl 
  is 
  acutely 
  carinate 
  above, 
  very 
  faintly 
  convex 
  at 
  the 
  sides, 
  

   and 
  contracted 
  towards 
  the 
  front 
  ; 
  it 
  is 
  smooth 
  at 
  the 
  upper 
  half, 
  

   and 
  rather 
  coarsely 
  sulcated 
  across 
  beueath, 
  a 
  few 
  of 
  the 
  intervening 
  

   ridges 
  at 
  the 
  base 
  and 
  two 
  passing 
  through 
  the 
  subcentral 
  white 
  

   band 
  being 
  rather 
  more 
  distinctly 
  dotted 
  than 
  the 
  rest 
  of 
  the 
  sur- 
  

   face. 
  Aperture 
  narrow, 
  and 
  outer 
  lip 
  thin 
  and 
  slightly 
  sinuated 
  

   behind. 
  Length 
  12 
  millim., 
  diameter 
  6. 
  

  

  Providence 
  lleef, 
  Mascarenes, 
  in 
  24 
  fms. 
  

  

  This 
  species 
  is 
  represented 
  in 
  Weinkauff's 
  monograph 
  of 
  this 
  

   genus 
  (Conch.-Cab. 
  pi. 
  .50. 
  figs. 
  1 
  & 
  4) 
  under 
  the 
  name 
  of 
  C. 
  ana- 
  

   batram. 
  C. 
  anabatJirum 
  of 
  Crosse 
  is, 
  however, 
  perfectly 
  distinct 
  

   from 
  the 
  species 
  here 
  described, 
  but 
  is 
  regarded 
  by 
  myself 
  as 
  a 
  

   variety 
  of 
  C. 
  japonictts, 
  Hwass. 
  

  

  The 
  locality 
  " 
  Mauritius 
  " 
  quoted 
  by 
  Weinkauff 
  is 
  confirmatory 
  of 
  

   the 
  conclusion 
  arrived 
  at 
  that 
  his 
  shell 
  belongs 
  to 
  the 
  same 
  species 
  

   as 
  that 
  from 
  Providence 
  Reef, 
  and 
  the 
  figure, 
  although 
  representing 
  

   a 
  larger 
  specimen, 
  is 
  fairly 
  characteristic. 
  

  

  12. 
  Pleurotoma 
  (Defrancia 
  ?) 
  grisea. 
  (Plate 
  XLIV. 
  fig. 
  C.) 
  

  

  Shell 
  very 
  small, 
  subfusiformly 
  ovate, 
  grey 
  or 
  dirty 
  white, 
  some- 
  

   times 
  spotted 
  with 
  brown 
  below 
  the 
  suture, 
  or 
  exhiliiting 
  one 
  or 
  

   two 
  pale 
  or 
  whitish 
  spiral 
  linos. 
  Whorls 
  8 
  ; 
  first 
  4-J 
  white, 
  smooth, 
  

  

  