﻿106 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  elafa, 
  THainY.: 
  Durban. 
  Central 
  cusp 
  long, 
  sharp, 
  thick; 
  side 
  cusps 
  

   rather 
  short 
  and 
  stout 
  ; 
  one 
  short 
  sharp 
  denticle 
  inside 
  the 
  side 
  

   cusps, 
  singularly 
  variable 
  in 
  size, 
  shape, 
  and 
  position 
  ; 
  it 
  becomes 
  

   sometimes 
  bifid 
  or 
  even 
  trifid 
  on 
  one 
  side, 
  rarely 
  blunt, 
  occasionally 
  

   BO 
  close 
  to 
  the 
  side 
  cusp 
  as 
  almost 
  to 
  touch 
  it 
  ; 
  base 
  narrow 
  and 
  

   much 
  extended. 
  

  

  elongata, 
  Blainv. 
  : 
  Burias 
  I. 
  Central 
  cusp 
  very 
  long, 
  pointed, 
  

   and 
  narrow 
  ; 
  side 
  cusps 
  long 
  and 
  sharp 
  ; 
  a 
  tiny 
  blunt 
  denticle 
  

   (which 
  is 
  often 
  absent 
  altogether) 
  at 
  varying 
  distances 
  from 
  the 
  

   side 
  cusp 
  ; 
  base 
  of 
  laterals 
  much 
  produced. 
  

  

  A 
  specimen 
  from 
  the 
  Cambridge 
  collection 
  (TJmkoraaas, 
  H. 
  C. 
  

   Burnup) 
  exhibits 
  a 
  prominent 
  knob 
  and 
  denticles 
  outside 
  the 
  side 
  

   cusps; 
  it 
  is 
  probably 
  a 
  mistake 
  of 
  identification. 
  

  

  fiscellum, 
  Chem. 
  : 
  Bohol. 
  Central 
  cusp 
  sharp, 
  not 
  very 
  long; 
  side 
  

   cusps 
  long, 
  sharp; 
  one 
  small 
  sharp 
  denticle 
  well 
  away 
  from 
  the 
  

   side 
  cusps 
  ; 
  a 
  long 
  distance 
  quite 
  bare 
  between 
  the 
  side 
  cusp 
  and 
  the 
  

   upper 
  angle 
  of 
  the 
  margin 
  ; 
  the 
  whole 
  tooth 
  rather 
  shallow 
  in 
  depth, 
  

   extended 
  in 
  breadth. 
  A 
  variety 
  from 
  Fiji 
  shows, 
  over 
  a 
  certain 
  portion 
  

   of 
  the 
  radula, 
  two 
  small 
  denticles, 
  or 
  a 
  single 
  bifid 
  denticle, 
  inside 
  the 
  

   side 
  cusps. 
  

  

  granulata, 
  Duel. 
  : 
  Isipingo, 
  Natal. 
  Central 
  cusp 
  short, 
  not 
  very 
  

   tliick; 
  side 
  cusps 
  projecting 
  well 
  beyond 
  it, 
  pointing 
  slightly 
  

   outwards; 
  inside 
  denticle 
  strong, 
  just 
  free 
  of 
  the 
  side 
  cusp; 
  

   a 
  wrinkle 
  rather 
  than 
  a 
  denticle 
  close 
  to, 
  on 
  the 
  outside 
  ; 
  angle 
  of 
  

   margin 
  raised 
  somewhat, 
  but 
  no 
  knob. 
  

  

  Iconlcanensis, 
  Melv. 
  : 
  Karachi. 
  Side 
  cusps 
  rather 
  large 
  ; 
  inside 
  

   denticle 
  prominent, 
  sharp 
  ; 
  whole 
  tooth 
  very 
  wide 
  and 
  shallow. 
  

  

  mar 
  gariti 
  cola, 
  Brod. 
  : 
  Bombay, 
  Karachi. 
  Central 
  cusp 
  normal 
  ; 
  

   side 
  cusps 
  small, 
  sharp, 
  slightly 
  inclined 
  inwards 
  ; 
  inside, 
  a 
  very 
  

   small 
  denticle, 
  which 
  is 
  sometimes 
  far 
  removed 
  from 
  the 
  cusp, 
  

   sometimes 
  adjacent, 
  and 
  sometimes 
  absent 
  altogether; 
  basal 
  

   projection 
  very 
  marked. 
  

  

  marginatra, 
  Blainv.: 
  Sydney. 
  Central 
  cusp 
  normal; 
  side 
  cusps 
  

   short, 
  rather 
  sharp 
  ; 
  inside, 
  a 
  prominent 
  denticle, 
  set 
  rather 
  low, 
  

   and 
  so 
  near 
  the 
  side 
  cusp 
  as 
  almost 
  to 
  seem 
  adherent. 
  

  

  A 
  specimen 
  from 
  Port 
  Jackson 
  (at 
  Cambridge) 
  shows 
  a 
  faint 
  

   raising 
  of 
  the 
  margin 
  at 
  the 
  upper 
  angles. 
  

  

  m«<nVrt^a, 
  Reeve 
  : 
  lleunion. 
  Central 
  cusp 
  remarkably 
  short, 
  and 
  

   not 
  very 
  thick 
  ; 
  side 
  cusps 
  broad 
  and 
  somewhat 
  blunt 
  ; 
  the 
  inside 
  

   denticle 
  sharp, 
  prominent, 
  very 
  close 
  to 
  the 
  side 
  cusp, 
  at 
  times 
  

   almost 
  touching. 
  

  

  mutica, 
  Lam. 
  : 
  TJmkoraaas. 
  Central 
  cusp 
  narrow 
  ; 
  side 
  cusps 
  short, 
  

   blunt; 
  inside, 
  a 
  small, 
  very 
  blunt 
  denticle, 
  close 
  to 
  the 
  side 
  cusp. 
  

  

  ochrostoma, 
  Blainv. 
  : 
  Hilo, 
  Hawaii. 
  Side 
  cusps 
  upright, 
  rather 
  

   long; 
  inside 
  denticle 
  small, 
  sharp, 
  rather 
  far 
  from 
  the 
  side 
  cusp; 
  

   a 
  considerable 
  distance 
  between 
  the 
  side 
  cusp 
  and 
  the 
  end 
  of 
  the 
  

   upper 
  margin, 
  which 
  rises 
  slightly 
  at 
  the 
  angle. 
  

  

  spectrum, 
  lleeve 
  : 
  Tonga. 
  See 
  Camhridge 
  Natural 
  History, 
  

   vol.iii, 
  p. 
  222, 
  fig. 
  124. 
  

  

  suhnodulosa, 
  Melv.: 
  Bombay. 
  Side 
  cusps 
  blunt, 
  with 
  -blunt 
  

  

  