﻿Oa 
  neio 
  MoUusca 
  from 
  Japan. 
  445 
  

  

  LI. 
  — 
  New 
  MoUusca 
  of 
  the 
  Genera 
  Pleurotoma 
  (Surcula), 
  

   Oliva, 
  and 
  Limopsis 
  from 
  Japan, 
  By 
  G. 
  B. 
  Sowerby, 
  

  

  r.L.s. 
  

  

  [Plate 
  XVIII.] 
  

  

  Pleurotoma 
  (^Surcula) 
  mirahilis. 
  (PL 
  XVIII. 
  fig. 
  1.) 
  

  

  Testa 
  elongato-fusiformis, 
  albida, 
  flammis 
  fuscis 
  obliquis 
  latiusculig 
  

   ornata, 
  spiraliter 
  lirisniimerosis 
  angustis 
  munita, 
  longitiidinaliter 
  

   oblique 
  subtilissirae 
  striata 
  ; 
  anfractus 
  12, 
  superne 
  leviter 
  con- 
  

   cavi, 
  deiude 
  couyexiiisculi 
  ; 
  anfractus 
  ultimus 
  | 
  longitudinis 
  

   testae 
  vix 
  sequans, 
  supra 
  convexiusculus, 
  deiude 
  convexus, 
  infra 
  

   elongatim 
  productus 
  ; 
  apertura 
  oblongo-ovata, 
  peristoma 
  acutum, 
  

   arcuatum, 
  postice 
  late 
  sinuatum 
  ; 
  caualis 
  elougatus, 
  latiusculus 
  ; 
  

   columella 
  laevis, 
  recti 
  uscula. 
  

  

  Long. 
  95, 
  maj. 
  diam. 
  24 
  mm. 
  

  

  Hah. 
  Nagasaki, 
  Japan. 
  

  

  The 
  broad 
  brown 
  longitudinal 
  flames 
  give 
  this 
  shell 
  a 
  

   handsome 
  appearance. 
  Its 
  nearest 
  ally 
  is 
  P. 
  australis, 
  from 
  

   which 
  it 
  differs 
  not 
  only 
  in 
  ornamentation, 
  the 
  whorls 
  being 
  

   less 
  swollen_, 
  the 
  body 
  whorl 
  longer, 
  and 
  the 
  sculpture 
  finer. 
  

  

  Oliva 
  concavospira. 
  (PI. 
  XVIII. 
  fig. 
  2.) 
  

  

  Testa 
  oblongo-cylindracea, 
  crassa, 
  straminea, 
  lineis 
  angulatim 
  undu- 
  

   latis 
  longitadinaliter 
  ornata 
  ; 
  spira 
  concavo-depressa, 
  callosa 
  ; 
  

   sutura 
  anguste 
  canaliculata 
  ; 
  apertura 
  mediocriter 
  lata, 
  intus 
  

   pallide 
  caerulesccns 
  ; 
  peristoma 
  crassiusculum, 
  postice 
  acute 
  

   elevatum 
  ; 
  columella 
  ubique 
  crassi-plicata, 
  callo 
  postico 
  elevato. 
  

  

  Long. 
  35, 
  maj. 
  diam, 
  19 
  mm. 
  

  

  Hah. 
  Loo 
  Choo. 
  

  

  This 
  species 
  exhibits 
  a 
  very 
  unusual 
  character, 
  the 
  spire 
  

   being 
  sunk 
  in 
  a 
  concavity 
  below 
  the 
  shoulder 
  of 
  the 
  body- 
  

   whorl. 
  

  

  Limopsis 
  tajimce. 
  (PI. 
  XVIII. 
  fig. 
  3.) 
  

  

  Testa 
  oblique 
  ovalis, 
  depressa, 
  concentrice 
  lirata, 
  obscurissirae 
  

   radiatim 
  striata 
  ; 
  periostracum 
  tenue, 
  fuscum, 
  radiatim 
  tenuitor 
  

   pilosum 
  ; 
  umbones 
  paulo 
  elevati. 
  Pagina 
  interna 
  laevis, 
  alba; 
  

   fossula 
  ligamentali 
  latiuscula 
  ; 
  cardo 
  mediocriter 
  lato, 
  dentibus 
  

   circiter 
  1.5 
  irregularibiis. 
  

  

  Diam. 
  antero-post. 
  28, 
  umbono-raarg. 
  23 
  mm. 
  

  

  Hab. 
  Tajima, 
  Sea 
  of 
  Japan. 
  

  

  This 
  shell 
  somewhat 
  resembles 
  L. 
  zonalis, 
  Dall 
  ; 
  the 
  

   radiating 
  rows 
  of 
  hairs 
  in 
  the 
  periostracum 
  are 
  much 
  closer 
  

   and 
  thinner. 
  

  

  