﻿316 
  proceedings 
  of 
  the 
  malacologicat, 
  society. 
  

  

  2. 
  Desckiption 
  of 
  ISTew 
  Speciks. 
  

   Peeisteknia 
  venusta, 
  n.sp. 
  

  

  Testa 
  minima, 
  breviter 
  fusiformis, 
  albida, 
  ad 
  apicem 
  et 
  antice 
  rosacea, 
  

   circa 
  medium 
  anfractuum 
  linea 
  fusca 
  cincta, 
  infra 
  suturam 
  inter 
  costas 
  

   roseo 
  maculata 
  ; 
  anfractus 
  7, 
  duo 
  apicales 
  laeves 
  convexi 
  mammillse- 
  

   formi, 
  caeteri 
  oblique 
  rotunde 
  costati 
  et 
  spiraliter 
  lirati, 
  lineis 
  incre- 
  

   menti 
  conspicuis 
  sculpti 
  ; 
  anf'r. 
  ultimus 
  costis 
  septem 
  infra 
  medium 
  

   evanescentibus 
  instructus, 
  liris 
  spiralibus 
  circiter 
  undecim 
  (quarto, 
  

   sexto, 
  et 
  octavo 
  fuscis) 
  ornatus, 
  inter 
  liras 
  spiraliter 
  striatus 
  ; 
  apertura 
  

   parva, 
  antice 
  oblique 
  canaliculata 
  ; 
  labrum 
  intus 
  tenuiter 
  denticulatum 
  ; 
  

   ■columella 
  in 
  medio 
  biplicata, 
  rosacea. 
  Long. 
  7, 
  diam. 
  3 
  mm.; 
  apertura 
  

   cum 
  canali 
  3 
  mm. 
  longa, 
  1-25 
  lata. 
  

  

  Hah. 
  — 
  Flying 
  Fisli 
  Cove, 
  in 
  45 
  fathoms. 
  One 
  specimen. 
  

  

  One 
  of 
  the 
  smallest 
  species 
  of 
  the 
  genus 
  and 
  allied 
  to 
  P. 
  iniuensis, 
  

   Melvill, 
  from 
  Savage 
  Island, 
  Oceania. 
  It 
  is, 
  however, 
  a 
  little 
  

   narrower 
  than 
  that 
  species, 
  has 
  more 
  numerous 
  and 
  finer 
  spiral 
  lirse, 
  

   and 
  is 
  also 
  distinguished 
  by 
  the 
  brown 
  thread-like 
  line, 
  which, 
  passing 
  

   round 
  the 
  body-whorl, 
  revolves 
  up 
  the 
  spire. 
  The 
  rosy 
  spots 
  between 
  

   the 
  upper 
  ends 
  of 
  the 
  costse 
  also 
  constitute 
  a 
  distinguishing 
  feature. 
  

  

  The 
  lines 
  of 
  growth 
  are 
  well 
  marked 
  and 
  sufficientlj^ 
  strong 
  on 
  

   crossing 
  the 
  spiral 
  lirse 
  to 
  give 
  them 
  a 
  crenulated 
  appearance. 
  The 
  

   two 
  plicae 
  on 
  the 
  columella 
  are, 
  in 
  fact, 
  the 
  continuation 
  of 
  two 
  lirse 
  

   upon 
  the 
  end 
  of 
  the 
  whorl. 
  

  

  Nassa 
  exulata, 
  n.sp. 
  

  

  Testa 
  elongata, 
  angusta, 
  acuminata, 
  alba, 
  dilute 
  fusco 
  interrupts 
  

   balteata 
  ; 
  spira 
  elongata, 
  acuminata 
  ; 
  anfractus 
  9, 
  tres 
  apicales 
  laeves, 
  

   convexi, 
  cseteri 
  minus 
  convexi, 
  sutura 
  profunda 
  sejuncti 
  ; 
  anfr. 
  

   superiores 
  costis 
  obliquis 
  16-18 
  instructi, 
  liris 
  tenuibus 
  spiralibus 
  

   circiter 
  6 
  cincti, 
  liris 
  in 
  anfr. 
  anterioribus 
  2-3 
  sensim 
  evanescentibus 
  ; 
  

   anfractus 
  ultimus 
  Isevis, 
  circa 
  basim 
  striis 
  paucis 
  sculptus, 
  zonis 
  tribus 
  

   interruptis 
  pallide 
  fuscis 
  ornatus, 
  infra 
  suturam 
  spiraliter 
  striatus, 
  

   lineis 
  incrementi 
  tenuibus 
  sculptus 
  ; 
  apertura 
  parva, 
  ovalis, 
  albida 
  ; 
  

   labrum 
  extra 
  incrassatum, 
  album, 
  intus 
  denticulis 
  9-10 
  vix 
  conspicuis 
  

   instructum 
  ; 
  columella 
  arcuata, 
  callo 
  albo, 
  superrie 
  tenui 
  unidenticu- 
  

   lato, 
  antice 
  incrassato, 
  induta. 
  Long. 
  13, 
  diam. 
  5-5 
  mm. 
  ; 
  apertura 
  

   cum 
  labro 
  6 
  mm. 
  longa, 
  intus 
  2'5 
  lata. 
  

  

  Hab. 
  — 
  Ofi^ 
  Margaret 
  Beaches, 
  in 
  100 
  fathoms. 
  One 
  specimen. 
  

  

  A 
  slender 
  form 
  of 
  Nassa 
  with 
  a 
  small 
  aperture 
  and 
  long 
  spire. 
  

   About 
  three 
  and 
  a 
  half 
  of 
  the 
  upper 
  whorls 
  are 
  prettily 
  sculptured. 
  

  

  