﻿ACADEMY 
  OF 
  SCIENCES. 
  253 
  

  

  behind 
  it. 
  Whorls 
  5%, 
  aperture 
  half 
  as 
  Ion": 
  as 
  the 
  shell 
  ; 
  internally 
  polished 
  ; 
  

   outer 
  edge 
  somewhat 
  thickened 
  ; 
  inner 
  lip 
  callous 
  ; 
  collumella 
  strongly 
  twisted 
  ; 
  

   canal 
  short, 
  rather 
  wide. 
  Lon. 
  1.33 
  inches, 
  lat. 
  0.75 
  inches; 
  dcfl. 
  55'^. 
  This 
  

   species 
  is 
  much 
  less 
  inflated, 
  and 
  proportionally 
  longer 
  than 
  B. 
  Dalei, 
  Sby., 
  

   which 
  is 
  nearly 
  smooth, 
  and 
  has 
  not 
  the 
  deeply 
  channelled 
  suture. 
  S. 
  striata, 
  

   Jeffreys, 
  (if 
  this 
  be 
  a 
  true 
  Buccinopsis, 
  which 
  I 
  doubt) 
  has 
  a 
  straight 
  columella, 
  

   and 
  proportionally 
  larger 
  body 
  whorl 
  ; 
  the 
  present 
  species 
  is 
  a 
  neater 
  and 
  more 
  

   fusiform 
  shell, 
  with 
  much 
  finer 
  sculpture. 
  

  

  Captain 
  Smith 
  obtained 
  but 
  one 
  tolerably 
  fresh 
  adult 
  specimen, 
  of 
  this 
  in- 
  

   teresting 
  shell, 
  on 
  the 
  beach 
  at 
  Cape 
  Espenberg. 
  , 
  ^ 
  

  

  Volutopsis 
  attenuata, 
  n. 
  s. 
  

  

  Shell 
  solid, 
  pinkish 
  white, 
  much 
  attenuated 
  before 
  and 
  behind 
  ; 
  spire 
  one-quar- 
  

   ter 
  shorter 
  than 
  the 
  aperture. 
  Whorls 
  six, 
  apex 
  mammillated. 
  Posterior 
  

   surface 
  of 
  the 
  whorls 
  flattened 
  toward 
  the 
  suture, 
  where 
  they 
  are 
  somewhat 
  

   wrinkled 
  and 
  appressed. 
  Surface 
  of 
  the 
  whorls 
  completely 
  covered 
  with 
  fine, 
  

   even, 
  spiral 
  lines. 
  Aperture 
  long 
  and 
  narrow, 
  a 
  thickened 
  callus 
  on 
  the 
  inner 
  

   lip, 
  and 
  the 
  outer 
  lip 
  slightly 
  reflected. 
  Canal 
  long, 
  nearly 
  straight, 
  rather 
  

   narrow. 
  Lon. 
  shell, 
  2.33 
  inches, 
  of 
  aperture 
  1.4 
  inches, 
  lat. 
  shell 
  1.0, 
  of 
  

   aperture 
  0.5 
  inches 
  ; 
  defl. 
  40°. 
  

  

  This 
  very 
  interesting 
  species 
  is 
  at 
  once 
  distinguished 
  from 
  any 
  of 
  the 
  de- 
  

   scribed 
  species, 
  by 
  the 
  spiral 
  sculpture, 
  and 
  otherwise 
  by 
  its 
  elongated 
  and 
  

   slender 
  form. 
  V. 
  regularis, 
  Dall, 
  from 
  the 
  Aleutians, 
  is 
  a 
  much 
  more 
  robust 
  

   shell, 
  and 
  of 
  the 
  same 
  color, 
  but 
  quite 
  smooth. 
  One 
  specimen, 
  in 
  good 
  order, 
  

   was 
  all 
  that 
  Captain 
  Smith 
  obtained. 
  It 
  has 
  also 
  been 
  obtained 
  at 
  Cook's 
  Inlet. 
  

  

  85*- 
  Pleurotoma 
  vinosa, 
  n. 
  s. 
  

  

  This 
  shell 
  is 
  closely 
  allied 
  to 
  P. 
  {Surcula) 
  perversa, 
  of 
  Gabb, 
  from 
  the 
  -n/ 
  

   Straits 
  of 
  Fuca 
  and 
  Catalina 
  Island, 
  but 
  dififers 
  in 
  the 
  following 
  particulars: 
  

   P. 
  perversa 
  has 
  a 
  light 
  olivaceous 
  epidermis, 
  which 
  gives 
  a 
  livid 
  appearance 
  

   to 
  the 
  light 
  reddish 
  brown 
  of 
  the 
  whorls 
  outside 
  ; 
  and 
  a 
  broad, 
  white 
  band, 
  

   with 
  ill-defined 
  edges, 
  passes 
  round 
  the 
  periphery 
  of 
  the 
  shell, 
  just 
  covered 
  by 
  

   the 
  suture 
  in 
  the 
  upper 
  whorls. 
  The 
  columella, 
  end 
  of 
  the 
  canal, 
  and 
  tip 
  of 
  

   the 
  shell, 
  are 
  also 
  white. 
  The 
  present 
  form 
  is 
  of 
  a 
  uniform 
  deep 
  winebrown, 
  or 
  

   claret 
  color 
  ; 
  is 
  shorter 
  and 
  much 
  less 
  slender, 
  with 
  a 
  shorter 
  canal 
  and 
  pro- 
  

   portionately 
  much 
  larger 
  aperture. 
  Both 
  shells 
  are 
  reversed, 
  andcovered 
  with 
  fine, 
  

   somewhat 
  irregular 
  spiral 
  lines, 
  not 
  mentioned 
  by 
  Gabb 
  in 
  his 
  diagnosis. 
  My 
  

   specimens 
  were 
  obtained 
  in 
  Kyska 
  Harbor, 
  Great 
  Kyska 
  Island, 
  Aleutians. 
  

   My 
  largest 
  shell 
  has 
  nine 
  whorls, 
  and 
  is 
  a 
  quarter 
  of 
  an 
  inch 
  shorter, 
  and 
  one- 
  

   fifth 
  of 
  an 
  inch 
  broader, 
  than 
  a 
  specimen 
  of 
  P. 
  perversa 
  of 
  exactly 
  the 
  same 
  

   number 
  of 
  whorls. 
  It 
  probably 
  belongs 
  to 
  the 
  Aleutian 
  fauna, 
  but 
  may 
  go 
  

   northward 
  to 
  the 
  Straits. 
  

  

  