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  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  highly 
  polished 
  surface 
  of 
  the 
  shell 
  in 
  Halia 
  I 
  should 
  conclude 
  that 
  

   its 
  voluminous 
  foot 
  could 
  enclose 
  and 
  cover 
  the 
  shell, 
  as 
  in 
  Ancilla, 
  

   Ebuma, 
  or 
  Cyprcea, 
  and, 
  to 
  a 
  certain 
  extent, 
  as 
  in 
  Natica 
  (Jeffreys)." 
  

  

  YoLUTOMiTEA 
  Gecenlandica 
  (Bcck), 
  Moller. 
  

  

  Mitra 
  Grcenlandica 
  (Beck), 
  Moller, 
  Index 
  Moll. 
  Groenlandioe, 
  p. 
  15; 
  

   Kobelt, 
  Icon. 
  Europ. 
  Meeresconch., 
  ii, 
  p. 
  4. 
  

  

  "Porcupine" 
  Expedition, 
  1869, 
  Stations 
  23« 
  (J. 
  T. 
  Marshall), 
  65 
  

   (Brit. 
  Mus.), 
  74 
  (J. 
  T. 
  Marshall 
  and 
  Brit. 
  Mus.). 
  

  

  Distribution. 
  — 
  JS'orthern 
  and 
  Arctic 
  seas. 
  

  

  MiTEA 
  BICONICA, 
  U.Sp. 
  

  

  Shell 
  elongate, 
  pale 
  yellow 
  (dead), 
  rather 
  solid 
  ; 
  whorls 
  6-7, 
  rather 
  

   flattened, 
  with 
  a 
  well-marked 
  suture 
  ; 
  protoconch 
  smooth 
  ; 
  the 
  residue 
  

   of 
  the 
  shell 
  is 
  marked 
  by 
  numerous, 
  densely 
  set 
  spiral 
  strise, 
  crossed 
  

   by 
  a 
  few 
  obsolete 
  longitudinal 
  ribs 
  ; 
  mouth 
  elongate, 
  narrow; 
  columella 
  

   with 
  two 
  folds 
  ; 
  outer 
  margin 
  sulcate 
  within. 
  Alt. 
  9, 
  lat. 
  3 
  mm. 
  

  

  "Porcupine" 
  Expedition, 
  1870, 
  Station 
  24. 
  

  

  Somewhat 
  resembling 
  an 
  elongate 
  form 
  of 
  the 
  well-known 
  

   Pleurotomoid, 
  Mangilia 
  septangular 
  is. 
  

  

  MiTEA 
  COLTJMBELLAEIA, 
  Scacchi. 
  

  

  Mitra 
  columbellaria, 
  Scacchi, 
  Cat., 
  p. 
  10, 
  figs. 
  12, 
  13 
  ; 
  Kobelt, 
  Icon. 
  

   Europ. 
  Meeresconch., 
  ii, 
  p. 
  56. 
  

   "Porcupine" 
  Expedition, 
  1870, 
  Adventure 
  Bank, 
  92 
  fathoms; 
  

   Benzert 
  Road, 
  40-65 
  fathoms; 
  Stations 
  50, 
  56. 
  

  

  MiTEA 
  coENicuLA 
  (Liune). 
  

  

  Valuta 
  coniicula, 
  Linne, 
  Syst. 
  Nat., 
  12th 
  ed., 
  p. 
  1191. 
  

  

  Mitra 
  cornicula, 
  Linne: 
  Kobelt, 
  Icon. 
  Europ. 
  Meeresconch., 
  ii, 
  p. 
  50. 
  

  

  "Porcupine" 
  Expedition, 
  1870, 
  Station 
  50 
  (one 
  immature 
  shell). 
  

  

  Distribution. 
  — 
  Mediterranean 
  Sea, 
  and 
  also 
  in 
  the 
  Atlantic. 
  

  

  Mitra 
  ebenus, 
  Lamarck. 
  

  

  Mitra 
  ebenus, 
  Lamarck, 
  Ann. 
  du 
  Mus., 
  xvii, 
  jS'o. 
  58; 
  Kobelt, 
  Icon. 
  

   Europ. 
  Meeresconch., 
  ii, 
  p. 
  47. 
  

   "Porcupine" 
  Expedition, 
  1870, 
  Station 
  58 
  (Brit. 
  Mus.). 
  

   Distribution. 
  — 
  Yarious 
  Mediterranean 
  localities. 
  

  

  