﻿800 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  CUSPIDARIA 
  ROSTRATA 
  (Spengler) 
  Dall. 
  

  

  (Plate 
  LXXII, 
  fig. 
  G.) 
  

  

  Newm 
  rostraia 
  Vekrill, 
  Trans. 
  Conn. 
  Acad., 
  V, 
  p. 
  562, 
  pi. 
  lviii, 
  fig. 
  39, 
  1882; 
  VI, 
  

   p. 
  277, 
  1884; 
  Expl. 
  Albatross, 
  Report 
  U. 
  S. 
  Com. 
  Fish 
  and 
  Fisheries 
  for 
  1883, 
  

   p. 
  574, 
  1885. 
  — 
  Smith, 
  E. 
  A., 
  Report 
  Voy. 
  Challenger, 
  Zoijl. 
  Lamellibranchiata, 
  

   XII, 
  p. 
  35, 
  1885. 
  

  

  Cuspidaria 
  rostrata 
  Dall, 
  Bull. 
  Mus. 
  Comp. 
  Zoul., 
  XII, 
  p. 
  294, 
  1886; 
  XVIII, 
  p. 
  444, 
  

   1889 
  ; 
  Bull. 
  U. 
  S. 
  Nat. 
  Mus., 
  No. 
  37, 
  p. 
  66, 
  1889.— 
  Locard, 
  Campagnedu 
  Caudaii, 
  

   Annales 
  de 
  I'Universite 
  de 
  Lyon, 
  p. 
  177, 
  1896. 
  * 
  

  

  This 
  species 
  was 
  obtained 
  at 
  about 
  fifteen 
  stations 
  between 
  K. 
  lat. 
  

   40° 
  G' 
  50", 
  W. 
  long. 
  70° 
  34' 
  15", 
  and 
  K 
  lat. 
  38° 
  31', 
  W. 
  long. 
  73° 
  21', 
  

   in 
  05 
  to 
  156 
  fathoms. 
  South 
  to 
  Barbados 
  in 
  05 
  to 
  1,039 
  fathoms. 
  — 
  Dall. 
  

  

  CUSPIDARIA 
  GLACIALIS 
  (G. 
  O. 
  Sars) 
  Dall. 
  

   (Plates 
  LXXI, 
  fig. 
  9; 
  LXXIII, 
  fig. 
  5; 
  LXXV, 
  fig. 
  9.) 
  

  

  Newra 
  glacialis 
  G. 
  O. 
  Sars, 
  Mollusca 
  Reg. 
  Arcticie 
  Norvegia;, 
  p. 
  88, 
  pi. 
  6, 
  figs. 
  

   8, 
  a-c, 
  1878.— 
  Verrill, 
  Trans. 
  Conn. 
  Acad., 
  V, 
  p. 
  562, 
  pi. 
  xliv, 
  figs. 
  10, 
  a-b, 
  

   1882; 
  VI, 
  p. 
  277, 
  1884; 
  Expl. 
  Albatross, 
  Eoport 
  U. 
  S. 
  Com. 
  Fish 
  and 
  Fisheries 
  

   for 
  1883, 
  p. 
  574, 
  1885.— 
  Smith, 
  E. 
  A., 
  Eeport 
  Voy. 
  Challenger, 
  Zool. 
  Lamelli- 
  

   branchiata, 
  XIII, 
  p. 
  35, 
  1885. 
  

  

  Cuspidaria 
  glacialis 
  Dall, 
  Bull. 
  Mus. 
  Comp. 
  Zool., 
  XII, 
  pp. 
  294, 
  303, 
  1886; 
  Bull. 
  

   U. 
  S. 
  Nat. 
  Mu 
  , 
  No. 
  37, 
  p. 
  66, 
  1889. 
  

  

  Cuspidaria 
  arctica 
  var. 
  glacialis 
  Dall, 
  Bull. 
  Mus. 
  Comp. 
  Zool., 
  XVIII, 
  p. 
  14 
  1, 
  

   1889; 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  XII, 
  p. 
  280, 
  1889. 
  

  

  Cuspidaria 
  glacialis 
  Bush, 
  Bull. 
  Mus. 
  Comp. 
  Zoiil., 
  XXIII, 
  p. 
  226, 
  1893. 
  

  

  Not 
  Cuspidaria 
  artica 
  (hi. 
  Sars). 
  

  

  This 
  very 
  common 
  species 
  was 
  dredged 
  at 
  many 
  stations 
  from 
  ]^. 
  lat, 
  

   41° 
  26', 
  W. 
  long. 
  02° 
  10', 
  to 
  K 
  lat. 
  37° 
  8', 
  W. 
  long. 
  74° 
  33', 
  in 
  02 
  to 
  828 
  

   fathoms. 
  South 
  to 
  the 
  Grulf 
  of 
  Mexico, 
  in 
  64 
  to 
  1,407 
  fathoms. 
  — 
  Dall, 
  

  

  CUSPIDARIA 
  MEDIA, 
  new 
  species. 
  

  

  (Plates 
  LXXI, 
  figs. 
  .5, 
  6; 
  LXXIII, 
  fig. 
  6.) 
  

  

  Shell 
  of 
  moderate 
  size, 
  resembling 
  a 
  medium 
  sized 
  C. 
  glacialis 
  (Sars), 
  

   in 
  form, 
  but 
  decidedly 
  more 
  swollen, 
  with 
  the 
  rostrum 
  narrower 
  and 
  

   more 
  distinctly 
  defined 
  by 
  a 
  stronger 
  ventral 
  emargination. 
  Umbos 
  

   large, 
  prominent, 
  and 
  swollen, 
  with 
  strongly 
  incurved 
  and 
  very 
  promi- 
  

   nent 
  beaks. 
  The 
  antero-dorsal 
  margin 
  is 
  a 
  little 
  convex 
  and 
  slopes 
  

   rapidly 
  to 
  the 
  evenly 
  rounded 
  anterior 
  end; 
  the 
  ventral 
  margin 
  is 
  regu- 
  

   larly 
  curved 
  and 
  is 
  rather 
  more 
  convex 
  than 
  in 
  C. 
  f/lacialis, 
  and 
  shows 
  

   a 
  very 
  decided 
  emargination 
  at 
  the 
  base 
  of 
  the 
  rostrum; 
  the 
  postero- 
  

   dorsal 
  margin 
  is 
  nearly 
  straight 
  but 
  slopes 
  from 
  the 
  beak 
  to 
  the 
  end 
  of 
  

   the 
  rostrum 
  which 
  is 
  of 
  moderate 
  length 
  and 
  tapers 
  from 
  the 
  base 
  to 
  

   the 
  narrow, 
  subtruncated 
  end; 
  it 
  has 
  no 
  distinct 
  diagonal 
  ridge, 
  but 
  is 
  

   separated 
  from 
  the 
  body 
  of 
  the 
  shell 
  by 
  a 
  strongly 
  marked 
  depression. 
  

   The 
  surface 
  is 
  nearly 
  smooth 
  but 
  is 
  covered 
  with 
  fine 
  lines 
  of 
  growth 
  

  

  