﻿NO. 
  1139. 
  DEEP-WATER 
  MOLLUSCA—VEBRILL 
  AND 
  BUSH. 
  847 
  

  

  The 
  nortliern 
  specimens 
  {L. 
  profnndlcola) 
  formerly 
  referred 
  doubt- 
  

   fully 
  to 
  this 
  species 
  prove 
  to 
  be 
  distinct. 
  The 
  single 
  specimen 
  now 
  

   included 
  agrees 
  well 
  with 
  a 
  specimen 
  of 
  the 
  fossil 
  form 
  from 
  Europe. 
  

  

  LIMOPSIS 
  PROFUNDICOLA, 
  new 
  species. 
  

  

  (Plates 
  LXXV, 
  fig. 
  4; 
  LXXXIII, 
  fig. 
  4.) 
  

  

  Limopsis 
  anriia, 
  variety 
  ( 
  if) 
  "N'errill, 
  Trans. 
  Couii. 
  Acad., 
  VI, 
  j). 
  440, 
  1885. 
  

  

  Comparatively 
  few 
  specimens, 
  at 
  ten 
  stations, 
  between 
  IS", 
  lat. 
  41° 
  7', 
  

   W. 
  long. 
  0:)O 
  20' 
  30", 
  and 
  N. 
  lat. 
  SG'^ 
  47', 
  W. 
  long. 
  73° 
  9' 
  30", 
  in 
  1,525 
  to 
  

   1,859 
  fathoms, 
  1884-1886. 
  

  

  Family 
  MYTILID.E. 
  

  

  CRENELLA 
  FRAGILIS 
  Verrill. 
  

  

  (Plate 
  LXXXIII, 
  figs. 
  1,2.) 
  

  

  Crenclla 
  fragiHs 
  Verrill, 
  Trans, 
  Conn. 
  Acad., 
  VI, 
  p. 
  444, 
  t8«5. 
  — 
  Dall, 
  Bnll. 
  U. 
  S. 
  

   Nat. 
  Mns., 
  No. 
  37, 
  p. 
  40, 
  1889. 
  

  

  One 
  valve 
  and 
  a 
  fragment, 
  station 
  2205, 
  N, 
  lat. 
  37° 
  7' 
  40", 
  W. 
  long. 
  

   74° 
  35' 
  40", 
  in 
  70 
  fathoms, 
  1884. 
  

  

  GLOMID.E, 
  new 
  family. 
  

  

  (ilomintr 
  Vkrrill 
  and 
  BusH, 
  Amer. 
  .lourn. 
  Sci., 
  Ill, 
  pp. 
  53, 
  .5!t, 
  January, 
  1897. 
  

  

  Shell 
  short, 
  roundish 
  at 
  both 
  ends. 
  Hinge-plate 
  with 
  a 
  row 
  of 
  trans- 
  

   verse 
  teeth 
  each 
  side 
  of 
  the 
  middle. 
  Ligament 
  thick, 
  elongated, 
  

   attached 
  for 
  most 
  of 
  its 
  length 
  to 
  the 
  inner 
  surface 
  of 
  the 
  posterior 
  

   hinge-plate 
  and 
  running 
  forward 
  in 
  a 
  narrow 
  groove 
  beneath 
  the 
  

   beaks, 
  so 
  that 
  its 
  anterior 
  portion 
  is 
  external 
  and 
  its 
  thickened 
  pos- 
  

   terior 
  portion 
  is 
  partly 
  internal. 
  No 
  pallial 
  sinus. 
  Animal 
  not 
  known. 
  

  

  This 
  group 
  includes, 
  so 
  far 
  as 
  known, 
  only 
  the 
  genus 
  Glomus 
  Jef- 
  

   freys, 
  wliich 
  has 
  been 
  referred 
  by 
  several 
  writers 
  to 
  the 
  Arcida% 
  and 
  by 
  

   others 
  to 
  the 
  Ledid;e, 
  from 
  both 
  of 
  which 
  it 
  differs 
  widely. 
  Its 
  rela- 
  

   tions 
  to 
  the 
  I^Tucnlida^ 
  are 
  somewhat 
  nncertain, 
  owing 
  to 
  our 
  ignorance 
  

   of 
  the 
  soft 
  parts. 
  In 
  the 
  form 
  and 
  position 
  of 
  the 
  ligament 
  it 
  differs 
  

   entirely 
  from 
  all 
  other 
  genera 
  of 
  Nucnlida' 
  and 
  Ledidic. 
  

  

  A 
  more 
  mature 
  consideration 
  of 
  this 
  group, 
  since 
  the 
  publication 
  of 
  

   our 
  former 
  article, 
  leads 
  us 
  to 
  consider 
  it 
  as 
  a 
  family 
  distinct 
  from 
  

   Nuculidic. 
  

  

  GLOMUS 
  Jeffreys. 
  

  

  Glomus 
  Jeffreys, 
  Annals 
  Mag. 
  Nat. 
  Hist., 
  p. 
  433, 
  November, 
  1876. 
  — 
  Verrill 
  and 
  

   Bush, 
  Amer. 
  Journ. 
  Sol., 
  Ill, 
  pp. 
  53, 
  59, 
  January, 
  1897. 
  

  

  Type. 
  — 
  Glomus 
  nltens 
  Jeffreys. 
  

  

  Shell 
  thin, 
  smooth, 
  subequilateral, 
  rounded 
  at 
  both 
  ends, 
  with 
  the 
  

   beaks 
  turned 
  forward. 
  No 
  lunule 
  or 
  escutcheon. 
  Hinge 
  Avith 
  two 
  

   series 
  of 
  obliquely 
  transverse 
  teeth 
  ; 
  a 
  small 
  lateral 
  tooth 
  may 
  be 
  i)reseut. 
  

  

  