﻿NO. 
  1139. 
  DEEP- 
  WA 
  TEB 
  MOLL 
  USCA— 
  FERBILL 
  AND 
  B 
  USE. 
  821 
  

  

  region, 
  it 
  <Iifters 
  in 
  its 
  mucli 
  smaller 
  size, 
  nuicli 
  less 
  iridescent 
  interior 
  

   straighter 
  postero-dorsal 
  margin, 
  less 
  upturned 
  rostrum, 
  and 
  narrow 
  

   or 
  more 
  accuminate, 
  posterior 
  lialf 
  of 
  the 
  sliell. 
  The 
  hinge 
  also 
  differs 
  

   in 
  several 
  respects. 
  

  

  KENNERLIA 
  BREVIS, 
  new 
  species. 
  

   (Plate 
  LXXXVIII, 
  ^gs. 
  7, 
  a, 
  h.) 
  

  

  Kennerlia 
  glacialis 
  Verrill, 
  Notice 
  of 
  Recent 
  Add. 
  to 
  Mar. 
  Invert., 
  Pt. 
  2 
  Proc. 
  

   U. 
  S. 
  Nat. 
  Mas., 
  Ill, 
  p. 
  397, 
  1881; 
  Trans. 
  Coun. 
  Acad., 
  V, 
  p. 
  .567, 
  1882; 
  YI, 
  

   p. 
  277, 
  1884.— 
  Dall, 
  Btill. 
  U. 
  S. 
  Nat. 
  Mns.. 
  No. 
  37, 
  p. 
  68, 
  1889 
  (in 
  partj. 
  

  

  Shell 
  short, 
  subhmate, 
  very 
  inequilateral, 
  obtuse 
  at 
  both 
  ends, 
  slightly 
  

   narrowed 
  anteriorly. 
  The 
  antero-dorsal 
  margin 
  is 
  short 
  and 
  slopes 
  

   rather 
  rapidly 
  to 
  the 
  anterior 
  end, 
  where 
  it 
  forms 
  au 
  obtuse 
  angle 
  with 
  

   the 
  ventral 
  margin 
  which 
  is 
  broadly 
  and 
  nearly 
  evenly 
  rounded, 
  and 
  

   passes 
  into 
  the 
  rounded 
  posterior 
  margin 
  without 
  angulation, 
  but 
  some- 
  

   times 
  with 
  a 
  slightly 
  sinuous 
  curve 
  below; 
  there 
  is 
  also, 
  sometimes, 
  a 
  

   very 
  slight 
  sinuosity 
  anteriorly; 
  the 
  postero-dorsal 
  margin 
  is 
  nearly 
  

   straig'ht. 
  The 
  left 
  valve 
  is 
  rather 
  couvex, 
  moderately 
  thick, 
  nearly 
  

   smooth, 
  with 
  a 
  distinct, 
  narrow 
  radial 
  ridge 
  running- 
  from 
  the 
  beak 
  to 
  

   the 
  posterior 
  end. 
  The 
  right 
  valve 
  is 
  smaller, 
  concave 
  or 
  nearly 
  flat, 
  

   lunate, 
  widest 
  behind 
  the 
  middle, 
  regularly 
  curved 
  veutrally 
  or 
  faintly 
  

   sinuate 
  anteriorly; 
  its 
  surface 
  is 
  marked 
  by 
  lines 
  of 
  growth 
  and 
  crossed 
  

   by 
  radial 
  grooves, 
  of 
  which 
  about 
  ten 
  are 
  very 
  distinct, 
  while 
  many 
  

   others, 
  much 
  finer, 
  can 
  be 
  seen 
  with 
  a 
  lens. 
  lu 
  the 
  right 
  valve 
  the 
  

   hinge 
  consists 
  of 
  two 
  small, 
  divergent 
  teeth, 
  both 
  of 
  which 
  are 
  directed 
  

   posteriorly. 
  The 
  rather 
  thiu, 
  elongated 
  posterior 
  one, 
  in 
  a 
  profile 
  view, 
  

   is 
  obtusely 
  triangular, 
  its 
  highest 
  point 
  distal 
  to 
  the 
  middle; 
  the 
  slender 
  

   resilhim 
  is 
  attached 
  to 
  this, 
  nearly 
  the 
  whole 
  length 
  of 
  its 
  anterior 
  side, 
  

   and 
  carries 
  a 
  long, 
  narrow 
  ossicle. 
  The 
  cardinal 
  tooth 
  directly 
  under 
  the 
  

   beak, 
  is 
  much 
  shorter 
  and 
  somewhat 
  thicker, 
  with 
  its 
  highest 
  point 
  

   near 
  the 
  proximal 
  end 
  which 
  is 
  close 
  to 
  the 
  dorsal 
  margin. 
  There 
  is 
  

   also 
  a 
  slightly 
  elevated, 
  rather 
  indistinct, 
  anterior 
  submarginal 
  ridge, 
  

   parallel 
  with 
  the 
  margin, 
  which 
  supports 
  a 
  slender 
  ligamental 
  groove. 
  

   In 
  the 
  left 
  valve 
  the 
  hinge 
  consists 
  of 
  a 
  submarginal, 
  thickened, 
  

   blunt 
  anterior 
  tooth, 
  running 
  forward 
  subparallel 
  with 
  the 
  margin, 
  and 
  

   a 
  posterior 
  submarginal 
  thickening 
  or 
  ridge 
  having 
  the 
  resilium 
  attached 
  

   to 
  its 
  anterior 
  side; 
  the 
  V-shaped 
  space 
  is 
  relatively 
  very 
  wide 
  and 
  is 
  

   not 
  divided 
  by 
  any 
  distinct 
  intermediate 
  ridges, 
  such 
  as 
  occur 
  in 
  typical 
  

   Fnndora. 
  The 
  resilium 
  appears 
  to 
  be 
  simple, 
  not 
  divided 
  in 
  a 
  V-shaped 
  

   form 
  as 
  in 
  the 
  latter 
  genus. 
  

  

  Length 
  of 
  one 
  of 
  the 
  largest 
  specimens, 
  11.5 
  mm.; 
  height, 
  7 
  mm.; 
  

   thickness, 
  3 
  mm. 
  

  

  Found 
  in 
  small 
  numbers 
  at 
  about 
  ten 
  stations 
  between 
  N. 
  lat. 
  400 
  15' 
  

   30'', 
  W. 
  long. 
  70^ 
  27', 
  and 
  N. 
  lat. 
  35° 
  10/ 
  40", 
  W. 
  long. 
  75° 
  6' 
  10", 
  in 
  ~)^ 
  

   to 
  100 
  fathoms, 
  1880-1880. 
  

  

  This 
  species, 
  which 
  is 
  southern 
  in 
  its 
  range, 
  is 
  closely 
  related 
  to 
  the 
  

  

  