﻿DEEP-WATER 
  MOLLUSC 
  A— 
  VERRILL 
  AND 
  BUSH. 
  783 
  

  

  which 
  appear 
  in 
  some 
  i^laces 
  to 
  extend 
  beneath 
  the 
  upper 
  edge 
  of 
  the 
  

   ridges; 
  on 
  the 
  umbos 
  and 
  posterior 
  rostrum 
  these 
  ridges 
  and 
  grooves 
  

   become 
  feeble 
  and 
  irregular, 
  like 
  lines 
  of 
  growth. 
  Internally 
  the 
  sur- 
  

   face 
  is 
  white 
  and 
  smooth, 
  with 
  the 
  muscular 
  scars 
  rather 
  strongly 
  

   marked. 
  

  

  Tlie 
  hinge-margin 
  is 
  rather 
  thick; 
  in 
  the 
  right 
  valve 
  there 
  are 
  two 
  

   strong, 
  prominent, 
  curved, 
  cardinal 
  teeth, 
  separated 
  by 
  a 
  large, 
  some- 
  

   what 
  oblique 
  notch 
  which 
  extends 
  upward 
  into 
  the 
  beak; 
  the 
  posterior 
  

   tooth 
  is 
  the 
  narrower 
  and 
  more 
  prominent, 
  with 
  the 
  tip 
  curved 
  forward 
  

   and 
  upward; 
  the 
  anterior 
  tooth 
  is 
  connected, 
  Just 
  in 
  front 
  of 
  the 
  beak, 
  

   by 
  a 
  bridge-like 
  extension 
  to 
  the 
  external 
  margin, 
  leaving 
  between 
  the 
  

   tooth 
  and 
  the 
  margin 
  a 
  deep 
  submarginal 
  groove; 
  the 
  inner 
  edge 
  of 
  

   the 
  hinge-margin 
  is 
  a 
  little 
  thickened 
  to 
  form 
  a 
  ridge 
  continuous 
  with 
  

   the 
  anterior 
  tooth. 
  In 
  the 
  left 
  valve 
  there 
  is 
  a 
  distinct 
  notch 
  under 
  

   the 
  beak 
  for 
  the 
  cartilage 
  or 
  resilium; 
  in 
  front 
  of 
  this 
  is 
  a 
  prominent, 
  

   tooth-like 
  thickening 
  of 
  the 
  margin 
  of 
  the 
  shell, 
  the 
  proximal 
  end 
  of 
  

   which 
  becomes 
  tooth 
  like, 
  but 
  is 
  continuous 
  with 
  the 
  rest 
  of 
  the 
  hinge- 
  

   margin; 
  behind 
  the 
  notch 
  there 
  is 
  no 
  tooth 
  and 
  the 
  margin 
  is 
  only 
  a 
  

   little 
  thickened, 
  without 
  any 
  special 
  prominence. 
  

  

  Length, 
  about 
  2 
  mm.; 
  height, 
  1.4 
  mm. 
  

  

  Two 
  valves, 
  station 
  2307, 
  off 
  Cape 
  Hatteras, 
  Xorth 
  Carolina, 
  in 
  43 
  

   fathoms, 
  1884. 
  

  

  TELLIMYA 
  FERRUGINOSA 
  (Montagu). 
  

  

  (Plate 
  XC, 
  figs. 
  7, 
  8.) 
  

  

  Tellimya 
  ferrmjinosa 
  H. 
  and 
  A. 
  Adams, 
  Genera 
  Recent 
  Moll., 
  II, 
  p. 
  479, 
  1858. 
  

   Montacuta 
  ferruginosa 
  5v.vvRVuYS, 
  British 
  Conchology, 
  II, 
  p. 
  210, 
  1863; 
  Y, 
  p. 
  178, 
  

  

  pi. 
  XXXI, 
  fig. 
  9, 
  1869. 
  

   Tellimya 
  ferriigiiiosa 
  G. 
  0. 
  Sars, 
  Mollusca 
  Reg. 
  Arcticse 
  Norvegia", 
  p. 
  70, 
  pi. 
  20, 
  

  

  figs. 
  1, 
  a-e, 
  1878.— 
  Verrill, 
  Trans. 
  Conn. 
  Acad., 
  VI, 
  22.5, 
  pi. 
  xxx, 
  fig. 
  13, 
  1884. 
  

   Montacuta 
  ferruginosa 
  P"'isciieh, 
  Manuel 
  de 
  Conchyliologie, 
  p. 
  1027, 
  fig. 
  775, 
  1887. 
  

   Tellimya 
  ferrmjinosa 
  Dall, 
  Bull. 
  U. 
  S. 
  Nat. 
  Mns., 
  Nc 
  37, 
  p. 
  50, 
  pi. 
  xlv, 
  fig. 
  13, 
  1889. 
  

  

  A 
  few 
  specimens 
  were 
  found 
  at 
  low-water 
  at 
  Woods 
  Hole, 
  Massa- 
  

   chusetts 
  (Gut 
  of 
  Canso), 
  and 
  Gutters 
  of 
  Naushon 
  Island, 
  1882-83. 
  The 
  

   figure 
  of 
  the 
  living 
  animal 
  published 
  by 
  Verrill 
  in 
  1884 
  has 
  been 
  copied 
  

   by 
  Dall, 
  Fischer, 
  and 
  others. 
  We 
  now 
  give 
  additional 
  ones. 
  

  

  KELLIOPSIS, 
  new 
  genus. 
  

  

  Type. 
  — 
  Montacuta 
  elevata 
  Stimpsou. 
  

  

  The 
  shell, 
  in 
  size 
  and 
  form, 
  resembles 
  Kellia 
  and 
  Montacuta. 
  In 
  

   both 
  valves 
  there 
  is 
  a 
  small, 
  ijromiuent, 
  anterior 
  tooth 
  and 
  a 
  low, 
  

   elongated, 
  thickened 
  posterior 
  ridge, 
  scarcely 
  amounting 
  to 
  a 
  tooth. 
  

   The 
  resilium 
  is 
  large 
  and 
  is 
  attached 
  to 
  an 
  elongated, 
  oblique 
  excava- 
  

   tion 
  on 
  the 
  proximal 
  edge 
  of 
  the 
  posterior 
  tooth-like 
  ridge, 
  and 
  also 
  to 
  

   a 
  triangular 
  pit 
  beneath 
  the 
  beak; 
  it 
  bears 
  a 
  large, 
  elongated, 
  curved 
  

   ossicle. 
  Soft 
  parts 
  not 
  observed. 
  

  

  