﻿\l 
  W 
  S 
  OBB 
  S 
  I 
  AT! 
  Ml 
  si 
  a 
  M 
  

  

  ni 
  Inutul 
  ;i 
  w.is 
  attached 
  t<> 
  stems 
  of 
  Diplogm 
  j»t 
  us 
  : 
  the 
  

  

  Iter 
  has 
  noticed 
  BeveraJ 
  cases 
  of 
  apparent 
  attachmenl 
  of 
  valves 
  

  

  e 
  r 
  d 
  l 
  a 
  to 
  rhabdosomes 
  of 
  graptolitea 
  in 
  the 
  shales 
  of 
  

  

  Moreno. 
  Farther, 
  the 
  accumulation 
  of 
  these 
  shells 
  in 
  small 
  

  

  mnsi 
  be 
  considered 
  as 
  indicative 
  of 
  a 
  preceding 
  drifting 
  f 
  

  

  this 
  slowly 
  settling 
  organic 
  detritus. 
  

  

  PBLTOYPO-DA 
  

  

  Technophorus 
  cancel 
  1 
  at 
  us 
  sp. 
  n. 
  (see 
  pi. 
  1. 
  fig. 
  

  

  Shell 
  small, 
  moderately 
  convex, 
  elongate, 
  length 
  twice 
  the 
  

   night, 
  greatest 
  length 
  in 
  about 
  the 
  middle, 
  subalate 
  posteriorly; 
  

   cardinal 
  margin 
  short 
  and 
  straight, 
  anteriorly 
  longer, 
  slightly 
  

   concave 
  posteriorly; 
  anterior 
  end 
  rounded, 
  ventral 
  margin 
  first 
  

   convex, 
  then 
  gently 
  concave, 
  the 
  posterobasal 
  part 
  produced, 
  

   the 
  posterior 
  margin 
  slightly 
  concave, 
  vertical; 
  postero-cardinal 
  

   angle 
  slightly 
  truncate; 
  Leak 
  sub-anterior, 
  of 
  moderate 
  size 
  and 
  

   rity, 
  little 
  elevated 
  above 
  the 
  hinge 
  line. 
  

   Surface 
  uniformly 
  convex 
  in 
  the 
  middle 
  and 
  anterior 
  parts, 
  

   with 
  a 
  broad, 
  shallow 
  depression 
  extending 
  from 
  the 
  beak 
  to 
  the 
  

   rtero-ventral 
  margin; 
  post-cardinal 
  slope 
  with 
  two 
  Btraight, 
  

   diverging, 
  strongly 
  projecting 
  angular 
  ridges 
  or 
  folds, 
  which 
  ex- 
  

   tend 
  to 
  the 
  postero-ventral 
  angle, 
  and 
  are 
  separated 
  by 
  a 
  rounded, 
  

   centrally 
  deepening 
  sulcus; 
  posterior 
  wing 
  unversed 
  by 
  another 
  

   oblique 
  and 
  shallower 
  depression 
  and 
  posterior 
  extremity 
  slightly 
  

   < 
  d. 
  Surface 
  marked 
  by 
  equal 
  filiform, 
  concentric 
  lines, 
  which 
  

   "" 
  tbe 
  anterior 
  and 
  middle 
  parts 
  pass 
  parallel 
  to 
  the 
  ventral 
  

   margin, 
  between 
  the 
  post-cardinal 
  ridges 
  turn 
  upward, 
  and 
  on 
  

   the 
  posh-rim- 
  wing 
  swing 
  obliquely 
  forward; 
  these 
  are 
  crossed 
  

   " 
  M 
  ,,M 
  ' 
  anterior 
  and 
  middle 
  puns 
  by 
  another 
  system 
  of 
  vertical, 
  

   """■ 
  *1 
  arranged 
  thread-like 
  lines, 
  which 
  in 
  smaller 
  sped- 
  

  

  m, 
  '" 
  v 
  appear 
  only 
  between 
  the 
  concentric 
  lines, 
  in 
  larger 
  speci- 
  

   "" 
  ontinuous 
  and 
  more 
  prominent 
  than 
  the 
  latter. 
  

  

  1 
  !i 
  a 
  deep, 
  backward 
  cun 
  ing 
  impression 
  in 
  front 
  of 
  the 
  

  

  beak 
  and 
  a 
  corresponding 
  shallower, 
  forward 
  curving 
  impression 
  

  

  