﻿130 
  A. 
  E. 
  Verrill 
  — 
  Echinoderms 
  of 
  Northeastern 
  America. 
  

  

  Bathymetrical 
  range, 
  721 
  to 
  2021 
  fathoms. 
  Most 
  common 
  

   in 
  1200 
  to 
  1600 
  fathoms. 
  It 
  was 
  taken 
  at 
  60 
  stations, 
  between 
  

   K 
  lat. 
  42° 
  47' 
  and 
  35° 
  10', 
  by 
  the 
  U. 
  S. 
  Fish 
  Commission. 
  

   Off 
  the 
  coast 
  of 
  Portugal 
  (t. 
  Sladen). 
  

  

  The 
  genus 
  Pararchaster 
  Sladen 
  (1889) 
  is 
  synonymous 
  with 
  

   Benthqpecten 
  (1884). 
  This 
  is 
  a 
  strictly 
  deep-sea 
  genus, 
  none 
  

   of 
  the 
  species 
  occurring 
  in 
  less 
  than 
  400 
  fathoms. 
  It 
  is 
  found 
  

   in 
  all 
  the 
  oceans. 
  The 
  following 
  additional 
  species 
  were 
  

   described 
  by 
  Mr. 
  Sladen 
  : 
  — 
  

  

  B. 
  spinosissimus 
  (SI.) 
  V., 
  Atlantic 
  425 
  fath. 
  

  

  B. 
  simplex 
  (Perrier) 
  V., 
  Caribbean 
  _ 
  1323 
  " 
  

  

  B. 
  antarcticus 
  (SI.) 
  V., 
  Southern 
  Ocean 
  1675 
  " 
  

  

  B. 
  pedicifer 
  (SI.) 
  V., 
  ' 
  " 
  " 
  1600-1900 
  " 
  

  

  B. 
  semisquamatus 
  (SI.) 
  V., 
  Pacific 
  _ 
  565-1875 
  " 
  

  

  All 
  the 
  above 
  species 
  are 
  closely 
  related. 
  Mr. 
  Sladen 
  also 
  

   described 
  a 
  single 
  young 
  specimen, 
  taken 
  off 
  Delaware 
  Bay 
  by 
  

   the 
  Challenger, 
  as 
  a 
  variety 
  (occide?italis) 
  of 
  B. 
  semisquamatus. 
  

   The 
  type 
  of 
  the 
  latter 
  was 
  from 
  off 
  Japan. 
  

  

  This 
  supposed 
  variety 
  appears 
  to 
  me 
  to 
  agree 
  in 
  all 
  respects 
  

   with 
  many 
  young 
  specimens 
  of 
  our 
  B. 
  spinosus, 
  judging 
  from 
  

   Mr. 
  Sladen's 
  detailed 
  description. 
  The 
  two 
  species 
  are 
  evi- 
  

   dently 
  very 
  closely 
  allied. 
  

  

  Pontaster 
  hebitus 
  Sladen. 
  

  

  Pontaster 
  hebitus 
  Sladen, 
  Voyage 
  of 
  the 
  Challenger, 
  vol. 
  xxx, 
  p. 
  33, 
  pi. 
  8, 
  figs. 
  

  

  1, 
  2; 
  pi. 
  12, 
  figs. 
  1, 
  2, 
  1889; 
  Verrill, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  xvii, 
  p. 
  247, 
  

  

  1894. 
  

   Archaster 
  tenuispinus 
  Verrill, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  ii, 
  p. 
  203, 
  1879; 
  Rep. 
  

  

  Com'r 
  of 
  Fish 
  and 
  Fisheries, 
  vol. 
  xi, 
  for 
  1883, 
  p. 
  543, 
  pi. 
  13, 
  fig. 
  38, 
  1885 
  

  

  (perhaps 
  not 
  of 
  Diiben 
  and 
  Koren). 
  

  

  B. 
  range, 
  85 
  to 
  250 
  fath. 
  This 
  species 
  is 
  known 
  only 
  from 
  

   the 
  Banks 
  off 
  Nova 
  Scotia 
  and 
  Newfoundland. 
  It 
  is 
  very 
  

   closely 
  allied 
  to 
  P. 
  tenuispinus 
  of 
  northern 
  Europe, 
  if 
  not 
  

   identical. 
  

  

  Mr. 
  Sladen 
  records 
  twelve 
  species 
  and 
  several 
  varieties 
  of 
  

   Pontaster, 
  not 
  including 
  P. 
  sepitus. 
  Seven 
  species 
  occur 
  in 
  

   the 
  Atlantic. 
  Others 
  are 
  found 
  in 
  the 
  Indo-Pacific 
  and 
  

   Southern 
  Oceans, 
  mostly 
  at 
  great 
  depths. 
  Mr. 
  Perrier 
  has 
  also 
  

   described 
  several 
  additional 
  forms 
  that 
  appear 
  to 
  belong 
  to 
  the 
  

   same 
  genus. 
  Three 
  of 
  these 
  are 
  from 
  the 
  West 
  Indian 
  seas. 
  

  

  Pontaster 
  forcipatus 
  Sladen. 
  

  

  Pontaster 
  for 
  cipatus 
  Sladen. 
  Voyage 
  of 
  the 
  Challenger, 
  xxx, 
  p. 
  43, 
  pi. 
  8, 
  figs. 
  3, 
  

   4; 
  pi. 
  12, 
  figs. 
  3, 
  4, 
  1889; 
  Verrill, 
  Proc. 
  Nat. 
  Mus., 
  vol. 
  xvii, 
  p. 
  24*7. 
  

  

  B. 
  range, 
  828 
  to 
  1396 
  fath. 
  1240 
  to 
  1700 
  fath. 
  (Sladen). 
  

   Taken 
  at 
  45 
  stations, 
  between 
  K 
  lat. 
  41° 
  28' 
  and 
  36° 
  34'.^ 
  

  

  Mr. 
  Sladen 
  (op. 
  cit., 
  p. 
  47) 
  has 
  described 
  a 
  variety 
  (echinata) 
  

   of 
  this 
  species, 
  taken 
  off 
  Marion 
  Island, 
  S. 
  lat. 
  46° 
  46', 
  in 
  1375 
  

   fathoms. 
  

  

  