﻿No. 
  1959. 
  8IPVNCVLID8 
  OF 
  EASTERN 
  NORTH 
  AMERICA— 
  OEROULD. 
  421 
  

  

  In 
  the 
  front 
  part 
  of 
  the 
  introvert 
  a 
  smooth 
  zone 
  is 
  sharply 
  marked 
  

   off; 
  and 
  a 
  small, 
  upright 
  coUar, 
  split 
  dorsally, 
  lies 
  at 
  the 
  base 
  of 
  the 
  

   numerous 
  (50-80) 
  long, 
  thread-shaped 
  tentacles, 
  which 
  are 
  often 
  

   transversely 
  striped 
  with 
  alternating 
  rings 
  of 
  brown 
  and 
  white. 
  

   The 
  longitudinal 
  muscle 
  layer 
  consists 
  of 
  separate, 
  frequently 
  anas- 
  

   tomosing 
  bands 
  (30 
  in 
  the 
  middle 
  of 
  the 
  trunk, 
  20 
  in 
  the 
  front, 
  but 
  

   subject 
  to 
  much 
  variation). 
  Four 
  retractor 
  muscles 
  arise 
  near 
  one 
  

   another 
  in 
  the 
  second 
  third 
  of 
  the 
  trunk, 
  but 
  immediately 
  imite 
  on 
  

   each 
  side 
  to 
  form 
  a 
  single, 
  lateral 
  muscle. 
  Brain 
  with 
  distinct 
  eye 
  

   spots. 
  Intestinal 
  coil 
  of 
  few 
  (about 
  20) 
  whorls. 
  Rectum 
  long. 
  

   A 
  columellar 
  muscle 
  fastens 
  the 
  intestine 
  in 
  front 
  of 
  the 
  anus 
  and 
  at 
  

   the 
  posterior 
  end 
  of 
  the 
  tnmk. 
  The 
  contractile 
  vessel 
  on 
  the 
  esopha- 
  

   gus 
  and 
  on 
  the 
  first 
  intestinal 
  coil 
  has 
  many 
  finger-shaped 
  divertictda 
  

   terminating 
  in 
  tubular 
  caeca. 
  Nephridia 
  very 
  long 
  (over 
  one-half 
  

   the 
  length 
  of 
  the 
  trunk) 
  and 
  attached 
  along 
  almost 
  the 
  whole 
  length 
  

   to 
  the 
  body 
  wall 
  by 
  a 
  fold 
  of 
  peritoneum. 
  

  

  One 
  of 
  the 
  specimens 
  from 
  Key 
  West 
  is 
  unusually 
  large, 
  the 
  trunk 
  

   bemg 
  47 
  mm. 
  in 
  length. 
  The 
  usual 
  length 
  of 
  the 
  trunk 
  is 
  about 
  

   30 
  mm.; 
  introvert 
  18 
  mm. 
  

  

  PHYSCOSOMA 
  CAPITATUM, 
  new 
  species. 
  

  

  Station 
  2231, 
  lat. 
  38° 
  29' 
  N.; 
  long. 
  73° 
  09' 
  W., 
  east 
  of 
  Cape 
  May; 
  

   965 
  fathoms, 
  gray 
  ooze; 
  temperature 
  at 
  bottom, 
  36.8° 
  F. 
  

  

  Station 
  2103, 
  lat. 
  38° 
  47' 
  20" 
  N.; 
  long. 
  72° 
  37' 
  W., 
  east 
  of 
  Cape 
  

   May; 
  1,091 
  fathoms, 
  Globigerina 
  ooze; 
  temperature 
  at 
  bottom, 
  39° 
  F. 
  

  

  Station 
  2685, 
  lat. 
  39° 
  35' 
  N.; 
  long. 
  71° 
  02' 
  30" 
  W., 
  south 
  of 
  Mar- 
  

   thas 
  Vineyard; 
  1,137 
  fathoms, 
  green 
  mud 
  with 
  white 
  specks; 
  tem- 
  

   perature 
  at 
  bottom, 
  37.9° 
  F. 
  

  

  Station 
  2029, 
  lat. 
  39° 
  42' 
  N.; 
  long. 
  70° 
  47' 
  W.; 
  south 
  of 
  Marthas 
  

   Vineyard; 
  1,168 
  fathoms, 
  gray 
  mud; 
  temperature 
  at 
  bottom, 
  38^° 
  F. 
  

  

  Type.— 
  C&t. 
  No. 
  4067, 
  U.S.N.M. 
  

  

  Station 
  2093, 
  lat. 
  39° 
  42' 
  50" 
  N.; 
  long. 
  71° 
  01' 
  20" 
  W., 
  south 
  of 
  

   Marthas 
  Vineyard; 
  1,000 
  fathoms, 
  foraminifera, 
  sand 
  and 
  mud; 
  tem- 
  

   perature 
  at 
  bottom, 
  39° 
  F. 
  

  

  Station 
  2192, 
  lat. 
  39° 
  46' 
  30" 
  N.; 
  long. 
  70° 
  14' 
  45" 
  W., 
  south 
  of 
  

   Marthas 
  Vineyard; 
  1,060 
  fathoms, 
  gray 
  ooze; 
  temperature 
  at 
  bot- 
  

   tom, 
  38.6° 
  F. 
  

  

  Station 
  2572, 
  lat. 
  40° 
  29' 
  N.; 
  long. 
  66° 
  04' 
  W., 
  southeast 
  of 
  Georges 
  

   Bank; 
  1,769 
  fathoms, 
  gray 
  ooze; 
  temperature 
  at 
  bottom, 
  37.8° 
  F. 
  

  

  Station 
  2531, 
  lat. 
  40° 
  42' 
  N.; 
  long..66° 
  33' 
  W.; 
  southeast 
  of 
  Georges 
  

   Bank; 
  852 
  fathoms, 
  gray 
  mud; 
  temperature 
  at 
  bottom, 
  38.4° 
  F. 
  

  

  Station 
  2530, 
  lat. 
  40° 
  52' 
  30" 
  N.; 
  long. 
  66° 
  24' 
  W., 
  southeast 
  of 
  

   Georges 
  Bank; 
  956 
  fathoms, 
  gray 
  ooze; 
  temperature 
  at 
  bottom, 
  

   38.4° 
  F. 
  

  

  