﻿40 
  PROCEEDiyO^ 
  or 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  SO 
  graphically 
  described 
  by 
  ^lurbach 
  and 
  Shearer 
  (1903), 
  because 
  the 
  

   lower 
  gastric 
  wall 
  shows 
  no 
  signs 
  of 
  contraction. 
  

  

  The 
  gonads 
  afford 
  another 
  instance 
  of 
  variability, 
  for 
  in 
  large 
  

   specimens 
  new 
  canals 
  are 
  interpolated 
  in 
  an 
  entirely 
  iiTegiilar 
  way. 
  

   In 
  the 
  present 
  specimens 
  there 
  is 
  a 
  varying 
  number 
  of 
  young 
  canals, 
  

   some 
  of 
  which 
  are 
  still 
  blind, 
  while 
  others 
  have 
  reachetl 
  the 
  ring 
  

   canal. 
  Preexisting 
  canals, 
  too, 
  can 
  bi- 
  or 
  tri-furcate, 
  though 
  this 
  

   is 
  less 
  common, 
  and 
  occasionally 
  two 
  canals 
  unite. 
  But 
  there 
  is 
  

   never 
  as 
  much 
  anastomosis 
  as 
  is 
  seen 
  in 
  large 
  specimens 
  of 
  A. 
  pensile. 
  

   Gonads 
  are 
  formed 
  on 
  the 
  young 
  canals 
  when 
  they 
  reach 
  the 
  margin, 
  

   and 
  according 
  as 
  more 
  or 
  fewer 
  of 
  the 
  canals 
  are 
  of 
  recent 
  growth 
  

   large 
  or 
  small 
  gonads 
  preponderate 
  in 
  a 
  given 
  individual. 
  In 
  all 
  

   of 
  the 
  Albatross 
  specimens 
  most 
  of 
  the 
  canals 
  are 
  old; 
  for 
  example, 
  

   in 
  an 
  individual 
  of 
  50 
  mm. 
  with 
  73 
  canals 
  there 
  are 
  67 
  large 
  gonads, 
  

   and 
  the 
  remaining 
  16 
  canals 
  have 
  none. 
  

  

  2. 
  var. 
  ALBIDA. 
  

  

  Dutch 
  Harbor, 
  May 
  25, 
  surface; 
  2 
  specimens, 
  about 
  120 
  and 
  about 
  

   165 
  nrni. 
  in 
  diameter; 
  in 
  formalin. 
  

  

  These 
  specimens 
  are 
  in 
  fairly 
  good 
  anatomical 
  condition, 
  but 
  they 
  

   are 
  much 
  flattened, 
  and 
  the 
  gelatinous 
  substance 
  is 
  very 
  hard, 
  their 
  

   appearance 
  suggesting 
  that 
  they 
  were 
  first 
  put 
  in 
  alcohol. 
  Under 
  

   the 
  cu'cumstances 
  nothing 
  can 
  be 
  said 
  about 
  general 
  form 
  further 
  

   than 
  to 
  note 
  that 
  the 
  subumbrella 
  is 
  smooth. 
  

  

  In 
  the 
  larger 
  specimen 
  there 
  are 
  227 
  canals 
  and 
  about 
  675 
  tentacles 
  

   of 
  different 
  ages, 
  old 
  and 
  young 
  roughly 
  alternating. 
  Several 
  small 
  

   segments 
  of 
  the 
  margin 
  are 
  destroyed, 
  but 
  wherever 
  it 
  is 
  intact, 
  as 
  

   it 
  is 
  over 
  most 
  of 
  the 
  circumference, 
  the 
  ratio 
  between 
  tentacles 
  and 
  

   canals 
  is 
  sHghtly 
  more 
  than 
  3:1. 
  Thus, 
  over 
  25 
  canals 
  I 
  counted 
  84 
  

   tentacles 
  and 
  3 
  rudimentary 
  knobs. 
  

  

  In 
  the 
  smaller 
  specimen 
  there 
  are 
  171 
  canals 
  and 
  549 
  tentacles 
  — 
  

   that 
  is, 
  a 
  ratio 
  of 
  slightly 
  more 
  than 
  3:1 
  — 
  and 
  about 
  10 
  rudimentary 
  

   knobs. 
  Specimens 
  from 
  Newfoundland 
  and 
  Grand 
  Manan 
  give 
  the 
  

   following 
  data: 
  diameter 
  85 
  mm., 
  81 
  canals, 
  about 
  380 
  tentacles, 
  and 
  

   about 
  12 
  knobs 
  (72 
  tentacles 
  and 
  3 
  knobs 
  over 
  15 
  canals); 
  diameter 
  

   69 
  mm., 
  97 
  canals, 
  about 
  370 
  tentacles, 
  and 
  90 
  knobs 
  (53 
  tentacles 
  

   and 
  12 
  knobs 
  over 
  14 
  canals); 
  diameter 
  55 
  mm., 
  99 
  canals, 
  204 
  ten- 
  

   tacles, 
  and 
  about 
  75 
  knobs. 
  The 
  tentacle-bulbs 
  are 
  fusiform, 
  slightly 
  

   flattened 
  laterally, 
  and 
  narrower 
  at 
  their 
  junction 
  with 
  the 
  margin; 
  

   they 
  do 
  not 
  clasp 
  the 
  exumbrella. 
  There 
  is 
  an 
  excretory 
  papilla 
  at 
  

   the 
  base 
  of 
  each 
  tentacle, 
  though 
  it 
  might 
  easily 
  be 
  overlooked 
  in 
  

   the 
  Bering 
  Sea 
  specimens 
  owing 
  to 
  distortion. 
  

  

  Stomach 
  and 
  mouth. 
  — 
  In 
  the 
  larger 
  specimen 
  the 
  stomach 
  is 
  about 
  

   85 
  or 
  90 
  mm. 
  in 
  diameter; 
  in 
  the 
  smaller 
  about 
  63 
  mm. 
  — 
  that 
  is, 
  in 
  

   each 
  it 
  is 
  slightly 
  more 
  than 
  half 
  as 
  broad 
  as 
  the 
  bell 
  as 
  a 
  whole 
  ; 
  and 
  

   in 
  each 
  the 
  mouth 
  is 
  nearly 
  closed 
  by 
  long 
  pointed 
  lips, 
  which 
  are 
  

  

  