﻿ACADEMY 
  OF 
  SCIENCES. 
  149 
  

  

  In 
  some 
  specimens, 
  the 
  pnlypiferous 
  portion 
  makes 
  from 
  one 
  to 
  two 
  turns 
  

   around 
  the 
  axis 
  in 
  its 
  entire 
  length. 
  Plate 
  IX, 
  fig. 
  1, 
  exhibits 
  the 
  general 
  

   aspect 
  of 
  the 
  species, 
  reduced 
  to 
  a 
  scale 
  of 
  one 
  inch 
  to 
  the 
  foot 
  ; 
  fig. 
  2, 
  a 
  

   section 
  of 
  the 
  polypiferous 
  part 
  of 
  one 
  of 
  the 
  oldest 
  and 
  largest 
  specimens. 
  

  

  The 
  average 
  dimensions 
  of 
  thirty-six 
  (36) 
  of 
  the 
  axes 
  in 
  the 
  Museum 
  of 
  the 
  

   California 
  Academy 
  is 
  five 
  feet 
  six 
  and 
  one 
  third 
  inches 
  in 
  length, 
  and 
  the 
  diam- 
  

   eter 
  of 
  the 
  largest, 
  nine 
  thirty-seconds 
  of 
  an 
  inch 
  ; 
  diameter 
  of 
  smallest 
  speci- 
  

   men, 
  one 
  sixteenth 
  of 
  an 
  inch. 
  

  

  Dr. 
  Blake's 
  specimens 
  were 
  preserved 
  in 
  a 
  mixture 
  of 
  glycerine 
  and 
  alcohol, 
  

   and 
  the 
  more 
  delicate 
  tissue 
  of 
  the 
  polyps 
  appears 
  to 
  have 
  been 
  somewhat 
  in- 
  

   jured 
  by 
  the 
  latter 
  ingredient. 
  

  

  Additional 
  specimens 
  of 
  the 
  above 
  species, 
  from 
  the 
  same 
  locality, 
  have 
  been 
  

   received 
  from 
  J. 
  .S. 
  Lawson, 
  Esq.,* 
  of 
  the 
  U. 
  S. 
  Coast 
  Survey, 
  by 
  George 
  Dav- 
  

   idson, 
  Esq., 
  President 
  of 
  the 
  Academy. 
  These 
  latter 
  were 
  put 
  in 
  glycerine 
  

   only, 
  and 
  are 
  in 
  better 
  condition 
  than 
  those 
  received 
  by 
  Dr. 
  Blake. 
  Of 
  

   the 
  specimens 
  received 
  from 
  Mr. 
  Lawson, 
  some 
  individuals 
  are 
  younger 
  

   than 
  either 
  of 
  Dr. 
  Blake's. 
  In 
  these 
  the 
  polyp-rows 
  are 
  farther 
  apart, 
  and 
  

   there 
  are 
  not 
  so 
  many 
  polyps 
  in 
  the 
  row 
  ; 
  neither 
  do 
  the 
  ends 
  of 
  the 
  rows 
  ap- 
  

   proximate 
  so 
  closely 
  on 
  the 
  side 
  opposite 
  the 
  axial 
  edge 
  ; 
  the 
  polyps 
  being 
  not 
  

   nearly 
  so 
  many 
  in 
  the 
  same 
  length, 
  or 
  presenting 
  (as 
  do 
  some 
  of 
  Dr. 
  Blake's 
  

   specimen?) 
  so 
  crowded 
  an 
  appearance. 
  In 
  cross-section 
  through 
  the 
  polypiferous 
  

   portions, 
  the 
  younger 
  individuals 
  are 
  less 
  oval 
  or 
  acutely-ovate 
  than 
  in 
  the 
  older 
  

   specimens. 
  A 
  comparison 
  of 
  individuals 
  indicates 
  an 
  external 
  differentiation, 
  

   analogous 
  to 
  that 
  displayed 
  by 
  specimens 
  of 
  the 
  same 
  species 
  in 
  Virgularia. 
  

   The 
  general 
  aspect 
  of 
  this 
  species, 
  judging 
  from 
  the 
  figure 
  in 
  Plate 
  XXXI 
  of 
  

   Johnston's 
  British 
  Zoophytes 
  (2d 
  ed.), 
  is 
  like 
  P. 
  quadrangular 
  is 
  from 
  Oban, 
  on- 
  

   ly 
  in 
  that 
  species 
  the 
  rows 
  of 
  polyps, 
  it 
  is 
  stated, 
  are 
  composed 
  of 
  " 
  four, 
  five 
  

   or 
  six 
  polyps 
  in 
  a 
  row," 
  one 
  figure 
  showing 
  seven. 
  

  

  I 
  have 
  named 
  this 
  species 
  for 
  Dr. 
  James 
  Blake, 
  of 
  San 
  Francisco, 
  author 
  of 
  

   many 
  valuable 
  scientific 
  papers, 
  to 
  whom 
  I 
  am 
  indebted 
  for 
  numerous 
  courtesies. 
  

  

  On 
  the 
  Structure 
  of 
  Verrillia 
  Blakei. 
  

  

  BY 
  JAMES 
  BLAKE, 
  M. 
  D. 
  

  

  When 
  engaged 
  in 
  examining 
  the 
  dry 
  rods 
  of 
  the 
  ccelenterate 
  animal 
  which 
  

   has 
  now 
  been 
  shown 
  to 
  be 
  the 
  axis 
  of 
  a 
  Pavonaria, 
  I 
  found 
  adhering 
  to 
  the 
  

   basal 
  extremity 
  of 
  some 
  of 
  the 
  rods 
  a 
  portion 
  of 
  the 
  soft 
  parts, 
  which 
  in 
  sec- 
  

   tion 
  presented 
  a 
  quadrate 
  form 
  somewhat 
  resembling 
  a 
  Maltese 
  cross. 
  An 
  

   examination 
  of 
  the 
  specimens 
  recently 
  received 
  affords 
  an 
  explanation 
  of 
  this 
  

   form 
  assumed 
  by 
  the 
  basal 
  portion 
  of 
  the 
  animal, 
  and 
  shows 
  how 
  the 
  symmet- 
  

   rical 
  basal 
  portion 
  has 
  given 
  rise 
  to 
  the 
  exceedingly 
  unsyrametrical 
  production 
  

  

  *The 
  following 
  remarks 
  accompanied 
  the 
  specimens 
  received 
  from 
  Mr. 
  Lawson 
  : 
  " 
  Ob- 
  

   tained 
  from 
  fishermen 
  by 
  J. 
  C. 
  Hughes, 
  Esq., 
  of 
  Burrard's 
  Inlet, 
  (Gulf 
  of 
  Georgia), 
  at 
  the 
  

   request 
  of 
  Jas. 
  S. 
  Drummond, 
  Esq., 
  of 
  Victoria, 
  who 
  kindly 
  and 
  keenly 
  interested 
  himself 
  

   for 
  me. 
  JAMES 
  S. 
  LAWSON." 
  

  

  