﻿68 
  A 
  MONOGRAPH 
  OF 
  THE 
  VICTORIAN 
  SPONGES. 
  

  

  easily 
  to 
  be 
  recognised. 
  Curiously 
  enough 
  Mr. 
  Carter, 
  in 
  bis 
  original 
  descrijition, 
  

   makes 
  no 
  mention 
  of 
  tbe 
  sagittal 
  character 
  exhibited 
  by 
  most 
  of 
  the 
  spicules, 
  but 
  

   this 
  character 
  is 
  very 
  clearly 
  shown 
  in 
  a 
  portion 
  of 
  one 
  of 
  his 
  types 
  of 
  the 
  species 
  

   sent 
  to 
  me 
  from 
  the 
  British 
  Museum 
  ; 
  to 
  such 
  an 
  extent, 
  indeed, 
  that 
  the 
  oral 
  rays 
  

   are 
  sometimes 
  slightly 
  recuryed 
  towards 
  the 
  basal, 
  in 
  addition 
  to 
  being 
  markedly 
  

   shorter. 
  

  

  The 
  only 
  other 
  species 
  which 
  could 
  possibly 
  be 
  included 
  amongst 
  the 
  Homocoela 
  

   radiata 
  is 
  von 
  Lendenfeld's 
  Hoviodernia 
  sycandra^ 
  , 
  indeed 
  his 
  diagnosis 
  of 
  the 
  

   Homodermidcs.y'vL., 
  "Homocoela 
  with 
  radial 
  tubes" 
  would 
  serye 
  yery 
  well 
  for 
  the 
  

   radiate 
  section 
  of 
  the 
  genus 
  Lencosolenia. 
  His 
  figures 
  oi 
  Hovwdenna, 
  however, 
  and 
  

   especially 
  of 
  the 
  collared 
  cells, 
  are 
  so 
  exceedingly 
  diagrammatic 
  and 
  his 
  description 
  of 
  

   the 
  histology 
  so 
  scanty 
  that, 
  as 
  stated 
  previously, 
  I 
  must 
  agree 
  with 
  Vosmaerf 
  in 
  

   regarding 
  the 
  matter 
  as 
  still 
  S7il) 
  Judice. 
  Even 
  if 
  Hoinoderma 
  sycandra 
  be 
  a 
  

   Homocoelous 
  sponge 
  still 
  it 
  is 
  totally 
  different 
  from 
  Lencosolenia 
  tripodifera, 
  

   conforming 
  as 
  it 
  does 
  in 
  every 
  particular 
  except 
  the 
  problematical 
  extension 
  of 
  

   the 
  collared 
  cells 
  into 
  the 
  gastral 
  cavity, 
  to 
  the 
  normal 
  Sycon 
  type 
  with 
  unbranched 
  

   radial 
  tubes 
  (flagellated 
  chambers). 
  

  

  Unfortunately 
  I 
  have 
  not 
  had 
  the 
  opportunity 
  of 
  examining 
  a 
  specimen 
  

   of 
  Carter's 
  Clathrina 
  tripodifera 
  var. 
  gravida,\ 
  but 
  there 
  seems 
  no 
  doubt 
  

   that 
  it 
  really 
  is 
  a 
  slight 
  variety 
  of 
  Leucosoleuia 
  tripodifera 
  ; 
  the 
  only 
  doubt 
  seems 
  to 
  be 
  

   whether 
  it 
  deserves 
  a 
  special 
  varietal 
  name. 
  The 
  variety 
  was 
  represented 
  by 
  a 
  single 
  

   very 
  small 
  specimen 
  with 
  several 
  oscula 
  ; 
  according 
  to 
  Mr. 
  Carter's 
  description 
  there 
  

   are 
  no 
  quadriradiate 
  spicules 
  present, 
  but 
  in 
  an 
  unpublished 
  illustration 
  of 
  the 
  

   variety 
  which 
  he 
  has 
  kindly 
  sent 
  me 
  a 
  quadriradiate 
  spicule 
  of 
  the 
  usual 
  form 
  is 
  figured 
  ; 
  

   another 
  difference 
  lies 
  in 
  the 
  more 
  slender 
  character 
  of 
  the 
  rays 
  of 
  the 
  internal 
  

   trn-adiates 
  in 
  the 
  variety 
  gravida. 
  An 
  unfortunate 
  complication 
  in 
  nomenclature 
  

   arises 
  from 
  Mr. 
  Carter's 
  statement 
  after 
  the 
  description 
  of 
  this 
  variety 
  {loc. 
  cit.) 
  :— 
  

   " 
  There 
  can 
  be 
  no 
  doubt 
  that 
  this 
  is 
  the 
  same 
  sponge 
  as, 
  only 
  in 
  a 
  larger 
  form 
  than, 
  

   that 
  which 
  I 
  described 
  and 
  illustrated 
  under 
  the 
  name 
  of 
  ' 
  Leiuetta 
  clathrata 
  ' 
  

   C 
  Annals', 
  1883, 
  Vol. 
  XL, 
  p. 
  33; 
  PL 
  I, 
  Figs. 
  13-17)." 
  As 
  the 
  name 
  daf/irus 
  has 
  

   already 
  been 
  used 
  for 
  a 
  species 
  of 
  Leucosolenial 
  and 
  as 
  the 
  original 
  description 
  of 
  

   Leuceiia 
  clathrata 
  was 
  so 
  imperfect 
  we 
  may 
  perhaps 
  with 
  advantage 
  retain 
  

   Mr. 
  Carter's 
  later 
  name 
  tripodifera 
  for 
  the 
  species 
  under 
  consideration, 
  in 
  preference 
  

   to 
  reverting 
  to 
  the 
  name 
  which 
  seems 
  to 
  have 
  a 
  prior 
  claim. 
  

  

  {e.) 
  Localities. 
  ~]^eM 
  Port 
  Phillip 
  Heads. 
  (Coll. 
  J. 
  B. 
  Wilson); 
  Westernport 
  

   (Victoria), 
  Kent 
  Islands 
  (Bass 
  Straits). 
  (Coll. 
  J. 
  Gabriel.) 
  

  

  ; 
  ^""''"f,f 
  *'' 
  "^'T''" 
  '""'' 
  °' 
  ^'^ 
  '°"'' 
  ^''''' 
  ''''• 
  ^^- 
  ^^'' 
  '' 
  P- 
  l««^- 
  ^-'-^ 
  -1- 
  P- 
  70 
  ot 
  this 
  memoir, 
  

   t 
  Bronn 
  s 
  Klassen 
  und 
  Ordnungen 
  des 
  Thierreichs." 
  " 
  Poi-ifera," 
  p. 
  387. 
  

  

  J 
  Annals 
  and 
  Pilagazine 
  of 
  Natural 
  History, 
  June, 
  188G, 
  p. 
  507. 
  

  

  S 
  Vide 
  H*ckel, 
  " 
  Die 
  Kalkschwaname," 
  Vol. 
  II., 
  p. 
  3o'. 
  (Asc'etta 
  clathrus). 
  

  

  